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Version: 1.5.1

Class: CantonChain

Defined in: canton/index.ts:83

Canton chain implementation supporting Canton Ledger networks.

Extends​

Indexable​

[key: symbol]: () => string

Constructors​

Constructor​

new CantonChain(client: { getActiveContracts: Promise<{ contractEntry?: { JsActiveContract: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; reassignmentCounter: number; synchronizerId: string; }; } | { JsEmpty: Record<string, never>; } | { JsIncompleteAssigned: { assignedEvent: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: ...[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; reassignmentCounter: number; reassignmentId: string; source: string; submitter?: string; target: string; }; }; } | { JsIncompleteUnassigned: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; unassignedEvent: { assignmentExclusivity?: string; contractId: string; nodeId: number; offset: number; packageName: string; reassignmentCounter: number; reassignmentId: string; source: string; submitter?: string; target: string; templateId: string; witnessParties: string[]; }; }; }; workflowId?: string; }[]>; getConnectedSynchronizers: Promise<{ permission: "PARTICIPANT_PERMISSION_CONFIRMATION" | "PARTICIPANT_PERMISSION_OBSERVATION" | "PARTICIPANT_PERMISSION_SUBMISSION" | "PARTICIPANT_PERMISSION_UNSPECIFIED"; synchronizerAlias: string; synchronizerId: string; }[]>; getLedgerEnd: Promise<{ offset: number; }>; getParticipantId: Promise<string>; getTransactionById: Promise<{ commandId?: string; effectiveAt: string; events: ({ ArchivedEvent: { contractId: string; implementedInterfaces?: string[]; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; } | { CreatedEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ... | ...; interfaceId: string; viewStatus: { code: ...; details?: ...; message: ...; }; viewValue?: unknown; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; } | { ExercisedEvent: { acsDelta: boolean; actingParties: string[]; choice: string; choiceArgument: unknown; consuming: boolean; contractId: string; exerciseResult: unknown; implementedInterfaces?: string[]; interfaceId?: string; lastDescendantNodeId: number; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; })[]; externalTransactionHash?: string; offset: number; recordTime: string; synchronizerId: string; traceContext?: { traceparent?: string; tracestate?: string; }; updateId: string; workflowId?: string; }>; getUpdateById: Promise<unknown>; isAlive: Promise<boolean>; isReady: Promise<boolean>; listParties: Promise<unknown[] | undefined>; submitAndWait: Promise<{ completionOffset: number; updateId: string; }>; submitAndWaitForTransaction: Promise<{ transaction: { commandId?: string; effectiveAt: string; events: ({ ArchivedEvent: { contractId: string; implementedInterfaces?: string[]; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; } | { CreatedEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; } | { ExercisedEvent: { acsDelta: boolean; actingParties: string[]; choice: string; choiceArgument: unknown; consuming: boolean; contractId: string; exerciseResult: unknown; implementedInterfaces?: string[]; interfaceId?: string; lastDescendantNodeId: number; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; })[]; externalTransactionHash?: string; offset: number; recordTime: string; synchronizerId: string; traceContext?: { traceparent?: string; tracestate?: string; }; updateId: string; workflowId?: string; }; }>; }, acsDisclosureProvider: AcsDisclosureProvider, edsDisclosureProvider: EdsDisclosureProvider, transferInstructionClient: { getAcceptContext: Promise<ChoiceContext>; getRejectContext: Promise<ChoiceContext>; getTransferFactory: Promise<TransferFactoryWithChoiceContext>; getWithdrawContext: Promise<ChoiceContext>; }, tokenMetadataClient: { getInstrument: Promise<Instrument>; getRegistryInfo: Promise<GetRegistryInfoResponse>; listInstruments: Promise<ListInstrumentsResponse>; }, ccipParty: string, indexerUrl: string, network: NetworkInfo<"CANTON">, ctx?: ChainContext): CantonChain

Defined in: canton/index.ts:112

Creates a new CantonChain instance.

Parameters​

ParameterTypeDescription
client{ getActiveContracts: Promise<{ contractEntry?: { JsActiveContract: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; reassignmentCounter: number; synchronizerId: string; }; } | { JsEmpty: Record<string, never>; } | { JsIncompleteAssigned: { assignedEvent: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: ...[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; reassignmentCounter: number; reassignmentId: string; source: string; submitter?: string; target: string; }; }; } | { JsIncompleteUnassigned: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; unassignedEvent: { assignmentExclusivity?: string; contractId: string; nodeId: number; offset: number; packageName: string; reassignmentCounter: number; reassignmentId: string; source: string; submitter?: string; target: string; templateId: string; witnessParties: string[]; }; }; }; workflowId?: string; }[]>; getConnectedSynchronizers: Promise<{ permission: "PARTICIPANT_PERMISSION_CONFIRMATION" | "PARTICIPANT_PERMISSION_OBSERVATION" | "PARTICIPANT_PERMISSION_SUBMISSION" | "PARTICIPANT_PERMISSION_UNSPECIFIED"; synchronizerAlias: string; synchronizerId: string; }[]>; getLedgerEnd: Promise<{ offset: number; }>; getParticipantId: Promise<string>; getTransactionById: Promise<{ commandId?: string; effectiveAt: string; events: ({ ArchivedEvent: { contractId: string; implementedInterfaces?: string[]; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; } | { CreatedEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ... | ...; interfaceId: string; viewStatus: { code: ...; details?: ...; message: ...; }; viewValue?: unknown; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; } | { ExercisedEvent: { acsDelta: boolean; actingParties: string[]; choice: string; choiceArgument: unknown; consuming: boolean; contractId: string; exerciseResult: unknown; implementedInterfaces?: string[]; interfaceId?: string; lastDescendantNodeId: number; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; })[]; externalTransactionHash?: string; offset: number; recordTime: string; synchronizerId: string; traceContext?: { traceparent?: string; tracestate?: string; }; updateId: string; workflowId?: string; }>; getUpdateById: Promise<unknown>; isAlive: Promise<boolean>; isReady: Promise<boolean>; listParties: Promise<unknown[] | undefined>; submitAndWait: Promise<{ completionOffset: number; updateId: string; }>; submitAndWaitForTransaction: Promise<{ transaction: { commandId?: string; effectiveAt: string; events: ({ ArchivedEvent: { contractId: string; implementedInterfaces?: string[]; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; } | { CreatedEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; } | { ExercisedEvent: { acsDelta: boolean; actingParties: string[]; choice: string; choiceArgument: unknown; consuming: boolean; contractId: string; exerciseResult: unknown; implementedInterfaces?: string[]; interfaceId?: string; lastDescendantNodeId: number; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; })[]; externalTransactionHash?: string; offset: number; recordTime: string; synchronizerId: string; traceContext?: { traceparent?: string; tracestate?: string; }; updateId: string; workflowId?: string; }; }>; }Canton Ledger API client.
client.getActiveContracts-
client.getConnectedSynchronizers-
client.getLedgerEnd-
client.getParticipantId-
client.getTransactionById-
client.getUpdateById-
client.isAlive-
client.isReady-
client.listParties?-
client.submitAndWait?-
client.submitAndWaitForTransaction?-
acsDisclosureProvider?AcsDisclosureProviderACS-based disclosure provider.
edsDisclosureProvider?EdsDisclosureProviderEDS-based disclosure provider.
transferInstructionClient?{ getAcceptContext: Promise<ChoiceContext>; getRejectContext: Promise<ChoiceContext>; getTransferFactory: Promise<TransferFactoryWithChoiceContext>; getWithdrawContext: Promise<ChoiceContext>; }Transfer Instruction API client.
transferInstructionClient.getAcceptContext?-
transferInstructionClient.getRejectContext?-
transferInstructionClient.getTransferFactory?-
transferInstructionClient.getWithdrawContext?-
tokenMetadataClient?{ getInstrument: Promise<Instrument>; getRegistryInfo: Promise<GetRegistryInfoResponse>; listInstruments: Promise<ListInstrumentsResponse>; }Token Metadata API client.
tokenMetadataClient.getInstrument?-
tokenMetadataClient.getRegistryInfo?-
tokenMetadataClient.listInstruments?-
ccipParty?stringThe party ID to use for CCIP operations
indexerUrl?stringBase URL of the CCV indexer service.
network?NetworkInfo<"CANTON">Network information for this chain.
ctx?ChainContextContext containing logger.

Returns​

CantonChain

Overrides​

Chain<typeof ChainFamily.Canton>.constructor

Properties​

acsDisclosureProvider​

readonly acsDisclosureProvider: AcsDisclosureProvider

Defined in: canton/index.ts:93

apiClient​

readonly apiClient: CCIPAPIClient | null

Defined in: chain.ts:562

CCIP API client (null if opted out)

Inherited from​

Chain.apiClient

apiRetryConfig​

readonly apiRetryConfig: Required<ApiRetryConfig> | null

Defined in: chain.ts:564

Retry configuration for API fallback operations (null if API client is disabled)

Inherited from​

Chain.apiRetryConfig

ccipParty​

readonly ccipParty: string

Defined in: canton/index.ts:98

edsDisclosureProvider​

readonly edsDisclosureProvider: EdsDisclosureProvider

Defined in: canton/index.ts:94

indexerUrl​

readonly indexerUrl: string

Defined in: canton/index.ts:97

logger​

logger: Logger

Defined in: chain.ts:560

Inherited from​

Chain.logger

network​

readonly network: NetworkInfo<"CANTON">

Defined in: canton/index.ts:91

Overrides​

Chain.network

provider​

readonly provider: { getActiveContracts: Promise<{ contractEntry?: { JsActiveContract: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; reassignmentCounter: number; synchronizerId: string; }; } | { JsEmpty: Record<string, never>; } | { JsIncompleteAssigned: { assignedEvent: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: ...[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; reassignmentCounter: number; reassignmentId: string; source: string; submitter?: string; target: string; }; }; } | { JsIncompleteUnassigned: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; unassignedEvent: { assignmentExclusivity?: string; contractId: string; nodeId: number; offset: number; packageName: string; reassignmentCounter: number; reassignmentId: string; source: string; submitter?: string; target: string; templateId: string; witnessParties: string[]; }; }; }; workflowId?: string; }[]>; getConnectedSynchronizers: Promise<{ permission: "PARTICIPANT_PERMISSION_CONFIRMATION" | "PARTICIPANT_PERMISSION_OBSERVATION" | "PARTICIPANT_PERMISSION_SUBMISSION" | "PARTICIPANT_PERMISSION_UNSPECIFIED"; synchronizerAlias: string; synchronizerId: string; }[]>; getLedgerEnd: Promise<{ offset: number; }>; getParticipantId: Promise<string>; getTransactionById: Promise<{ commandId?: string; effectiveAt: string; events: ({ ArchivedEvent: { contractId: string; implementedInterfaces?: string[]; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; } | { CreatedEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ... | ...; interfaceId: string; viewStatus: { code: ...; details?: ...; message: ...; }; viewValue?: unknown; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; } | { ExercisedEvent: { acsDelta: boolean; actingParties: string[]; choice: string; choiceArgument: unknown; consuming: boolean; contractId: string; exerciseResult: unknown; implementedInterfaces?: string[]; interfaceId?: string; lastDescendantNodeId: number; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; })[]; externalTransactionHash?: string; offset: number; recordTime: string; synchronizerId: string; traceContext?: { traceparent?: string; tracestate?: string; }; updateId: string; workflowId?: string; }>; getUpdateById: Promise<unknown>; isAlive: Promise<boolean>; isReady: Promise<boolean>; listParties: Promise<unknown[] | undefined>; submitAndWait: Promise<{ completionOffset: number; updateId: string; }>; submitAndWaitForTransaction: Promise<{ transaction: { commandId?: string; effectiveAt: string; events: ({ ArchivedEvent: { contractId: string; implementedInterfaces?: string[]; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; } | { CreatedEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; } | { ExercisedEvent: { acsDelta: boolean; actingParties: string[]; choice: string; choiceArgument: unknown; consuming: boolean; contractId: string; exerciseResult: unknown; implementedInterfaces?: string[]; interfaceId?: string; lastDescendantNodeId: number; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; })[]; externalTransactionHash?: string; offset: number; recordTime: string; synchronizerId: string; traceContext?: { traceparent?: string; tracestate?: string; }; updateId: string; workflowId?: string; }; }>; }

