Get missing fields in transaction data for subgraph event handlers (#102)

* Get missing fields in event transaction

* Cache transaction data for event handlers in subgraph

packages/util/src/eth.ts

@@ -55,3 +55,19 @@ export function decodeHeader (rlp : Uint8Array): any {
 export function decodeData (hexLiteral: string): Uint8Array {
   return Uint8Array.from(Buffer.from(hexLiteral.slice(2), 'hex'));
 }
+
+export function decodeTransaction (rlp : Uint8Array): any {
+  try {
+    const data = utils.RLP.decode(rlp);
+
+    return {
+      GasPrice: decodeInteger(data[1], BigInt(0)),
+      GasLimit: decodeInteger(data[2], BigInt(0)),
+      Amount: decodeInteger(data[4], BigInt(0)),
+      Data: data[5]
+    };
+  } catch (error: any) {
+    log(error);
+    return undefined;
+  }
+}

packages/util/src/job-runner.ts

@@ -225,15 +225,15 @@ export class JobRunner {
       blockProgress = await this._indexer.fetchBlockEvents({ cid, blockHash, blockNumber, parentHash, blockTimestamp: timestamp });
     }
 
+    if (this._indexer.processBlock) {
+      await this._indexer.processBlock(blockHash, blockNumber);
+    }
+
     // Check if block has unprocessed events.
     if (blockProgress.numProcessedEvents < blockProgress.numEvents) {
       await this._jobQueue.pushJob(QUEUE_EVENT_PROCESSING, { kind: JOB_KIND_EVENTS, blockHash: blockProgress.blockHash, publish: true });
     }
 
-    if (this._indexer.processBlock) {
-      await this._indexer.processBlock(blockHash, blockNumber);
-    }
-
     const indexBlockDuration = new Date().getTime() - indexBlockStartTime.getTime();
     log(`time:job-runner#_indexBlock: ${indexBlockDuration}ms`);
   }

packages/util/src/misc.ts

@@ -194,6 +194,7 @@ export const getFullBlock = async (ethClient: EthClient, ethProvider: providers.
   const { size } = await provider.send('eth_getBlockByHash', [blockHash, false]);
 
   return {
+    headerId: fullBlock.id,
     cid: fullBlock.cid,
     blockNumber: fullBlock.blockNumber,
     blockHash: fullBlock.blockHash,
@@ -211,3 +212,26 @@ export const getFullBlock = async (ethClient: EthClient, ethProvider: providers.
     size: BigInt(size).toString()
   };
 };
+
+export const getFullTransaction = async (ethClient: EthClient, headerId: number, txHash: string): Promise<any> => {
+  const {
+    ethTransactionCidByHeaderIdAndTxHash: fullTx
+  } = await ethClient.getFullTransaction({ headerId, txHash });
+
+  assert(fullTx.blockByMhKey);
+
+  // Decode the transaction data.
+  const extraData = EthDecoder.decodeTransaction(EthDecoder.decodeData(fullTx.blockByMhKey.data));
+  assert(extraData);
+
+  return {
+    hash: txHash,
+    from: fullTx.src,
+    to: fullTx.dst,
+    index: fullTx.index,
+    value: extraData.Amount.toString(),
+    gasLimit: extraData.GasLimit.toString(),
+    gasPrice: extraData.GasPrice.toString(),
+    input: extraData.Data
+  };
+};