feat(sdk-coin-canton): Support Broadridge standing delegation response parsing

modules/sdk-coin-canton/src/lib/broadridgeSettlementAuthorizationBuilder.ts

@@ -172,6 +172,9 @@ export class BroadridgeSettlementAuthorizationBuilder extends CantonCommandBuild
             },
           };
     this.command(command);
+    const createArguments = operation === 'Create' ? params.choiceArgument ?? {} : {};
+    const client = typeof createArguments.client === 'string' ? createArguments.client : undefined;
+    const executor = typeof createArguments.executor === 'string' ? createArguments.executor : undefined;
     this._broadridge = {
       protocol: 'broadridge',
       standard: 'CIP-56',
@@ -182,7 +185,8 @@ export class BroadridgeSettlementAuthorizationBuilder extends CantonCommandBuild
       ...(operation !== 'Create' ? { choice: operation } : {}),
       role,
       actors: [...params.actAs],
-      ...(params.contractId ? { contractId: params.contractId } : {}),
+      ...(client ? { client } : {}),
+      ...(executor ? { executor } : {}),
       ...(params.requestCid ? { requestCid: params.requestCid } : {}),
       ...(params.agreementCid ? { agreementCid: params.agreementCid } : {}),
       ...(params.settlement ? { settlement: params.settlement } : {}),

modules/sdk-coin-canton/src/lib/clearSigning.ts

@@ -31,7 +31,7 @@ export interface DecodedCantonTransaction {
   choice?: string;
   /** Contract ID being exercised — present for ExerciseCommand only */
   contractId?: string;
-  /** Parties acting on this command — present for ExerciseCommand only */
+  /** Parties acting on this command — submitter actAs for CreateCommand, root acting parties for ExerciseCommand */
   actingParties?: string[];
 }
 

modules/sdk-coin-canton/src/lib/iface.ts

@@ -131,6 +131,8 @@ export interface BroadridgeProtocolDescriptor {
   choice?: string;
   role: 'client' | 'executor' | 'trading-party' | 'agreement' | 'request' | 'allocation';
   actors: string[];
+  client?: string;
+  executor?: string;
   contractId?: string;
   requestCid?: string;
   agreementCid?: string;
@@ -421,5 +423,5 @@ export interface CantonCommandInfo {
   argument: unknown;
   choice?: string; // ExerciseCommand only
   contractId?: string; // ExerciseCommand only
-  actingParties?: string[]; // ExerciseCommand only
+  actingParties?: string[]; // Submitter actAs for CreateCommand; root acting parties for ExerciseCommand
 }

modules/sdk-coin-canton/src/lib/utils.ts

@@ -791,6 +791,7 @@ export class Utils implements BaseUtils {
           entityName: createNode.templateId.entityName,
         },
         argument: this.damlValueToJson(createNode.argument),
+        actingParties: [...(decoded.metadata?.submitterInfo?.actAs ?? [])],
       };
     }
     if (nodeType.oneofKind === 'exercise') {

modules/sdk-coin-canton/test/resources.ts

@@ -503,3 +503,17 @@ export const TransferPreapprovalCancelPrepareResponse = {
   preparedTransactionHash: 'placeholder-hash-not-cryptographically-verified==',
   hashingSchemeVersion: 'HASHING_SCHEME_VERSION_V2',
 };
+
+export const CantonStandingDelegationPrepareResponse = {
+  preparedTransaction:
+    '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',
+  preparedTransactionHash: 'ksIGb7rHHuKuVP8RDe1f2NBTuUeeJTXfdYm1HonctHs=',
+  hashingSchemeVersion: 'HASHING_SCHEME_VERSION_V2',
+  hashingDetails: null,
+  costEstimation: {
+    estimationTimestamp: '2026-10-22T10:09:19.086839Z',
+    confirmationRequestTrafficCostEstimation: 3491,
+    confirmationResponseTrafficCostEstimation: 0,
+    totalTrafficCostEstimation: 3491,
+  },
+};

modules/sdk-coin-canton/test/unit/builder/settlementAuthorization/settlementAuthorizationBuilder.ts

@@ -39,6 +39,8 @@ describe('Broadridge Settlement Authorization Builder', function () {
     });
     assert.equal(request.broadridge?.standard, 'CIP-56');
     assert.equal(request.broadridge?.role, 'client');
+    assert.equal(request.broadridge?.client, client);
+    assert.equal(request.broadridge?.executor, executor);
     assert.equal(request.broadridge?.entityName, 'StandingDelegationImpl_v1');
   });
 

modules/sdk-coin-canton/test/unit/utils.ts

@@ -9,6 +9,7 @@ import {
   CANTON_ADDRESSES,
   CANTON_BLOCK_HEIGHT,
   CantonAllocationAllocatePrepareResponse,
+  CantonStandingDelegationPrepareResponse,
   CantonAllocationAllocateNativePrepareResponse,
   CantonAllocationAllocateNativeV2ReceiveOnlyPreparedResponse,
   CantonAllocationAllocateTokenV2ReceiveOnlyPreparedResponse,
@@ -236,6 +237,32 @@ describe('Canton Util', function () {
       assert.equal(parsedData.amount, '5000000000');
       assert.equal(parsedData.token, 'tcanton:tt');
     });
+
+    it('should parse the Broadridge standing delegation prepared transaction', () => {
+      const parsedData = utils.parseRawCantonTransactionData(
+        CantonStandingDelegationPrepareResponse.preparedTransaction,
+        TransactionType.CantonCommand
+      );
+      should.exist(parsedData.broadridgeSettlementAuthorizationData);
+      assert.equal(parsedData.sender, '');
+      assert.equal(parsedData.receiver, '');
+      assert.equal(parsedData.amount, '0');
+      assert.equal(
+        parsedData.broadridgeSettlementAuthorizationData?.descriptor.entityName,
+        'StandingDelegationImpl_v1'
+      );
+      assert.equal(
+        parsedData.broadridgeSettlementAuthorizationData?.client,
+        'test-delegation::122092e7d33ac10c0f3d55976342f37555df05da5b742956d56a62ae2367769079d2'
+      );
+      assert.equal(
+        parsedData.broadridgeSettlementAuthorizationData?.executor,
+        'btgo-operator::1220eb693ade486ff8a112f999e6392fc0427bc14da42ee20e51998575a53efef0cd'
+      );
+      assert.deepStrictEqual(parsedData.broadridgeSettlementAuthorizationData?.descriptor.actors, [
+        'test-delegation::122092e7d33ac10c0f3d55976342f37555df05da5b742956d56a62ae2367769079d2',
+      ]);
+    });
   });
 
   describe('Wallet init transaction', function () {