Defined in: canton/index.ts:92

getActiveContracts()​

getActiveContracts(request: { activeAtOffset: number; eventFormat?: { filtersByParty?: {[key: string]: { cumulative?: { identifierFilter?: ... | ... | ... | ... | ...; }[]; }; }; filtersForAnyParty?: { cumulative?: { identifierFilter?: { Empty: ...; } | { InterfaceFilter: ...; } | { TemplateFilter: ...; } | { WildcardFilter: ...; }; }[]; }; verbose?: boolean; }; filter?: { filtersByParty?: {[key: string]: { cumulative?: { identifierFilter?: ... | ... | ... | ... | ...; }[]; }; }; filtersForAnyParty?: { cumulative?: { identifierFilter?: { Empty: ...; } | { InterfaceFilter: ...; } | { TemplateFilter: ...; } | { WildcardFilter: ...; }; }[]; }; }; verbose?: boolean; }, options?: { limit?: number; }): Promise<{ contractEntry?: { JsActiveContract: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; reassignmentCounter: number; synchronizerId: string; }; } | { JsEmpty: Record<string, never>; } | { JsIncompleteAssigned: { assignedEvent: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: ...[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; reassignmentCounter: number; reassignmentId: string; source: string; submitter?: string; target: string; }; }; } | { JsIncompleteUnassigned: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; unassignedEvent: { assignmentExclusivity?: string; contractId: string; nodeId: number; offset: number; packageName: string; reassignmentCounter: number; reassignmentId: string; source: string; submitter?: string; target: string; templateId: string; witnessParties: string[]; }; }; }; workflowId?: string; }[]>

Query active contracts on the ledger

Parameters​
ParameterTypeDescription
request{ activeAtOffset: number; eventFormat?: { filtersByParty?: {[key: string]: { cumulative?: { identifierFilter?: ... | ... | ... | ... | ...; }[]; }; }; filtersForAnyParty?: { cumulative?: { identifierFilter?: { Empty: ...; } | { InterfaceFilter: ...; } | { TemplateFilter: ...; } | { WildcardFilter: ...; }; }[]; }; verbose?: boolean; }; filter?: { filtersByParty?: {[key: string]: { cumulative?: { identifierFilter?: ... | ... | ... | ... | ...; }[]; }; }; filtersForAnyParty?: { cumulative?: { identifierFilter?: { Empty: ...; } | { InterfaceFilter: ...; } | { TemplateFilter: ...; } | { WildcardFilter: ...; }; }[]; }; }; verbose?: boolean; }-
request.activeAtOffsetnumberFormat: int64 Description The offset at which the snapshot of the active contracts will be computed. Must be no greater than the current ledger end offset. Must be greater than or equal to the last pruning offset. Required, must be a valid absolute offset (positive integer) or ledger begin offset (zero). If zero, the empty set will be returned.
request.eventFormat?{ filtersByParty?: {[key: string]: { cumulative?: { identifierFilter?: ... | ... | ... | ... | ...; }[]; }; }; filtersForAnyParty?: { cumulative?: { identifierFilter?: { Empty: ...; } | { InterfaceFilter: ...; } | { TemplateFilter: ...; } | { WildcardFilter: ...; }; }[]; }; verbose?: boolean; }Description Format of the contract_entries in the result. In case of CreatedEvent the presentation will be of TRANSACTION_SHAPE_ACS_DELTA. Optional for backwards compatibility, defaults to an EventFormat where: - filters_by_party is the filter.filters_by_party from this request - filters_for_any_party is the filter.filters_for_any_party from this request - verbose is the verbose field from this request
request.eventFormat.filtersByParty?{[key: string]: { cumulative?: { identifierFilter?: ... | ... | ... | ... | ...; }[]; }; }Description Each key must be a valid PartyIdString (as described in value.proto). The interpretation of the filter depends on the transaction-shape being filtered: 1. For ledger-effects create and exercise events are returned, for which the witnesses include at least one of the listed parties and match the per-party filter. 2. For transaction and active-contract-set streams create and archive events are returned for all contracts whose stakeholders include at least one of the listed parties and match the per-party filter. Optional
request.eventFormat.filtersForAnyParty?{ cumulative?: { identifierFilter?: { Empty: ...; } | { InterfaceFilter: ...; } | { TemplateFilter: ...; } | { WildcardFilter: ...; }; }[]; }Description Wildcard filters that apply to all the parties existing on the participant. The interpretation of the filters is the same with the per-party filter as described above. Optional
request.eventFormat.filtersForAnyParty.cumulative?{ identifierFilter?: { Empty: ...; } | { InterfaceFilter: ...; } | { TemplateFilter: ...; } | { WildcardFilter: ...; }; }[]Description Every filter in the cumulative list expands the scope of the resulting stream. Each interface, template or wildcard filter means additional events that will match the query. The impact of include_interface_view and include_created_event_blob fields in the filters will also be accumulated. A template or an interface SHOULD NOT appear twice in the accumulative field. A wildcard filter SHOULD NOT be defined more than once in the accumulative field. Optional, if no CumulativeFilter defined, the default of a single WildcardFilter with include_created_event_blob unset is used.
request.eventFormat.verbose?booleanDescription If enabled, values served over the API will contain more information than strictly necessary to interpret the data. In particular, setting the verbose flag to true triggers the ledger to include labels for record fields. Optional
request.filter?{ filtersByParty?: {[key: string]: { cumulative?: { identifierFilter?: ... | ... | ... | ... | ...; }[]; }; }; filtersForAnyParty?: { cumulative?: { identifierFilter?: { Empty: ...; } | { InterfaceFilter: ...; } | { TemplateFilter: ...; } | { WildcardFilter: ...; }; }[]; }; }Description Provided for backwards compatibility, it will be removed in the Canton version 3.5.0. Templates to include in the served snapshot, per party. Optional, if specified event_format must be unset, if not specified event_format must be set.
request.filter.filtersByParty?{[key: string]: { cumulative?: { identifierFilter?: ... | ... | ... | ... | ...; }[]; }; }Description Each key must be a valid PartyIdString (as described in value.proto). The interpretation of the filter depends on the transaction-shape being filtered: 1. For transaction trees (used in GetUpdateTreesResponse for backwards compatibility) all party keys used as wildcard filters, and all subtrees whose root has one of the listed parties as an informee are returned. If there are CumulativeFilters, those will control returned CreatedEvent fields where applicable, but will not be used for template/interface filtering. 2. For ledger-effects create and exercise events are returned, for which the witnesses include at least one of the listed parties and match the per-party filter. 3. For transaction and active-contract-set streams create and archive events are returned for all contracts whose stakeholders include at least one of the listed parties and match the per-party filter.
request.filter.filtersForAnyParty?{ cumulative?: { identifierFilter?: { Empty: ...; } | { InterfaceFilter: ...; } | { TemplateFilter: ...; } | { WildcardFilter: ...; }; }[]; }Description Wildcard filters that apply to all the parties existing on the participant. The interpretation of the filters is the same with the per-party filter as described above.
request.filter.filtersForAnyParty.cumulative?{ identifierFilter?: { Empty: ...; } | { InterfaceFilter: ...; } | { TemplateFilter: ...; } | { WildcardFilter: ...; }; }[]Description Every filter in the cumulative list expands the scope of the resulting stream. Each interface, template or wildcard filter means additional events that will match the query. The impact of include_interface_view and include_created_event_blob fields in the filters will also be accumulated. A template or an interface SHOULD NOT appear twice in the accumulative field. A wildcard filter SHOULD NOT be defined more than once in the accumulative field. Optional, if no CumulativeFilter defined, the default of a single WildcardFilter with include_created_event_blob unset is used.
request.verbose?booleanDescription Provided for backwards compatibility, it will be removed in the Canton version 3.5.0. If enabled, values served over the API will contain more information than strictly necessary to interpret the data. In particular, setting the verbose flag to true triggers the ledger to include labels for record fields. Optional, if specified event_format must be unset.
options?{ limit?: number; }-
options.limit?number-
Returns​

Promise<{ contractEntry?: { JsActiveContract: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; reassignmentCounter: number; synchronizerId: string; }; } | { JsEmpty: Record<string, never>; } | { JsIncompleteAssigned: { assignedEvent: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: ...[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; reassignmentCounter: number; reassignmentId: string; source: string; submitter?: string; target: string; }; }; } | { JsIncompleteUnassigned: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; unassignedEvent: { assignmentExclusivity?: string; contractId: string; nodeId: number; offset: number; packageName: string; reassignmentCounter: number; reassignmentId: string; source: string; submitter?: string; target: string; templateId: string; witnessParties: string[]; }; }; }; workflowId?: string; }[]>

Array of active contracts matching the filter

getConnectedSynchronizers()​

getConnectedSynchronizers(): Promise<{ permission: "PARTICIPANT_PERMISSION_CONFIRMATION" | "PARTICIPANT_PERMISSION_OBSERVATION" | "PARTICIPANT_PERMISSION_SUBMISSION" | "PARTICIPANT_PERMISSION_UNSPECIFIED"; synchronizerAlias: string; synchronizerId: string; }[]>

Get the list of synchronizers the participant is currently connected to

Returns​

Promise<{ permission: "PARTICIPANT_PERMISSION_CONFIRMATION" | "PARTICIPANT_PERMISSION_OBSERVATION" | "PARTICIPANT_PERMISSION_SUBMISSION" | "PARTICIPANT_PERMISSION_UNSPECIFIED"; synchronizerAlias: string; synchronizerId: string; }[]>

getLedgerEnd()​

getLedgerEnd(): Promise<{ offset: number; }>

Get the current ledger end offset

Returns​

Promise<{ offset: number; }>

getParticipantId()​

getParticipantId(): Promise<string>

Get the participant ID

Returns​

Promise<string>

getTransactionById()​

getTransactionById(updateId: string): Promise<{ commandId?: string; effectiveAt: string; events: ({ ArchivedEvent: { contractId: string; implementedInterfaces?: string[]; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; } | { CreatedEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ... | ...; interfaceId: string; viewStatus: { code: ...; details?: ...; message: ...; }; viewValue?: unknown; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; } | { ExercisedEvent: { acsDelta: boolean; actingParties: string[]; choice: string; choiceArgument: unknown; consuming: boolean; contractId: string; exerciseResult: unknown; implementedInterfaces?: string[]; interfaceId?: string; lastDescendantNodeId: number; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; })[]; externalTransactionHash?: string; offset: number; recordTime: string; synchronizerId: string; traceContext?: { traceparent?: string; tracestate?: string; }; updateId: string; workflowId?: string; }>

Fetch a transaction by its update ID without requiring a known party. Uses filtersForAnyParty with a wildcard so all visible events are returned.

