create mock transaction sender

packages/data-layer/src/allo/transaction-sender.ts

@@ -58,6 +58,44 @@ export function createViemTransactionSender(
   };
 }
 
+/**
+ *  @dev This is a mock transaction sender that does not actually send transactions. It is useful for testing.
+ *
+ *  @example
+ *  const sender = createInMemoryTransactionSender();
+ *  const txHash = await sender.send({
+ *  to: "0x1234",
+ *  data: "0x1234",
+ *  value: 0n,
+ *  });
+ *  const receipt = await sender.wait(txHash);
+ *  console.log(receipt);
+ *  // { transactionHash: '0x...', blockHash: '0x...', blockNumber: 1n }
+ */
+export function createMockTransactionSender(): TransactionSender & {
+  transactions: Record<Hex, TransactionReceipt>;
+} {
+  const transactions: Record<Hex, TransactionReceipt> = {};
+
+  return {
+    transactions,
+
+    async send(_tx: TransactionData): Promise<Hex> {
+      const txHash = `0x${Math.random().toString(16).slice(2)}` as Hex;
+      transactions[txHash] = {
+        transactionHash: txHash,
+        blockHash: `0x${Math.random().toString(16).slice(2)}` as Hex,
+        blockNumber: 1n,
+      };
+      return txHash;
+    },
+
+    async wait(txHash: Hex): Promise<TransactionReceipt> {
+      return transactions[txHash];
+    },
+  };
+}
+
 export async function sendTransaction(
   sender: TransactionSender,
   args: Parameters<typeof encodeFunctionData>[0] & { address: Address },