feat: expose transaction data from AztecRPC (#2469)

This PR relates to #1501 and makes transaction information available to
consumers of `AztecRPC`.

Fix #1501 

# Checklist:
Remove the checklist to signal you've completed it. Enable auto-merge if
the PR is ready to merge.
- [ ] If the pull request requires a cryptography review (e.g.
cryptographic algorithm implementations) I have added the 'crypto' tag.
- [ ] I have reviewed my diff in github, line by line and removed
unexpected formatting changes, testing logs, or commented-out code.
- [ ] Every change is related to the PR description.
- [ ] I have
[linked](https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue)
this pull request to relevant issues (if any exist).

yarn-project/aztec-rpc/src/aztec_rpc_http/aztec_rpc_http_server.ts

@@ -9,6 +9,7 @@ import {
   ExtendedContractData,
   L2Block,
   L2BlockL2Logs,
+  L2Tx,
   NotePreimage,
   Tx,
   TxExecutionRequest,
@@ -43,6 +44,7 @@ export function getHttpRpcServer(aztecRpcServer: AztecRPC): JsonRpcServer {
       NotePreimage,
       AuthWitness,
       L2Block,
+      L2Tx,
     },
     { Tx, TxReceipt, L2BlockL2Logs },
     false,

yarn-project/aztec-rpc/src/aztec_rpc_server/aztec_rpc_server.ts

@@ -37,6 +37,7 @@ import {
   KeyStore,
   L2Block,
   L2BlockL2Logs,
+  L2Tx,
   LogType,
   NodeInfo,
   NotePreimage,
@@ -302,6 +303,10 @@ export class AztecRPCServer implements AztecRPC {
     return new TxReceipt(txHash, TxStatus.DROPPED, 'Tx dropped by P2P node.');
   }
 
+  public async getTx(txHash: TxHash): Promise<L2Tx | undefined> {
+    return await this.node.getTx(txHash);
+  }
+
   async getBlockNumber(): Promise<number> {
     return await this.node.getBlockNumber();
   }

yarn-project/aztec.js/src/aztec_rpc_client.ts

@@ -6,6 +6,7 @@ import {
   ContractData,
   ExtendedContractData,
   L2BlockL2Logs,
+  L2Tx,
   NotePreimage,
   Tx,
   TxExecutionRequest,
@@ -31,6 +32,7 @@ export const createAztecRpcClient = (url: string, fetch = makeFetch([1, 2, 3], t
       GrumpkinScalar,
       NotePreimage,
       AuthWitness,
+      L2Tx,
     },
     { Tx, TxReceipt, L2BlockL2Logs },
     false,

yarn-project/aztec.js/src/wallet/base_wallet.ts

@@ -7,6 +7,7 @@ import {
   ExtendedContractData,
   FunctionCall,
   L2BlockL2Logs,
+  L2Tx,
   NodeInfo,
   NotePreimage,
   SyncStatus,
@@ -61,6 +62,9 @@ export abstract class BaseWallet implements Wallet {
   sendTx(tx: Tx): Promise<TxHash> {
     return this.rpc.sendTx(tx);
   }
+  getTx(txHash: TxHash): Promise<L2Tx | undefined> {
+    return this.rpc.getTx(txHash);
+  }
   getTxReceipt(txHash: TxHash): Promise<TxReceipt> {
     return this.rpc.getTxReceipt(txHash);
   }

yarn-project/types/src/interfaces/aztec_rpc.ts

@@ -5,6 +5,7 @@ import {
   ContractData,
   ExtendedContractData,
   L2BlockL2Logs,
+  L2Tx,
   NotePreimage,
   Tx,
   TxExecutionRequest,
@@ -138,6 +139,13 @@ export interface AztecRPC {
    */
   getTxReceipt(txHash: TxHash): Promise<TxReceipt>;
 
+  /**
+   * Fetches a transaction by its hash.
+   * @param txHash - The transaction hash
+   * @returns A transaction object or undefined if the transaction hasn't been mined yet
+   */
+  getTx(txHash: TxHash): Promise<L2Tx | undefined>;
+
   /**
    * Retrieves the private storage data at a specified contract address and storage slot. Returns only data
    * encrypted for the specified owner that has been already decrypted by the RPC server. Note that there