Parameters​
ParameterTypeDescription
updateIdstringThe update ID (Canton transaction hash)
Returns​

Promise<{ commandId?: string; effectiveAt: string; events: ({ ArchivedEvent: { contractId: string; implementedInterfaces?: string[]; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; } | { CreatedEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ... | ...; interfaceId: string; viewStatus: { code: ...; details?: ...; message: ...; }; viewValue?: unknown; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; } | { ExercisedEvent: { acsDelta: boolean; actingParties: string[]; choice: string; choiceArgument: unknown; consuming: boolean; contractId: string; exerciseResult: unknown; implementedInterfaces?: string[]; interfaceId?: string; lastDescendantNodeId: number; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; })[]; externalTransactionHash?: string; offset: number; recordTime: string; synchronizerId: string; traceContext?: { traceparent?: string; tracestate?: string; }; updateId: string; workflowId?: string; }>

The full JsTransaction including all events

getUpdateById()​

getUpdateById(updateId: string, party: string): Promise<unknown>

Get update by ID

Parameters​
ParameterTypeDescription
updateIdstringThe update ID returned from submit-and-wait
partystringThe party ID to filter events for
Returns​

Promise<unknown>

The full update with all events

isAlive()​

isAlive(): Promise<boolean>

Check if the ledger API is alive

Returns​

Promise<boolean>

isReady()​

isReady(): Promise<boolean>

Check if the ledger API is ready

Returns​

Promise<boolean>

listParties()​

listParties(options?: { filterParty?: string; }): Promise<unknown[] | undefined>

List known parties on the participant

Parameters​
ParameterType
options?{ filterParty?: string; }
options.filterParty?string
Returns​

Promise<unknown[] | undefined>

submitAndWait()​

submitAndWait(commands: { actAs: string[]; commandId: string; commands: ({ CreateAndExerciseCommand: { choice: string; choiceArgument: unknown; createArguments: unknown; templateId: string; }; } | { CreateCommand: { createArguments: unknown; templateId: string; }; } | { ExerciseByKeyCommand: { choice: string; choiceArgument: unknown; contractKey: unknown; templateId: string; }; } | { ExerciseCommand: { choice: string; choiceArgument: unknown; contractId: string; templateId: string; }; })[]; deduplicationPeriod?: { DeduplicationDuration: { value: { nanos: number; seconds: number; unknownFields?: { fields: {[key: string]: { fixed32?: ... | ...; fixed64?: ... | ...; lengthDelimited?: ... | ...; varint?: ... | ...; }; }; }; }; }; } | { DeduplicationOffset: { value: number; }; } | { Empty: Record<string, never>; }; disclosedContracts?: { contractId?: string; createdEventBlob: string; synchronizerId?: string; templateId?: string; }[]; minLedgerTimeAbs?: string; minLedgerTimeRel?: { nanos: number; seconds: number; unknownFields?: { fields: {[key: string]: { fixed32?: number[]; fixed64?: number[]; lengthDelimited?: string[]; varint?: number[]; }; }; }; }; packageIdSelectionPreference?: string[]; prefetchContractKeys?: { contractKey: unknown; templateId: string; }[]; readAs?: string[]; submissionId?: string; synchronizerId?: string; userId?: string; workflowId?: string; }): Promise<{ completionOffset: number; updateId: string; }>

Submit a command and wait for completion

Parameters​
ParameterTypeDescription
commands{ actAs: string[]; commandId: string; commands: ({ CreateAndExerciseCommand: { choice: string; choiceArgument: unknown; createArguments: unknown; templateId: string; }; } | { CreateCommand: { createArguments: unknown; templateId: string; }; } | { ExerciseByKeyCommand: { choice: string; choiceArgument: unknown; contractKey: unknown; templateId: string; }; } | { ExerciseCommand: { choice: string; choiceArgument: unknown; contractId: string; templateId: string; }; })[]; deduplicationPeriod?: { DeduplicationDuration: { value: { nanos: number; seconds: number; unknownFields?: { fields: {[key: string]: { fixed32?: ... | ...; fixed64?: ... | ...; lengthDelimited?: ... | ...; varint?: ... | ...; }; }; }; }; }; } | { DeduplicationOffset: { value: number; }; } | { Empty: Record<string, never>; }; disclosedContracts?: { contractId?: string; createdEventBlob: string; synchronizerId?: string; templateId?: string; }[]; minLedgerTimeAbs?: string; minLedgerTimeRel?: { nanos: number; seconds: number; unknownFields?: { fields: {[key: string]: { fixed32?: number[]; fixed64?: number[]; lengthDelimited?: string[]; varint?: number[]; }; }; }; }; packageIdSelectionPreference?: string[]; prefetchContractKeys?: { contractKey: unknown; templateId: string; }[]; readAs?: string[]; submissionId?: string; synchronizerId?: string; userId?: string; workflowId?: string; }-
commands.actAsstring[]Description Set of parties on whose behalf the command should be executed. If ledger API authorization is enabled, then the authorization metadata must authorize the sender of the request to act on behalf of each of the given parties. Each element must be a valid PartyIdString (as described in value.proto). Required, must be non-empty.
commands.commandIdstringDescription Uniquely identifies the command. The triple (user_id, act_as, command_id) constitutes the change ID for the intended ledger change, where act_as is interpreted as a set of party names. The change ID can be used for matching the intended ledger changes with all their completions. Must be a valid LedgerString (as described in value.proto). Required
commands.commands({ CreateAndExerciseCommand: { choice: string; choiceArgument: unknown; createArguments: unknown; templateId: string; }; } | { CreateCommand: { createArguments: unknown; templateId: string; }; } | { ExerciseByKeyCommand: { choice: string; choiceArgument: unknown; contractKey: unknown; templateId: string; }; } | { ExerciseCommand: { choice: string; choiceArgument: unknown; contractId: string; templateId: string; }; })[]Description Individual elements of this atomic command. Must be non-empty. Required
commands.deduplicationPeriod?{ DeduplicationDuration: { value: { nanos: number; seconds: number; unknownFields?: { fields: {[key: string]: { fixed32?: ... | ...; fixed64?: ... | ...; lengthDelimited?: ... | ...; varint?: ... | ...; }; }; }; }; }; } | { DeduplicationOffset: { value: number; }; } | { Empty: Record<string, never>; }-
commands.disclosedContracts?{ contractId?: string; createdEventBlob: string; synchronizerId?: string; templateId?: string; }[]Description Additional contracts used to resolve contract & contract key lookups. Optional
commands.minLedgerTimeAbs?stringDescription Lower bound for the ledger time assigned to the resulting transaction. Note: The ledger time of a transaction is assigned as part of command interpretation. Use this property if you expect that command interpretation will take a considerate amount of time, such that by the time the resulting transaction is sequenced, its assigned ledger time is not valid anymore. Must not be set at the same time as min_ledger_time_rel. Optional
commands.minLedgerTimeRel?{ nanos: number; seconds: number; unknownFields?: { fields: {[key: string]: { fixed32?: number[]; fixed64?: number[]; lengthDelimited?: string[]; varint?: number[]; }; }; }; }Description Same as min_ledger_time_abs, but specified as a duration, starting from the time the command is received by the server. Must not be set at the same time as min_ledger_time_abs. Optional
commands.minLedgerTimeRel.nanosnumberFormat: int32
commands.minLedgerTimeRel.secondsnumberFormat: int64
commands.minLedgerTimeRel.unknownFields?{ fields: {[key: string]: { fixed32?: number[]; fixed64?: number[]; lengthDelimited?: string[]; varint?: number[]; }; }; }Description This field is automatically added as part of protobuf to json mapping
commands.minLedgerTimeRel.unknownFields.fields{[key: string]: { fixed32?: number[]; fixed64?: number[]; lengthDelimited?: string[]; varint?: number[]; }; }-
commands.packageIdSelectionPreference?string[]Description The package-id selection preference of the client for resolving package names and interface instances in command submission and interpretation
commands.prefetchContractKeys?{ contractKey: unknown; templateId: string; }[]Description Fetches the contract keys into the caches to speed up the command processing. Should only contain contract keys that are expected to be resolved during interpretation of the commands. Keys of disclosed contracts do not need prefetching. Optional
commands.readAs?string[]Description Set of parties on whose behalf (in addition to all parties listed in act_as) contracts can be retrieved. This affects Daml operations such as fetch, fetchByKey, lookupByKey, exercise, and exerciseByKey. Note: A participant node of a Daml network can host multiple parties. Each contract present on the participant node is only visible to a subset of these parties. A command can only use contracts that are visible to at least one of the parties in act_as or read_as. This visibility check is independent from the Daml authorization rules for fetch operations. If ledger API authorization is enabled, then the authorization metadata must authorize the sender of the request to read contract data on behalf of each of the given parties. Optional
commands.submissionId?stringDescription A unique identifier to distinguish completions for different submissions with the same change ID. Typically a random UUID. Applications are expected to use a different UUID for each retry of a submission with the same change ID. Must be a valid LedgerString (as described in value.proto). If omitted, the participant or the committer may set a value of their choice. Optional
commands.synchronizerId?stringDescription Must be a valid synchronizer id Optional
commands.userId?stringDescription Uniquely identifies the participant user that issued the command. Must be a valid UserIdString (as described in value.proto). Required unless authentication is used with a user token. In that case, the token's user-id will be used for the request's user_id.
commands.workflowId?stringDescription Identifier of the on-ledger workflow that this command is a part of. Must be a valid LedgerString (as described in value.proto). Optional
Returns​

Promise<{ completionOffset: number; updateId: string; }>

The update ID and completion offset

submitAndWaitForTransaction()​

submitAndWaitForTransaction(commands: { actAs: string[]; commandId: string; commands: ({ CreateAndExerciseCommand: { choice: string; choiceArgument: unknown; createArguments: unknown; templateId: string; }; } | { CreateCommand: { createArguments: unknown; templateId: string; }; } | { ExerciseByKeyCommand: { choice: string; choiceArgument: unknown; contractKey: unknown; templateId: string; }; } | { ExerciseCommand: { choice: string; choiceArgument: unknown; contractId: string; templateId: string; }; })[]; deduplicationPeriod?: { DeduplicationDuration: { value: { nanos: number; seconds: number; unknownFields?: { fields: {[key: string]: { fixed32?: ... | ...; fixed64?: ... | ...; lengthDelimited?: ... | ...; varint?: ... | ...; }; }; }; }; }; } | { DeduplicationOffset: { value: number; }; } | { Empty: Record<string, never>; }; disclosedContracts?: { contractId?: string; createdEventBlob: string; synchronizerId?: string; templateId?: string; }[]; minLedgerTimeAbs?: string; minLedgerTimeRel?: { nanos: number; seconds: number; unknownFields?: { fields: {[key: string]: { fixed32?: number[]; fixed64?: number[]; lengthDelimited?: string[]; varint?: number[]; }; }; }; }; packageIdSelectionPreference?: string[]; prefetchContractKeys?: { contractKey: unknown; templateId: string; }[]; readAs?: string[]; submissionId?: string; synchronizerId?: string; userId?: string; workflowId?: string; }, eventFormat?: { filtersByParty?: {[key: string]: { cumulative?: { identifierFilter?: { Empty: ...; } | { InterfaceFilter: ...; } | { TemplateFilter: ...; } | { WildcardFilter: ...; }; }[]; }; }; filtersForAnyParty?: { cumulative?: { identifierFilter?: { Empty: Record<..., ...>; } | { InterfaceFilter: { value?: ...; }; } | { TemplateFilter: { value?: ...; }; } | { WildcardFilter: { value?: ...; }; }; }[]; }; verbose?: boolean; }): Promise<{ transaction: { commandId?: string; effectiveAt: string; events: ({ ArchivedEvent: { contractId: string; implementedInterfaces?: string[]; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; } | { CreatedEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; } | { ExercisedEvent: { acsDelta: boolean; actingParties: string[]; choice: string; choiceArgument: unknown; consuming: boolean; contractId: string; exerciseResult: unknown; implementedInterfaces?: string[]; interfaceId?: string; lastDescendantNodeId: number; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; })[]; externalTransactionHash?: string; offset: number; recordTime: string; synchronizerId: string; traceContext?: { traceparent?: string; tracestate?: string; }; updateId: string; workflowId?: string; }; }>

