alchemy_simulateExecutionBundle

1 import requests 2 3 url = "https://eth-mainnet.g.alchemy.com/v2/:apiKey" 4 5 payload = { "0": [ 6 { 7 "from": "0xd8da6bf26964af9d7eed9e03e53415d37aa96045", 8 "to": "0x68b3465833fb72a70ecdf485e0e4c7bd8665fc45", 9 "data": "0x5ae401dc00000000000000000000000000000000000000000000000000000000634ef02f..." 10 }, 11 { 12 "from": "0x48da0965ab2d2cbf1c17c09cfb5cbe67ad5b1406", 13 "to": "0x6b175474e89094c44da98b954eedeac495271d0f", 14 "data": "0xa9059cbb0000000000000000000000000dd7eef07982749410eceaa721cdc8ff3167fc9b..." 15 } 16 ] } 17 headers = {"Content-Type": "application/json"} 18 19 response = requests.post(url, json=payload, headers=headers) 20 21 print(response.json())

1 { 2 "jsonrpc": "2.0", 3 "id": "1", 4 "result": { 5 "calls": [ 6 { 7 "type": "CALL", 8 "from": "0xd8da6bf26964af9d7eed9e03e53415d37aa96045", 9 "to": "0x68b3465833fb72a70ecdf485e0e4c7bd8665fc45" 10 }, 11 { 12 "type": "CALL", 13 "from": "0x48da0965ab2d2cbf1c17c09cfb5cbe67ad5b1406", 14 "to": "0x6b175474e89094c44da98b954eedeac495271d0f" 15 } 16 ], 17 "logs": [ 18 { 19 "address": "0x6b175474e89094c44da98b954eedeac495271d0f" 20 } 21 ], 22 "error": null, 23 "revertReason": null 24 } 25 }

Simulates multiple transactions sequentially and returns decoded execution traces and logs.

Path parameters

apiKeystringRequired

Request

This endpoint expects an object.

transactionslist of objectsRequired

An array of 1–2 transaction objects to run in sequence.

Response

The decoded execution traces and logs from simulating multiple transactions in a bundle.

callslist of objects

logslist of objects

errorstring or null

If the transaction would revert, error explains the reason

revertReasonstring or null

The reason why a transaction would revert. Provides details about potential transaction failure before execution.