fix(abstract-eth): fix flush v4 tx building from hex

TICKET: WP-1652

Author: sreerajs

modules/abstract-eth/src/lib/iface.ts

@@ -136,6 +136,7 @@ export interface ERC1155TransferData extends TokenTransferData {
 export interface FlushTokensData {
   forwarderAddress: string;
   tokenAddress: string;
+  forwarderVersion?: number;
 }
 
 export interface NativeTransferData extends TransferData {

modules/abstract-eth/src/lib/transactionBuilder.ts

@@ -216,7 +216,13 @@ export abstract class TransactionBuilder extends BaseTransactionBuilder {
         break;
       case TransactionType.FlushTokens:
         this.setContract(transactionJson.to);
-        const { forwarderAddress, tokenAddress } = decodeFlushTokensData(transactionJson.data, transactionJson.to);
+        const { forwarderAddress, tokenAddress, forwarderVersion } = decodeFlushTokensData(
+          transactionJson.data,
+          transactionJson.to
+        );
+        if (forwarderVersion === 4) {
+          this.forwarderVersion(4);
+        }
         this.forwarderAddress(forwarderAddress);
         this.tokenAddress(tokenAddress);
         break;

modules/abstract-eth/src/lib/utils.ts

@@ -464,6 +464,7 @@ export function decodeFlushTokensData(data: string, to?: string): FlushTokensDat
     return {
       forwarderAddress: to,
       tokenAddress: addHexPrefix(tokenAddress as string),
+      forwarderVersion: 4,
     };
   } else {
     throw new BuildTransactionError(`Invalid transfer bytecode: ${data}`);

modules/sdk-coin-eth/test/unit/transactionBuilder/flushTokens.ts

@@ -163,10 +163,11 @@ describe('Eth Transaction builder flush tokens', function () {
         forwarderVersion: 4,
       });
       const txBuiderFromRaw: any = getBuilder('teth');
-      txBuiderFromRaw.fromImplementation(tx.toBroadcastFormat());
-      // txBuiderFromRaw.type.should.equal(TransactionType.FlushTokens);
-      txBuiderFromRaw._forwarderAddress.should.equal('0x53b8e91bb3b8f618b5f01004ef108f134f219573');
-      txBuiderFromRaw._tokenAddress.should.equal('0xbcf935d206ca32929e1b887a07ed240f0d8ccd22');
+      txBuiderFromRaw.from(tx.toBroadcastFormat());
+      const result = await txBuiderFromRaw.build();
+      const txJson = result.toJson();
+      txJson.to.should.equal('0x53b8e91bb3b8f618b5f01004ef108f134f219573');
+      txJson.data.should.containEql('bcf935d206ca32929e1b887a07ed240f0d8ccd22');
     });
 
     it('decode wallet flush forwarder transaction with forwarder Version < 4', async () => {
@@ -182,10 +183,12 @@ describe('Eth Transaction builder flush tokens', function () {
         forwarderVersion: 2,
       });
       const txBuiderFromRaw: any = getBuilder('teth');
-      txBuiderFromRaw.fromImplementation(tx.toBroadcastFormat());
-      // txBuiderFromRaw.type.should.equal(TransactionType.FlushTokens);
-      txBuiderFromRaw._forwarderAddress.should.equal('0x53b8e91bb3b8f618b5f01004ef108f134f219573');
-      txBuiderFromRaw._tokenAddress.should.equal('0xbcf935d206ca32929e1b887a07ed240f0d8ccd22');
+      txBuiderFromRaw.from(tx.toBroadcastFormat());
+      const result = await txBuiderFromRaw.build();
+      const txJson = result.toJson();
+      txJson.to.should.equal('0x8f977e912ef500548a0c3be6ddde9899f1199b81');
+      txJson.data.should.containEql('bcf935d206ca32929e1b887a07ed240f0d8ccd22');
+      txJson.data.should.containEql('53b8e91bb3b8f618b5f01004ef108f134f219573');
     });
 
     it('an unsigned flush transaction from serialized', async () => {