Submit a command and wait for the full transaction response

Parameters​
ParameterTypeDescription
commands{ actAs: string[]; commandId: string; commands: ({ CreateAndExerciseCommand: { choice: string; choiceArgument: unknown; createArguments: unknown; templateId: string; }; } | { CreateCommand: { createArguments: unknown; templateId: string; }; } | { ExerciseByKeyCommand: { choice: string; choiceArgument: unknown; contractKey: unknown; templateId: string; }; } | { ExerciseCommand: { choice: string; choiceArgument: unknown; contractId: string; templateId: string; }; })[]; deduplicationPeriod?: { DeduplicationDuration: { value: { nanos: number; seconds: number; unknownFields?: { fields: {[key: string]: { fixed32?: ... | ...; fixed64?: ... | ...; lengthDelimited?: ... | ...; varint?: ... | ...; }; }; }; }; }; } | { DeduplicationOffset: { value: number; }; } | { Empty: Record<string, never>; }; disclosedContracts?: { contractId?: string; createdEventBlob: string; synchronizerId?: string; templateId?: string; }[]; minLedgerTimeAbs?: string; minLedgerTimeRel?: { nanos: number; seconds: number; unknownFields?: { fields: {[key: string]: { fixed32?: number[]; fixed64?: number[]; lengthDelimited?: string[]; varint?: number[]; }; }; }; }; packageIdSelectionPreference?: string[]; prefetchContractKeys?: { contractKey: unknown; templateId: string; }[]; readAs?: string[]; submissionId?: string; synchronizerId?: string; userId?: string; workflowId?: string; }-
commands.actAsstring[]Description Set of parties on whose behalf the command should be executed. If ledger API authorization is enabled, then the authorization metadata must authorize the sender of the request to act on behalf of each of the given parties. Each element must be a valid PartyIdString (as described in value.proto). Required, must be non-empty.
commands.commandId?stringDescription Uniquely identifies the command. The triple (user_id, act_as, command_id) constitutes the change ID for the intended ledger change, where act_as is interpreted as a set of party names. The change ID can be used for matching the intended ledger changes with all their completions. Must be a valid LedgerString (as described in value.proto). Required
commands.commands?({ CreateAndExerciseCommand: { choice: string; choiceArgument: unknown; createArguments: unknown; templateId: string; }; } | { CreateCommand: { createArguments: unknown; templateId: string; }; } | { ExerciseByKeyCommand: { choice: string; choiceArgument: unknown; contractKey: unknown; templateId: string; }; } | { ExerciseCommand: { choice: string; choiceArgument: unknown; contractId: string; templateId: string; }; })[]Description Individual elements of this atomic command. Must be non-empty. Required
commands.deduplicationPeriod?{ DeduplicationDuration: { value: { nanos: number; seconds: number; unknownFields?: { fields: {[key: string]: { fixed32?: ... | ...; fixed64?: ... | ...; lengthDelimited?: ... | ...; varint?: ... | ...; }; }; }; }; }; } | { DeduplicationOffset: { value: number; }; } | { Empty: Record<string, never>; }-
commands.disclosedContracts?{ contractId?: string; createdEventBlob: string; synchronizerId?: string; templateId?: string; }[]Description Additional contracts used to resolve contract & contract key lookups. Optional
commands.minLedgerTimeAbs?stringDescription Lower bound for the ledger time assigned to the resulting transaction. Note: The ledger time of a transaction is assigned as part of command interpretation. Use this property if you expect that command interpretation will take a considerate amount of time, such that by the time the resulting transaction is sequenced, its assigned ledger time is not valid anymore. Must not be set at the same time as min_ledger_time_rel. Optional
commands.minLedgerTimeRel?{ nanos: number; seconds: number; unknownFields?: { fields: {[key: string]: { fixed32?: number[]; fixed64?: number[]; lengthDelimited?: string[]; varint?: number[]; }; }; }; }Description Same as min_ledger_time_abs, but specified as a duration, starting from the time the command is received by the server. Must not be set at the same time as min_ledger_time_abs. Optional
commands.minLedgerTimeRel.nanos?numberFormat: int32
commands.minLedgerTimeRel.seconds?numberFormat: int64
commands.minLedgerTimeRel.unknownFields?{ fields: {[key: string]: { fixed32?: number[]; fixed64?: number[]; lengthDelimited?: string[]; varint?: number[]; }; }; }Description This field is automatically added as part of protobuf to json mapping
commands.minLedgerTimeRel.unknownFields.fields?{[key: string]: { fixed32?: number[]; fixed64?: number[]; lengthDelimited?: string[]; varint?: number[]; }; }-
commands.packageIdSelectionPreference?string[]Description The package-id selection preference of the client for resolving package names and interface instances in command submission and interpretation
commands.prefetchContractKeys?{ contractKey: unknown; templateId: string; }[]Description Fetches the contract keys into the caches to speed up the command processing. Should only contain contract keys that are expected to be resolved during interpretation of the commands. Keys of disclosed contracts do not need prefetching. Optional
commands.readAs?string[]Description Set of parties on whose behalf (in addition to all parties listed in act_as) contracts can be retrieved. This affects Daml operations such as fetch, fetchByKey, lookupByKey, exercise, and exerciseByKey. Note: A participant node of a Daml network can host multiple parties. Each contract present on the participant node is only visible to a subset of these parties. A command can only use contracts that are visible to at least one of the parties in act_as or read_as. This visibility check is independent from the Daml authorization rules for fetch operations. If ledger API authorization is enabled, then the authorization metadata must authorize the sender of the request to read contract data on behalf of each of the given parties. Optional
commands.submissionId?stringDescription A unique identifier to distinguish completions for different submissions with the same change ID. Typically a random UUID. Applications are expected to use a different UUID for each retry of a submission with the same change ID. Must be a valid LedgerString (as described in value.proto). If omitted, the participant or the committer may set a value of their choice. Optional
commands.synchronizerId?stringDescription Must be a valid synchronizer id Optional
commands.userId?stringDescription Uniquely identifies the participant user that issued the command. Must be a valid UserIdString (as described in value.proto). Required unless authentication is used with a user token. In that case, the token's user-id will be used for the request's user_id.
commands.workflowId?stringDescription Identifier of the on-ledger workflow that this command is a part of. Must be a valid LedgerString (as described in value.proto). Optional
eventFormat?{ filtersByParty?: {[key: string]: { cumulative?: { identifierFilter?: { Empty: ...; } | { InterfaceFilter: ...; } | { TemplateFilter: ...; } | { WildcardFilter: ...; }; }[]; }; }; filtersForAnyParty?: { cumulative?: { identifierFilter?: { Empty: Record<..., ...>; } | { InterfaceFilter: { value?: ...; }; } | { TemplateFilter: { value?: ...; }; } | { WildcardFilter: { value?: ...; }; }; }[]; }; verbose?: boolean; }-
eventFormat.filtersByParty?{[key: string]: { cumulative?: { identifierFilter?: { Empty: ...; } | { InterfaceFilter: ...; } | { TemplateFilter: ...; } | { WildcardFilter: ...; }; }[]; }; }Description Each key must be a valid PartyIdString (as described in value.proto). The interpretation of the filter depends on the transaction-shape being filtered: 1. For ledger-effects create and exercise events are returned, for which the witnesses include at least one of the listed parties and match the per-party filter. 2. For transaction and active-contract-set streams create and archive events are returned for all contracts whose stakeholders include at least one of the listed parties and match the per-party filter. Optional
eventFormat.filtersForAnyParty?{ cumulative?: { identifierFilter?: { Empty: Record<..., ...>; } | { InterfaceFilter: { value?: ...; }; } | { TemplateFilter: { value?: ...; }; } | { WildcardFilter: { value?: ...; }; }; }[]; }Description Wildcard filters that apply to all the parties existing on the participant. The interpretation of the filters is the same with the per-party filter as described above. Optional
eventFormat.filtersForAnyParty.cumulative?{ identifierFilter?: { Empty: Record<..., ...>; } | { InterfaceFilter: { value?: ...; }; } | { TemplateFilter: { value?: ...; }; } | { WildcardFilter: { value?: ...; }; }; }[]Description Every filter in the cumulative list expands the scope of the resulting stream. Each interface, template or wildcard filter means additional events that will match the query. The impact of include_interface_view and include_created_event_blob fields in the filters will also be accumulated. A template or an interface SHOULD NOT appear twice in the accumulative field. A wildcard filter SHOULD NOT be defined more than once in the accumulative field. Optional, if no CumulativeFilter defined, the default of a single WildcardFilter with include_created_event_blob unset is used.
eventFormat.verbose?booleanDescription If enabled, values served over the API will contain more information than strictly necessary to interpret the data. In particular, setting the verbose flag to true triggers the ledger to include labels for record fields. Optional
Returns​

Promise<{ transaction: { commandId?: string; effectiveAt: string; events: ({ ArchivedEvent: { contractId: string; implementedInterfaces?: string[]; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; } | { CreatedEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; } | { ExercisedEvent: { acsDelta: boolean; actingParties: string[]; choice: string; choiceArgument: unknown; consuming: boolean; contractId: string; exerciseResult: unknown; implementedInterfaces?: string[]; interfaceId?: string; lastDescendantNodeId: number; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; })[]; externalTransactionHash?: string; offset: number; recordTime: string; synchronizerId: string; traceContext?: { traceparent?: string; tracestate?: string; }; updateId: string; workflowId?: string; }; }>

The transaction with all created/archived events

tokenMetadataClient​

readonly tokenMetadataClient: { getInstrument: Promise<Instrument>; getRegistryInfo: Promise<GetRegistryInfoResponse>; listInstruments: Promise<ListInstrumentsResponse>; }

Defined in: canton/index.ts:96

getInstrument()​

getInstrument(instrumentId: string): Promise<Instrument>

Retrieve an instrument's metadata by its ID.

GET /registry/metadata/v1/instruments/{instrumentId}

Parameters​
ParameterType
instrumentIdstring
Returns​

Promise<Instrument>

getRegistryInfo()​

getRegistryInfo(): Promise<GetRegistryInfoResponse>

Get information about the registry, including supported APIs.

GET /registry/metadata/v1/info

Returns​

Promise<GetRegistryInfoResponse>

listInstruments()​

listInstruments(options?: ListInstrumentsOptions): Promise<ListInstrumentsResponse>

List all instruments managed by this instrument admin.

GET /registry/metadata/v1/instruments

Parameters​
ParameterType
options?ListInstrumentsOptions
Returns​

Promise<ListInstrumentsResponse>

transferInstructionClient​

readonly transferInstructionClient: { getAcceptContext: Promise<ChoiceContext>; getRejectContext: Promise<ChoiceContext>; getTransferFactory: Promise<TransferFactoryWithChoiceContext>; getWithdrawContext: Promise<ChoiceContext>; }

Defined in: canton/index.ts:95

getAcceptContext()​

getAcceptContext(transferInstructionId: string, request?: GetChoiceContextRequest): Promise<ChoiceContext>

Get the choice context to accept a transfer instruction.

POST /registry/transfer-instruction/v1/{transferInstructionId}/choice-contexts/accept

Parameters​
ParameterType
transferInstructionIdstring
request?GetChoiceContextRequest
Returns​

Promise<ChoiceContext>

getRejectContext()​

getRejectContext(transferInstructionId: string, request?: GetChoiceContextRequest): Promise<ChoiceContext>

Get the choice context to reject a transfer instruction.

POST /registry/transfer-instruction/v1/{transferInstructionId}/choice-contexts/reject

Parameters​
ParameterType
transferInstructionIdstring
request?GetChoiceContextRequest
Returns​

Promise<ChoiceContext>

getTransferFactory()​

getTransferFactory(request: GetFactoryRequest): Promise<TransferFactoryWithChoiceContext>

Get the factory and choice context for executing a direct transfer.

POST /registry/transfer-instruction/v1/transfer-factory

Parameters​
ParameterType
requestGetFactoryRequest
Returns​

Promise<TransferFactoryWithChoiceContext>

getWithdrawContext()​

getWithdrawContext(transferInstructionId: string, request?: GetChoiceContextRequest): Promise<ChoiceContext>

Get the choice context to withdraw a transfer instruction.

POST /registry/transfer-instruction/v1/{transferInstructionId}/choice-contexts/withdraw

Parameters​
ParameterType
transferInstructionIdstring
request?GetChoiceContextRequest
Returns​

Promise<ChoiceContext>

decimals​

readonly static decimals: 10 = 10

Defined in: canton/index.ts:89

Canton uses 10 decimals (lf-coin micro-units)

family​

readonly static family: "CANTON" = ChainFamily.Canton

Defined in: canton/index.ts:87

Methods​

destroy()?​

optional destroy(): void | Promise<void>

Defined in: chain.ts:598

Cleanup method to release resources (e.g., close connections).

Returns​

void | Promise<void>

Inherited from​

Chain.destroy

discoverSendArgs()​

discoverSendArgs(party: string): Promise<{ extraArgs: CantonExtraArgsV1; feeToken: string; }>

Defined in: canton/index.ts:1344

Auto-discover everything needed to call sendMessage for a simple Canton-to-EVM send.

This is a convenience wrapper over findFeeTokenHoldings and findCCVRawAddresses that queries the token metadata registry to determine the default fee token (Amulet), finds the first usable holding for party, and collects all CommitteeVerifier raw addresses visible to party.

Parameters​

ParameterTypeDescription
partystringThe sender party ID.

Returns​

Promise<{ extraArgs: CantonExtraArgsV1; feeToken: string; }>

The resolved feeToken string and a ready-to-use CantonExtraArgsV1.

Throws​

if no fee token holdings or no CCV contracts are found for party.

estimateReceiveExecution()?​

optional estimateReceiveExecution(opts: { message: { data?: BytesLike; destTokenAmounts?: readonly { token: string; } | { destTokenAddress: string; extraData?: string; } & { amount: bigint; }[]; messageId: string; receiver: string; sender?: string; sourceChainSelector: bigint; }; offRamp: string; } | { messageId: string; }): Promise<number>

Defined in: chain.ts:1790

Estimate ccipReceive execution cost (gas, computeUnits) for this destination chain.

Parameters​

ParameterTypeDescription
opts{ message: { data?: BytesLike; destTokenAmounts?: readonly { token: string; } | { destTokenAddress: string; extraData?: string; } & { amount: bigint; }[]; messageId: string; receiver: string; sender?: string; sourceChainSelector: bigint; }; offRamp: string; } | { messageId: string; }Either: - { offRamp, message } — estimate from message fields directly. message must include sourceChainSelector, messageId, receiver, and optionally sender, data, destTokenAmounts. - { messageId } — fetch the message from the CCIP API via getMessageById, resolve the offRamp from the message metadata or getExecutionInput, then estimate. Requires apiClient to be available.

Returns​

Promise<number>

Estimated execution cost (gas for EVM, compute units for Solana)

Inherited from​

Chain.estimateReceiveExecution

execute()​

execute(opts: ExecuteOpts & { wallet: unknown; }): Promise<CCIPExecution>

Defined in: canton/index.ts:984

Executes a CCIP message on Canton by:

  1. Validating the wallet as a CantonWallet.
  2. Building the unsigned command via generateUnsignedExecute.
  3. Submitting the command to the Canton Ledger API.
  4. Parsing the resulting transaction into a CCIPExecution.

Parameters​

ParameterType
optsExecuteOpts & { wallet: unknown; }

Returns​

Promise<CCIPExecution>

Throws​

CCIPWalletInvalidError if wallet is not a valid CantonWallet

Throws​

CCIPError if the Ledger API submission or result parsing fails

Overrides​

Chain.execute

findCCVRawAddresses()​

findCCVRawAddresses(party: string): Promise<string[]>

Defined in: canton/index.ts:1284

Discover CommitteeVerifier raw addresses from the Active Contract Set.

Queries the ACS for CommitteeVerifier contracts visible to the given party, extracts their instanceId and owner fields, and returns raw addresses in "instanceId@owner" format — ready for use in CantonExtraArgsV1.ccvRawAddresses.

Parameters​

ParameterTypeDescription
partystringThe party whose ACS to query (typically the CCIP owner party).

Returns​

Promise<string[]>

Array of raw addresses (e.g. "my-verifier@party::1220...")

findFeeTokenHoldings()​

findFeeTokenHoldings(party: string, instrumentId: { admin: string; id: string; }): Promise<{ amount: string; contractId: string; }[]>

Defined in: canton/index.ts:1206

Discover fee token holdings from the Active Contract Set.

Queries the ACS for contracts implementing the Splice HoldingV1 interface, filtered by owner party and instrument ID. Returns all matching non-locked, non-zero holdings.

Mirrors the Go findUsableHoldingForInstrument function.

Parameters​

ParameterTypeDescription
partystringThe owner party to match holdings against.
instrumentId{ admin: string; id: string; }Token instrument to match (admin + id).
instrumentId.adminstring-
instrumentId.idstring-

Returns​

Promise<{ amount: string; contractId: string; }[]>

Array of matching holdings with contractId and amount.

generateUnsignedExecute()​

generateUnsignedExecute(opts: ExecuteOpts & { payer: string; }): Promise<UnsignedCantonTx>

Defined in: canton/index.ts:844

Builds a Canton JsCommands payload that exercises the Execute choice on the caller's CCIPReceiver contract. The command includes:

  1. ACS disclosures – same-party contracts (PerPartyRouter, CCIPReceiver) fetched via AcsDisclosureProvider.
  2. EDS disclosures – cross-party contracts (OffRamp, GlobalConfig, TokenAdminRegistry, RMNRemote, CCVs) fetched via EdsDisclosureProvider.
  3. Choice argument – assembled from the encoded CCIP message, verification data, and the opaque choiceContextData returned by the EDS.

Parameters​

ParameterTypeDescription
optsExecuteOpts & { payer: string; }Must use the offRamp + input variant of ExecuteOpts. input must contain encodedMessage and verifications (CCIP v2.0). payer is the Daml party ID used for actAs.

Returns​

Promise<UnsignedCantonTx>

An UnsignedCantonTx wrapping the ready-to-submit JsCommands.

Overrides​

Chain.generateUnsignedExecute

generateUnsignedSendMessage()​

generateUnsignedSendMessage(opts: SendMessageOpts & { sender: string; }): Promise<UnsignedCantonTx>

Defined in: canton/index.ts:464

Generate unsigned txs for ccipSend'ing a message.

Parameters​

ParameterTypeDescription
optsSendMessageOpts & { sender: string; }SendMessageOpts with sender address

Returns​

Promise<UnsignedCantonTx>

Promise resolving to chain-family specific unsigned txs

Overrides​

Chain.generateUnsignedSendMessage

getBalance()​

getBalance(_opts: GetBalanceOpts): Promise<bigint>

Defined in: canton/index.ts:443

Query token balance for an address.

Parameters​

ParameterTypeDescription
_optsGetBalanceOptsBalance query options

Returns​

Promise<bigint>

Token balance information including raw and formatted values

Throws​

CCIPNotImplementedError always (not yet implemented for Canton)

Overrides​

Chain.getBalance

getBlockTimestamp()​

getBlockTimestamp(block: number | "finalized"): Promise<number>

Defined in: canton/index.ts:260

Fetch the timestamp of a given block.

Parameters​

ParameterTypeDescription
blocknumber | "finalized"Positive block number, negative finality depth, or 'finalized' tag

Returns​

Promise<number>

Promise resolving to timestamp of the block, in seconds

Throws​

CCIPNotImplementedError for numeric blocks (Canton ledger uses offsets, not block numbers)

Overrides​

Chain.getBlockTimestamp

getCommitStoreForOffRamp()​

getCommitStoreForOffRamp(offRamp: string): Promise<string>

Defined in: canton/index.ts:419

Chain.getCommitStoreForOffRamp

Parameters​

ParameterType
offRampstring

Returns​

Promise<string>

getExecutionInput()​

getExecutionInput(opts: { request: CCIPRequest; verifications: CCIPVerifications; } & Pick<LogFilter, "page">): Promise<ExecutionInput>

Defined in: chain.ts:852

Fetch input data needed for executing messages Should be called on the source instance

Parameters​

ParameterTypeDescription
opts{ request: CCIPRequest; verifications: CCIPVerifications; } & Pick<LogFilter, "page">getExecutionInput options containing request and verifications

Returns​

Promise<ExecutionInput>

input payload to be passed to execute

See​

execute - method to execute a message

Inherited from​

Chain.getExecutionInput

getExecutionReceipts()​

getExecutionReceipts(opts: { messageId?: string; offRamp: string; sourceChainSelector?: bigint; verifications?: CCIPVerifications; } & Pick<LogFilter, "page" | "startBlock" | "startTime" | "watch">): AsyncIterableIterator<CCIPExecution>

Defined in: chain.ts:1412

Default/generic implementation of getExecutionReceipts. Yields execution receipts for a given offRamp.

Parameters​

ParameterTypeDescription
opts{ messageId?: string; offRamp: string; sourceChainSelector?: bigint; verifications?: CCIPVerifications; } & Pick<LogFilter, "page" | "startBlock" | "startTime" | "watch">getExecutionReceipts options

Returns​

AsyncIterableIterator<CCIPExecution>

Async generator of CCIPExecution receipts

Example​

TypeScript
for await (const exec of dest.getExecutionReceipts({
  offRamp: offRampAddress,
  messageId: request.message.messageId,
  startBlock: commit.log.blockNumber,
})) {
  console.log(`State: ${exec.receipt.state}`)
  if (exec.receipt.state === ExecutionState.Success) break
}

Inherited from​

Chain.getExecutionReceipts

getFee()​

getFee(_opts: Omit<SendMessageOpts, "approveMax">): Promise<bigint>

Defined in: canton/index.ts:459

Fetch the current fee for a given intended message.

Parameters​

ParameterTypeDescription
_optsOmit<SendMessageOpts, "approveMax">SendMessageOpts without approveMax

Returns​

Promise<bigint>

Fee amount in the feeToken's smallest units

Throws​

CCIPNotImplementedError always (not yet implemented for Canton)

Overrides​

Chain.getFee

getFeeTokens()​

getFeeTokens(_router: string): Promise<Record<string, TokenInfo>>

Defined in: canton/index.ts:1187

Fetch list and info of supported feeTokens.

Parameters​

ParameterTypeDescription
_routerstringRouter address on this chain

Returns​

Promise<Record<string, TokenInfo>>

Promise resolving to mapping of token addresses to TokenInfo objects

Throws​

CCIPNotImplementedError always (not yet implemented for Canton)

Overrides​

Chain.getFeeTokens

getLaneFeatures()​

getLaneFeatures(_opts: { destChainSelector: bigint; router: string; token?: string; }): Promise<Partial<LaneFeatures>>

Defined in: chain.ts:1385

Retrieve features for a lane (router/destChainSelector/token triplet).

Parameters​

ParameterTypeDescription
_opts{ destChainSelector: bigint; router: string; token?: string; }Options containing router address, destChainSelector, and optional token address (the token to be transferred in a hypothetical message on this lane)
_opts.destChainSelectorbigint-
_opts.routerstring-
_opts.token?string-

Returns​

Promise<Partial<LaneFeatures>>

Promise resolving to partial lane features record

Throws​

CCIPNotImplementedError if not implemented for this chain family

Example​

TypeScript
const features = await chain.getLaneFeatures({
  router: '0x...',
  destChainSelector: 4949039107694359620n,
})
// FINALITY_FAST has three states:
// - undefined: FTF is not supported on this lane (pre-v2.0)
// - 0: the lane supports FTF, but it is not enabled for this token
// - > 0: FTF is enabled with this many block confirmations
const ftf = features[LaneFeature.FINALITY_FAST]
if (ftf != null && ftf > 0) {
  console.log(`FTF enabled with ${ftf} block confirmations`)
} else if (ftf === 0) {
  console.log('FTF supported on this lane but not enabled for this token')
}

Inherited from​

Chain.getLaneFeatures

getLaneLatency()​

getLaneLatency(destChainSelector: bigint, numberOfBlocks?: number): Promise<LaneLatencyResponse>

Defined in: chain.ts:1344

Fetches estimated lane latency to a destination chain. Uses this chain's selector as the source.

Parameters​

ParameterTypeDescription
destChainSelectorbigintDestination CCIP chain selector (bigint)
numberOfBlocks?numberOptional number of block confirmations to use for latency calculation. When omitted or 0, uses the lane's default finality. When provided as a positive integer, the API returns latency for that custom finality value.

Returns​

Promise<LaneLatencyResponse>

Promise resolving to LaneLatencyResponse containing:

  • totalMs - Estimated delivery time in milliseconds

Throws​

CCIPApiClientNotAvailableError if apiClient was disabled (set to null)

Throws​

CCIPHttpError if API request fails (network error, 4xx, 5xx status)

Remarks​

Each call makes a fresh API request. Consider caching results if making frequent calls for the same lane.

Examples​

TypeScript
const chain = await EVMChain.fromUrl('https://eth-mainnet.example.com')
try {
  const latency = await chain.getLaneLatency(4949039107694359620n) // Arbitrum
  console.log(`Estimated delivery: ${Math.round(latency.totalMs / 60000)} minutes`)
} catch (err) {
  if (err instanceof CCIPHttpError) {
    console.error(`API error: ${err.context.apiErrorCode}`)
  }
}
TypeScript
const latency = await chain.getLaneLatency(4949039107694359620n, 10)
console.log(`Latency with 10 confirmations: ${Math.round(latency.totalMs / 60000)} minutes`)

Inherited from​

Chain.getLaneLatency

getLogs()​

getLogs(_opts: LogFilter): AsyncIterableIterator<ChainLog>

Defined in: canton/index.ts:337

An async generator that yields logs based on the provided options.

Parameters​

ParameterTypeDescription
_optsLogFilterOptions object containing: - startBlock: fetch and generate logs forward starting from this block; required unless startTime is provided; explicit 0 is allowed - startTime: instead of a startBlock, a start timestamp may be provided; if either is provided, fetch logs forward from this starting point - endBlock: a fixed block height, finality tag or negative finality depth to stop iteration at; defaults to latest - endBefore: optional hint signature for end of iteration, instead of endBlock - address: if provided, fetch logs for this address only (may be required in some networks/implementations) - topics: if provided, fetch logs for these topics only; if string[], it's assumed to be a list of topic0s (i.e. string[] or string[][0], event_ids); some networks/implementations may not be able to filter topics other than topic0s, so one may want to assume those are optimization hints, instead of hard filters, and verify results - page: if provided, try to use this page/range for batches - watch: true or cancellation promise, stream logs after initial catch-up until endBlock finality tag (e.g. 'finalized'); requires endBlock to be a finality tag

Returns​

AsyncIterableIterator<ChainLog>

An async iterable iterator of logs.

Throws​

CCIPNotImplementedError always (not yet implemented for Canton)

Overrides​

Chain.getLogs

getMessageById()​

getMessageById(messageId: string, _opts?: { onRamp?: string; page?: number; }): Promise<CCIPRequest<CCIPVersion>>

Defined in: chain.ts:804

Fetch a CCIP message by its unique message ID.

Parameters​

ParameterTypeDescription
messageIdstringThe unique message ID (0x + 64 hex chars)
_opts?{ onRamp?: string; page?: number; }Optional: onRamp hint for non-EVM chains
_opts.onRamp?string-
_opts.page?number-

Returns​

Promise<CCIPRequest<CCIPVersion>>

CCIPRequest with metadata populated from API

Remarks​

Uses the CCIP API to retrieve message details. The returned request includes a metadata field with API-specific information.

Example​

TypeScript
const request = await chain.getMessageById(messageId)
console.log(`Sender: ${request.message.sender}`)

if (request.metadata) {
  console.log(`Status: ${request.metadata.status}`)
  if (request.metadata.deliveryTime) {
    console.log(`Delivered in ${request.metadata.deliveryTime}ms`)
  }
}

Throws​

CCIPApiClientNotAvailableError if API disabled

Throws​

CCIPMessageIdNotFoundError if message not found

Throws​

CCIPOnRampRequiredError if onRamp is required but not provided

Throws​

CCIPHttpError if API request fails

Inherited from​

Chain.getMessageById

getMessagesInBatch()​

getMessagesInBatch<R>(request: R, commit: Pick<CommitReport, "minSeqNr" | "maxSeqNr">, opts?: { page?: number; }): Promise<R["message"][]>

Defined in: canton/index.ts:344

Fetches all CCIP messages contained in a given commit batch. To be implemented for chains supporting CCIPVersion v1.6.0 and earlier

Type Parameters​

Type ParameterDescription
R extends { lane: { destChainSelector: bigint; onRamp: string; sourceChainSelector: bigint; version: CCIPVersion; }; log: { }; message: { sequenceNumber: bigint; } | { sequenceNumber: bigint; } | { sequenceNumber: bigint; } | { sequenceNumber: bigint; } | { sequenceNumber: bigint; } | { sequenceNumber: bigint; }; }

Parameters​

ParameterTypeDescription
requestRCCIPRequest to fetch batch for
commitPick<CommitReport, "minSeqNr" | "maxSeqNr">batch range { minSeqnr, maxSeqNr }, e.g. from CommitReport
opts?{ page?: number; }Optional parameters (e.g., page for pagination width)
opts.page?number-

Returns​

Promise<R["message"][]>

Array of messages in the batch

Overrides​

Chain.getMessagesInBatch

getMessagesInTx()​

getMessagesInTx(tx: string | ChainTransaction): Promise<CCIPRequest<CCIPVersion>[]>

Defined in: chain.ts:748

Fetch all CCIP requests in a transaction.

Parameters​

ParameterTypeDescription
txstring | ChainTransactionChainTransaction or txHash to fetch requests from

Returns​

Promise<CCIPRequest<CCIPVersion>[]>

Promise resolving to CCIP messages in the transaction (at least one)

Throws​

CCIPTransactionNotFoundError if transaction does not exist

Throws​

CCIPMessageNotFoundInTxError if no CCIPSendRequested events in tx

Example​

TypeScript
const chain = await EVMChain.fromUrl('https://eth-mainnet.example.com')
const requests = await chain.getMessagesInTx('0xabc123...')
for (const req of requests) {
  console.log(`Message ID: ${req.message.messageId}`)
}

Inherited from​

Chain.getMessagesInTx

getNativeTokenForRouter()​

getNativeTokenForRouter(_router: string): Promise<string>

Defined in: canton/index.ts:388

Get the native token address for a Router.

Parameters​

ParameterTypeDescription
_routerstringRouter contract address

Returns​

Promise<string>

Promise resolving to native token address (usually wrapped)

Throws​

CCIPNotImplementedError always (not yet implemented for Canton)

Overrides​

Chain.getNativeTokenForRouter

getOffchainTokenData()​

getOffchainTokenData(request: CCIPRequest): Promise<OffchainTokenData[]>

Defined in: canton/index.ts:821

Fetch supported offchain token data for a request from this network. It logs but doesn't throw in case it can't fetch attestation, as the transfers may not be from the expected attestation providers. It returns default offchainData=undefined for those.

Parameters​

ParameterTypeDescription
requestCCIPRequestCCIP request, with tx.hash and message

Returns​

Promise<OffchainTokenData[]>

Promise resolving to array with one offchain token data for each token transfer

Overrides​

Chain.getOffchainTokenData

getOffRampsForRouter()​

getOffRampsForRouter(_router: string, _sourceChainSelector: bigint): Promise<string[]>

Defined in: canton/index.ts:396

Fetch the OffRamps allowlisted in a Router. Used to discover OffRamp connected to an OnRamp.

Parameters​

ParameterTypeDescription
_routerstringRouter contract address
_sourceChainSelectorbigintSource chain selector

Returns​

Promise<string[]>

Promise resolving to array of OffRamp addresses

Throws​

CCIPNotImplementedError always (not yet implemented for Canton)

Overrides​

Chain.getOffRampsForRouter

getOnRampForRouter()​

getOnRampForRouter(_router: string, _destChainSelector: bigint): Promise<string>

Defined in: canton/index.ts:404

Fetch the OnRamp registered in a Router for a destination chain.

Parameters​

ParameterTypeDescription
_routerstringRouter contract address
_destChainSelectorbigintDestination chain selector

Returns​

Promise<string>

Promise resolving to OnRamp address

Throws​

CCIPNotImplementedError always (not yet implemented for Canton)

Overrides​

Chain.getOnRampForRouter

getOnRampsForOffRamp()​

getOnRampsForOffRamp(_offRamp: string, _sourceChainSelector: bigint): Promise<string[]>

Defined in: canton/index.ts:412

Fetch the OnRamps addresses set in OffRamp config. Used to discover OffRamp connected to an OnRamp.

Parameters​

ParameterTypeDescription
_offRampstringOffRamp contract address
_sourceChainSelectorbigintSource chain selector

Returns​

Promise<string[]>

Promise resolving to OnRamps addresses

Throws​

CCIPNotImplementedError always (not yet implemented for Canton)

Overrides​

Chain.getOnRampsForOffRamp

getRegistryTokenConfig()​

getRegistryTokenConfig(_registry: string, _token: string): Promise<RegistryTokenConfig>

Defined in: canton/index.ts:1160

Fetch token configuration from a TokenAdminRegistry.

Parameters​

ParameterTypeDescription
_registrystringTokenAdminRegistry contract address.
_tokenstringToken address to query.

Returns​

Promise<RegistryTokenConfig>

RegistryTokenConfig containing administrator and pool information.

Remarks​

The TokenAdminRegistry is a contract that tracks token administrators and their associated pools. Each token has an administrator who can update pool configurations.

Throws​

CCIPNotImplementedError always (not yet implemented for Canton)

Overrides​

Chain.getRegistryTokenConfig

getRouterForOffRamp()​

getRouterForOffRamp(_offRamp: string, _sourceChainSelector: bigint): Promise<string>

Defined in: canton/index.ts:380

Fetch the Router address set in OffRamp config.

Parameters​

ParameterTypeDescription
_offRampstringOffRamp contract address
_sourceChainSelectorbigintSource chain selector

Returns​

Promise<string>

Promise resolving to Router address

Throws​

CCIPNotImplementedError always (not yet implemented for Canton)

Overrides​

Chain.getRouterForOffRamp

getRouterForOnRamp()​

getRouterForOnRamp(_onRamp: string, _destChainSelector: bigint): Promise<string>

Defined in: canton/index.ts:371

Fetch the Router address set in OnRamp config. Used to discover OffRamp connected to OnRamp.

Parameters​

ParameterTypeDescription
_onRampstringOnRamp contract address
_destChainSelectorbigintDestination chain selector

Returns​

Promise<string>

Promise resolving to Router address

Throws​

CCIPNotImplementedError always (not yet implemented for Canton)

Overrides​

Chain.getRouterForOnRamp

getSupportedTokens()​

getSupportedTokens(_address: string, _opts?: { page?: number; }): Promise<string[]>

Defined in: canton/index.ts:1152

List tokens supported by given TokenAdminRegistry contract.

Parameters​

ParameterTypeDescription
_addressstringUsually TokenAdminRegistry, but chain may support receiving Router, OnRamp, etc.
_opts?{ page?: number; }Optional parameters (e.g., page for pagination range)
_opts.page?number-

Returns​

Promise<string[]>

Promise resolving to array of supported token addresses

Throws​

CCIPNotImplementedError always (not yet implemented for Canton)

Overrides​

Chain.getSupportedTokens

getTokenAdminRegistryFor()​

getTokenAdminRegistryFor(_address: string): Promise<string>

Defined in: canton/index.ts:451

Fetch TokenAdminRegistry configured in a given OnRamp, Router, etc. Needed to map a source token to its dest counterparts.

Parameters​

ParameterTypeDescription
_addressstringContract address (OnRamp, Router, etc.)

Returns​

Promise<string>

Promise resolving to TokenAdminRegistry address

Throws​

CCIPNotImplementedError always (not yet implemented for Canton)

Overrides​

Chain.getTokenAdminRegistryFor

getTokenForTokenPool()​

getTokenForTokenPool(_tokenPool: string): Promise<string>

Defined in: canton/index.ts:427

Fetch the TokenPool's token/mint.

Parameters​

ParameterTypeDescription
_tokenPoolstringTokenPool address

Returns​

Promise<string>

Promise resolving to token or mint address

Throws​

CCIPNotImplementedError always (not yet implemented for Canton)

Overrides​

Chain.getTokenForTokenPool

getTokenInfo()​

getTokenInfo(_token: string): Promise<{ decimals: number; symbol: string; }>

Defined in: canton/index.ts:435

Fetch token metadata.

Parameters​

ParameterTypeDescription
_tokenstringToken address

Returns​

Promise<{ decimals: number; symbol: string; }>

Promise resolving to token symbol, decimals, and optionally name

Throws​

CCIPNotImplementedError always (not yet implemented for Canton)

Overrides​

Chain.getTokenInfo

getTokenPoolConfig()​

getTokenPoolConfig(_tokenPool: string): Promise<TokenPoolConfig>

Defined in: canton/index.ts:1168

Fetch configuration of a token pool.

Parameters​

ParameterTypeDescription
_tokenPoolstringToken pool contract address.

Returns​

Promise<TokenPoolConfig>

TokenPoolConfig containing token, router, version info, and optionally fee config.

Remarks​

Return type varies by chain:

  • EVM: typeAndVersion is always present (required)
  • Solana: Includes extra tokenPoolProgram field
  • Aptos: Standard fields only
  • Sui/TON: Throws CCIPNotImplementedError

Throws​

CCIPNotImplementedError always (not yet implemented for Canton)

Overrides​

Chain.getTokenPoolConfig

getTokenPoolRemote()​

getTokenPoolRemote(tokenPool: string, remoteChainSelector: bigint): Promise<TokenPoolRemote>

Defined in: chain.ts:1615

Fetch remote chain configuration for a token pool for a specific destination.

Parameters​

ParameterTypeDescription
tokenPoolstringToken pool address on the current chain.
remoteChainSelectorbigintChain selector of the desired remote chain.

Returns​

Promise<TokenPoolRemote>

TokenPoolRemote config for the specified remote chain.

Remarks​

Convenience wrapper around getTokenPoolRemotes that returns a single configuration instead of a Record. Use this when you need configuration for a specific destination chain.

Example​

TypeScript
const arbitrumSelector = 4949039107694359620n
const remote = await chain.getTokenPoolRemote(poolAddress, arbitrumSelector)
console.log(`Remote token: ${remote.remoteToken}`)
console.log(`Remote pools: ${remote.remotePools.join(', ')}`)

Throws​

CCIPTokenPoolChainConfigNotFoundError if no configuration found for the specified remote chain.

Inherited from​

Chain.getTokenPoolRemote

getTokenPoolRemotes()​

getTokenPoolRemotes(_tokenPool: string, _remoteChainSelector?: bigint): Promise<Record<string, TokenPoolRemote>>

Defined in: canton/index.ts:1176

Fetch remote chain configurations for a token pool.

Parameters​

ParameterTypeDescription
_tokenPoolstringToken pool address on the current chain.
_remoteChainSelector?bigintOptional chain selector to filter results to a single destination.

Returns​

Promise<Record<string, TokenPoolRemote>>

Record where keys are chain names (e.g., "ethereum-mainnet") and values are TokenPoolRemote configs.

Remarks​

A token pool maintains configurations for each destination chain it supports. The returned Record maps chain names to their respective configurations.

Throws​

CCIPNotImplementedError always (not yet implemented for Canton)

Overrides​

Chain.getTokenPoolRemotes

getTokenPrice()​

getTokenPrice(_opts: { router: string; timestamp?: number; token: string; }): Promise<TokenPrice>

Defined in: chain.ts:1774

Fetch the on-chain USD price of a token from the FeeQuoter or PriceRegistry.

Parameters​

ParameterType
_opts{ router: string; timestamp?: number; token: string; }
_opts.routerstring
_opts.timestamp?number
_opts.tokenstring

Returns​

Promise<TokenPrice>

Promise resolving to TokenPrice with the USD price per whole token.

Remarks​

On EVM, the price contract is resolved via the Router's OnRamp: PriceRegistry for v1.2/v1.5 lanes, FeeQuoter for v1.6+ lanes. When timestamp is provided on EVM, the price is read at the block closest to that timestamp (requires archive node). On Solana and Aptos, the FeeQuoter is resolved directly from the Router config; timestamp is not yet supported and will be ignored.

Throws​

CCIPNotImplementedError if not implemented for this chain family

Example​

TypeScript
const { price } = await chain.getTokenPrice({
  router: routerAddress,
  token: linkAddress,
})
console.log(`LINK: $${price.toFixed(2)}`)

Inherited from​

Chain.getTokenPrice

getTotalFeesEstimate()​

getTotalFeesEstimate(_opts: Omit<SendMessageOpts, "approveMax">): Promise<TotalFeesEstimate>

Defined in: chain.ts:1740

Estimate total fees for a cross-chain message.

Returns two components:

  • ccipFee: from Router.getFee(), denominated in the message's feeToken (native token if omitted). Includes gas, DON costs, and FeeQuoter-level token transfer overhead (all CCIP versions).
  • tokenTransferFee: pool-level BPS fee deducted from the transferred token amount (v2.0+ only). The recipient receives amount - feeDeducted on the destination chain. Absent on pre-v2.0 lanes or data-only messages.

Parameters​

ParameterTypeDescription
_optsOmit<SendMessageOpts, "approveMax">SendMessageOpts without approveMax

Returns​

Promise<TotalFeesEstimate>

Promise resolving to TotalFeesEstimate

Throws​

CCIPNotImplementedError if not implemented for this chain family

Inherited from​

Chain.getTotalFeesEstimate

getTransaction()​

getTransaction(hash: string): Promise<ChainTransaction>

Defined in: canton/index.ts:283

Fetches a Canton transaction (update) by its update ID.

The ledger is queried via /v2/updates/transaction-by-id with a wildcard party filter so that all visible events are returned without requiring a known party ID.

Canton concepts are mapped to ChainTransaction fields as follows:

  • hash — the Canton updateId
  • blockNumber — the ledger offset
  • timestamp — effectiveAt parsed to Unix seconds
  • from — first actingParties entry of the first exercised event
  • logs — one ChainLog per transaction event

Parameters​

ParameterTypeDescription
hashstringThe Canton update ID (transaction hash) to look up.

Returns​

Promise<ChainTransaction>

A ChainTransaction with events mapped to logs.

Overrides​

Chain.getTransaction

getVerifications()​

getVerifications(opts: { offRamp: string; request: { lane: { destChainSelector: bigint; onRamp: string; sourceChainSelector: bigint; version: CCIPVersion; }; message: { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; }; tx: { timestamp: number; }; }; } & Pick<LogFilter, "page" | "startBlock" | "watch">): Promise<CCIPVerifications>

Defined in: canton/index.ts:1086

Fetches CCV verification results for a CCIP message from the Canton indexer.

Parameters​

ParameterTypeDescription
opts{ offRamp: string; request: { lane: { destChainSelector: bigint; onRamp: string; sourceChainSelector: bigint; version: CCIPVersion; }; message: { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; } | { messageId: string; sequenceNumber: bigint; }; tx: { timestamp: number; }; }; } & Pick<LogFilter, "page" | "startBlock" | "watch">Options that should only include the CCIP request with the message ID to query.

Returns​

Promise<CCIPVerifications>

CCIPVerifications with verification policy and individual verifier results.

Overrides​

Chain.getVerifications

resolveExecuteOpts()​

protected resolveExecuteOpts(opts: ExecuteOpts): Promise<{ input: ExecutionInput; offRamp: string; } & { forceBuffer?: boolean; forceLookupTable?: boolean; gasLimit?: number; tokensGasLimit?: number; }>

Defined in: chain.ts:1166

Resolves ExecuteOpts that may contain a messageId (API shorthand) into the canonical { offRamp, input } form required by generateUnsignedExecute.

When opts already contains input the method is a no-op and returns it unchanged. When opts contains only a messageId it calls apiClient.getExecutionInput and merges the result back with any extra opts fields (e.g. gasLimit). If opts.gasLimit is undefined and estimateReceiveExecution is available, try to estimate gasLimitOverride

Parameters​

ParameterType
optsExecuteOpts

Returns​

Promise<{ input: ExecutionInput; offRamp: string; } & { forceBuffer?: boolean; forceLookupTable?: boolean; gasLimit?: number; tokensGasLimit?: number; }>

Throws​

CCIPApiClientNotAvailableError if messageId is provided but no apiClient

Inherited from​

Chain.resolveExecuteOpts

sendMessage()​

sendMessage(opts: SendMessageOpts & { wallet: unknown; }): Promise<CCIPRequest<CCIPVersion>>

Defined in: canton/index.ts:725

Send a CCIP message through a router using provided wallet.

Parameters​

ParameterTypeDescription
optsSendMessageOpts & { wallet: unknown; }SendMessageOpts with chain-specific wallet for signing

Returns​

Promise<CCIPRequest<CCIPVersion>>

Promise resolving to CCIP request with message details

Overrides​

Chain.sendMessage

typeAndVersion()​

typeAndVersion(_address: string): Promise<[string, string, string, string]>

Defined in: canton/index.ts:361

Fetch typeAndVersion for a given CCIP contract address.

Parameters​

ParameterTypeDescription
_addressstringCCIP contract address

Returns​

Promise<[string, string, string, string]>

Promise resolving to tuple:

  • type - Parsed type of the contract, e.g. OnRamp
  • version - Parsed version of the contract, e.g. 1.6.0
  • typeAndVersion - Original (unparsed) typeAndVersion() string
  • suffix - Suffix of the version, if any (e.g. -dev)

Throws​

CCIPNotImplementedError always (not yet implemented for Canton)

Overrides​

Chain.typeAndVersion

waitFinalized()​

waitFinalized(opts: { cancel$?: Promise<unknown>; finality?: number | "finalized"; request: { log: { tx?: { timestamp: number; }; }; tx?: { timestamp: number; }; }; }): Promise<true>

Defined in: chain.ts:664

Confirm a log tx is finalized or wait for it to be finalized.

Parameters​

ParameterTypeDescription
opts{ cancel$?: Promise<unknown>; finality?: number | "finalized"; request: { log: { tx?: { timestamp: number; }; }; tx?: { timestamp: number; }; }; }Options containing the request, finality level, and optional cancel promise
opts.cancel$?Promise<unknown>-
opts.finality?number | "finalized"-
opts.request{ log: { tx?: { timestamp: number; }; }; tx?: { timestamp: number; }; }-
opts.request.log{ tx?: { timestamp: number; }; }-
opts.request.log.tx?{ timestamp: number; }Optional reference to the containing transaction.
opts.request.log.tx.timestampnumberUnix timestamp of the block.
opts.request.tx?{ timestamp: number; }Transaction that emitted the request.
opts.request.tx.timestampnumberUnix timestamp of the block.

Returns​

Promise<true>

true when the transaction is finalized

Throws​

CCIPTransactionNotFinalizedError if the transaction is not included (e.g., due to a reorg)

Example​

TypeScript
const request = await source.getMessagesInTx(txHash)
try {
  await source.waitFinalized({ request: request[0] })
  console.log('Transaction finalized')
} catch (err) {
  if (err instanceof CCIPTransactionNotFinalizedError) {
    console.log('Transaction not yet finalized')
  }
}

Inherited from​

Chain.waitFinalized

buildMessageForDest()​

static buildMessageForDest(message: MessageInput): AnyMessage

Defined in: canton/index.ts:1458

Build a message targeted at this Canton destination chain, populating missing fields.

Parameters​

ParameterType
messageMessageInput

Returns​

AnyMessage

Overrides​

Chain.buildMessageForDest

decodeCommits()​

static decodeCommits(_log: Pick<ChainLog, "data">, _lane?: Lane<CCIPVersion>): { maxSeqNr: bigint; merkleRoot: string; minSeqNr: bigint; onRampAddress: string; sourceChainSelector: bigint; }[] | undefined

Defined in: canton/index.ts:1410

Try to decode a commit report from a Canton log.

Parameters​

ParameterType
_logPick<ChainLog, "data">
_lane?Lane<CCIPVersion>

Returns​

{ maxSeqNr: bigint; merkleRoot: string; minSeqNr: bigint; onRampAddress: string; sourceChainSelector: bigint; }[] | undefined

undefined (Canton commit format not yet supported)

decodeExtraArgs()​

static decodeExtraArgs(_extraArgs: BytesLike): undefined

Defined in: canton/index.ts:1393

Try to decode extra args serialized for Canton.

Parameters​

ParameterType
_extraArgsBytesLike

Returns​

undefined

undefined (Canton extra args format not yet supported)

decodeMessage()​

static decodeMessage(_log: Pick<ChainLog, "data">): CCIPMessage | undefined

Defined in: canton/index.ts:1384

Try to decode a CCIP message from a Canton log/event.

Parameters​

ParameterType
_logPick<ChainLog, "data">

Returns​

CCIPMessage | undefined

undefined (Canton message format not yet supported)

decodeReceipt()​

static decodeReceipt(_log: Pick<ChainLog, "data">): ExecutionReceipt | undefined

Defined in: canton/index.ts:1419

Try to decode an execution receipt from a Canton log.

Parameters​

ParameterType
_logPick<ChainLog, "data">

Returns​

ExecutionReceipt | undefined

undefined (Canton receipt format not yet supported)

encodeExtraArgs()​

static encodeExtraArgs(_extraArgs: ExtraArgs): string

Defined in: canton/index.ts:1402

Encode extraArgs for Canton.

Parameters​

ParameterType
_extraArgsExtraArgs

Returns​

string

Throws​

CCIPNotImplementedError always (not yet implemented for Canton)

fromClient()​

static fromClient(client: { getActiveContracts: Promise<{ contractEntry?: { JsActiveContract: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; reassignmentCounter: number; synchronizerId: string; }; } | { JsEmpty: Record<string, never>; } | { JsIncompleteAssigned: { assignedEvent: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: ...[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; reassignmentCounter: number; reassignmentId: string; source: string; submitter?: string; target: string; }; }; } | { JsIncompleteUnassigned: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; unassignedEvent: { assignmentExclusivity?: string; contractId: string; nodeId: number; offset: number; packageName: string; reassignmentCounter: number; reassignmentId: string; source: string; submitter?: string; target: string; templateId: string; witnessParties: string[]; }; }; }; workflowId?: string; }[]>; getConnectedSynchronizers: Promise<{ permission: "PARTICIPANT_PERMISSION_CONFIRMATION" | "PARTICIPANT_PERMISSION_OBSERVATION" | "PARTICIPANT_PERMISSION_SUBMISSION" | "PARTICIPANT_PERMISSION_UNSPECIFIED"; synchronizerAlias: string; synchronizerId: string; }[]>; getLedgerEnd: Promise<{ offset: number; }>; getParticipantId: Promise<string>; getTransactionById: Promise<{ commandId?: string; effectiveAt: string; events: ({ ArchivedEvent: { contractId: string; implementedInterfaces?: string[]; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; } | { CreatedEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ... | ...; interfaceId: string; viewStatus: { code: ...; details?: ...; message: ...; }; viewValue?: unknown; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; } | { ExercisedEvent: { acsDelta: boolean; actingParties: string[]; choice: string; choiceArgument: unknown; consuming: boolean; contractId: string; exerciseResult: unknown; implementedInterfaces?: string[]; interfaceId?: string; lastDescendantNodeId: number; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; })[]; externalTransactionHash?: string; offset: number; recordTime: string; synchronizerId: string; traceContext?: { traceparent?: string; tracestate?: string; }; updateId: string; workflowId?: string; }>; getUpdateById: Promise<unknown>; isAlive: Promise<boolean>; isReady: Promise<boolean>; listParties: Promise<unknown[] | undefined>; submitAndWait: Promise<{ completionOffset: number; updateId: string; }>; submitAndWaitForTransaction: Promise<{ transaction: { commandId?: string; effectiveAt: string; events: ({ ArchivedEvent: { contractId: string; implementedInterfaces?: string[]; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; } | { CreatedEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; } | { ExercisedEvent: { acsDelta: boolean; actingParties: string[]; choice: string; choiceArgument: unknown; consuming: boolean; contractId: string; exerciseResult: unknown; implementedInterfaces?: string[]; interfaceId?: string; lastDescendantNodeId: number; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; })[]; externalTransactionHash?: string; offset: number; recordTime: string; synchronizerId: string; traceContext?: { traceparent?: string; tracestate?: string; }; updateId: string; workflowId?: string; }; }>; }, acsDisclosureProvider: AcsDisclosureProvider, edsDisclosureProvider: EdsDisclosureProvider, transferInstructionClient: { getAcceptContext: Promise<ChoiceContext>; getRejectContext: Promise<ChoiceContext>; getTransferFactory: Promise<TransferFactoryWithChoiceContext>; getWithdrawContext: Promise<ChoiceContext>; }, tokenMetadataClient: { getInstrument: Promise<Instrument>; getRegistryInfo: Promise<GetRegistryInfoResponse>; listInstruments: Promise<ListInstrumentsResponse>; }, ccipParty: string, indexerUrl?: string, ctx?: ChainContext): Promise<CantonChain>

Defined in: canton/index.ts:163

Detect the Canton network and instantiate a CantonChain.

Network detection works by querying the connected synchronizers via /v2/state/connected-synchronizers and matching the synchronizerAlias of the first recognised synchronizer against the known Canton chain names.

Parameters​

ParameterTypeDefault value
client{ getActiveContracts: Promise<{ contractEntry?: { JsActiveContract: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; reassignmentCounter: number; synchronizerId: string; }; } | { JsEmpty: Record<string, never>; } | { JsIncompleteAssigned: { assignedEvent: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: ...[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; reassignmentCounter: number; reassignmentId: string; source: string; submitter?: string; target: string; }; }; } | { JsIncompleteUnassigned: { createdEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; unassignedEvent: { assignmentExclusivity?: string; contractId: string; nodeId: number; offset: number; packageName: string; reassignmentCounter: number; reassignmentId: string; source: string; submitter?: string; target: string; templateId: string; witnessParties: string[]; }; }; }; workflowId?: string; }[]>; getConnectedSynchronizers: Promise<{ permission: "PARTICIPANT_PERMISSION_CONFIRMATION" | "PARTICIPANT_PERMISSION_OBSERVATION" | "PARTICIPANT_PERMISSION_SUBMISSION" | "PARTICIPANT_PERMISSION_UNSPECIFIED"; synchronizerAlias: string; synchronizerId: string; }[]>; getLedgerEnd: Promise<{ offset: number; }>; getParticipantId: Promise<string>; getTransactionById: Promise<{ commandId?: string; effectiveAt: string; events: ({ ArchivedEvent: { contractId: string; implementedInterfaces?: string[]; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; } | { CreatedEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ... | ...; interfaceId: string; viewStatus: { code: ...; details?: ...; message: ...; }; viewValue?: unknown; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; } | { ExercisedEvent: { acsDelta: boolean; actingParties: string[]; choice: string; choiceArgument: unknown; consuming: boolean; contractId: string; exerciseResult: unknown; implementedInterfaces?: string[]; interfaceId?: string; lastDescendantNodeId: number; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; })[]; externalTransactionHash?: string; offset: number; recordTime: string; synchronizerId: string; traceContext?: { traceparent?: string; tracestate?: string; }; updateId: string; workflowId?: string; }>; getUpdateById: Promise<unknown>; isAlive: Promise<boolean>; isReady: Promise<boolean>; listParties: Promise<unknown[] | undefined>; submitAndWait: Promise<{ completionOffset: number; updateId: string; }>; submitAndWaitForTransaction: Promise<{ transaction: { commandId?: string; effectiveAt: string; events: ({ ArchivedEvent: { contractId: string; implementedInterfaces?: string[]; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; } | { CreatedEvent: { acsDelta: boolean; contractId: string; contractKey?: unknown; createArgument: unknown; createdAt: string; createdEventBlob?: string; interfaceViews?: { implementationPackageId?: ...; interfaceId: ...; viewStatus: ...; viewValue?: ...; }[]; nodeId: number; observers: string[]; offset: number; packageName: string; representativePackageId: string; signatories: string[]; templateId: string; witnessParties: string[]; }; } | { ExercisedEvent: { acsDelta: boolean; actingParties: string[]; choice: string; choiceArgument: unknown; consuming: boolean; contractId: string; exerciseResult: unknown; implementedInterfaces?: string[]; interfaceId?: string; lastDescendantNodeId: number; nodeId: number; offset: number; packageName: string; templateId: string; witnessParties: string[]; }; })[]; externalTransactionHash?: string; offset: number; recordTime: string; synchronizerId: string; traceContext?: { traceparent?: string; tracestate?: string; }; updateId: string; workflowId?: string; }; }>; }undefined
client.getActiveContractsundefined
client.getConnectedSynchronizersundefined
client.getLedgerEndundefined
client.getParticipantIdundefined
client.getTransactionByIdundefined
client.getUpdateByIdundefined
client.isAliveundefined
client.isReady?undefined
client.listParties?undefined
client.submitAndWait?undefined
client.submitAndWaitForTransaction?undefined
acsDisclosureProvider?AcsDisclosureProviderundefined
edsDisclosureProvider?EdsDisclosureProviderundefined
transferInstructionClient?{ getAcceptContext: Promise<ChoiceContext>; getRejectContext: Promise<ChoiceContext>; getTransferFactory: Promise<TransferFactoryWithChoiceContext>; getWithdrawContext: Promise<ChoiceContext>; }undefined
transferInstructionClient.getAcceptContext?undefined
transferInstructionClient.getRejectContext?undefined
transferInstructionClient.getTransferFactory?undefined
transferInstructionClient.getWithdrawContext?undefined
tokenMetadataClient?{ getInstrument: Promise<Instrument>; getRegistryInfo: Promise<GetRegistryInfoResponse>; listInstruments: Promise<ListInstrumentsResponse>; }undefined
tokenMetadataClient.getInstrument?undefined
tokenMetadataClient.getRegistryInfo?undefined
tokenMetadataClient.listInstruments?undefined
ccipParty?stringundefined
indexerUrl?stringCCV_INDEXER_URL
ctx?ChainContextundefined

Returns​

Promise<CantonChain>

Throws​

CCIPChainNotFoundError if no connected synchronizer alias maps to a known Canton chain

fromUrl()​

static fromUrl(url: string, ctx?: ChainContext): Promise<CantonChain>

Defined in: canton/index.ts:212

Creates a CantonChain instance from a Canton Ledger JSON API URL. Verifies the connection and detects the network.

Parameters​

ParameterTypeDescription
urlstringBase URL for the Canton Ledger JSON API (e.g., http://localhost:7575).
ctx?ChainContextContext containing logger.

Returns​

Promise<CantonChain>

A new CantonChain instance.

Throws​

CCIPHttpError if connection to the Canton Ledger JSON API fails

Throws​

CCIPNotImplementedError if Canton network detection is not yet implemented

getAddress()​

static getAddress(bytes: BytesLike): string

Defined in: canton/index.ts:1431

Receive bytes and try to decode as a Canton address (Daml party ID or contract ID).

Parameters​

ParameterTypeDescription
bytesBytesLikeBytes or string to convert.

Returns​

string

Canton address string.

Throws​

CCIPNotImplementedError if bytes cannot be decoded as a Canton address

getDestLeafHasher()​

static getDestLeafHasher(_lane: Lane, _ctx?: WithLogger): LeafHasher

Defined in: canton/index.ts:1451

Gets the leaf hasher for Canton destination chains.

Parameters​

ParameterType
_laneLane
_ctx?WithLogger

Returns​

LeafHasher

Throws​

CCIPNotImplementedError always (not yet implemented for Canton)

isTxHash()​

static isTxHash(v: unknown): v is string

Defined in: canton/index.ts:1441

Validates a transaction (update) ID format for Canton. Canton update IDs are base64-encoded strings.

Parameters​

ParameterType
vunknown

Returns​

v is string