alchemy_simulateExecution

POST

/{apiKey}

Simulates a single transaction's execution and returns decoded traces/logs.

Path Parameters

stringrequireddefaults to docs-demo

For higher throughput, create your own API key

Request

enumrequired

Specifies whether to return a 'NESTED' or 'FLAT' call structure.

Allowed values:

objectrequired

Transaction object to simulate.

enumrequired

The block context to use: 'latest', 'safe', 'finalized', or 'earliest'.

Allowed values:

Responses

200

The decoded execution traces and logs produced by simulating the transaction.

POST/v2/{apiKey}

curl --request POST \  --url https://eth-mainnet.g.alchemy.com/v2/docs-demo \  --header 'Content-Type: application/json' \  --data '{  "jsonrpc": "2.0",  "id": 1,  "method": "alchemy_simulateExecution",  "params": [    "FLAT",    {      "from": "0x0dd7eef07982749410eceaa721cdc8ff3167fc9b",      "to": "0x68b3465833fb72a70ecdf485e0e4c7bd8665fc45",      "data": "0x5ae401dc00000000000000000000000000000000000000000000000000000000634ef02f0000000000000000000000000000000000000000000000000000000000000000",      "gas": "0x22710",      "gasPrice": "0x3b9aca00"    },    "latest"  ]}'

200Success

{  "jsonrpc": "2.0",  "id": 1,  "result": {    "calls": [      {        "type": "CALL",        "from": "0x0dd7eef07982749410eceaa721cdc8ff3167fc9b",        "to": "0x68b3465833fb72a70ecdf485e0e4c7bd8665fc45",        "value": "0x0",        "gas": "0x22710",        "gasUsed": "0x1ab62",        "input": "0x5ae401dc00000000000000000000000000000000000000000000000000000000634ef02f0000000000000000000000000000000000000000000000000000000000000000",        "output": "0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",        "decoded": {          "authority": "ETHERSCAN",          "methodName": "multicall",          "inputs": [            {              "name": "deadline",              "type": "uint256",              "value": "1666117679"            },            {              "name": "data",              "type": "bytes[]",              "value": "0x04e45aaf000000000000000000000000..."            }          ],          "outputs": [            {              "name": "",              "type": "bytes[]",              "value": "0x000000000000000000000000000000000000000000..."            }          ]        }      }    ],    "logs": [      {        "address": "0x6b175474e89094c44da98b954eedeac495271d0f",        "data": "0x0000000000000000000000000000000000000000000000001bc097e5badd8f46",        "topics": [          "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",          "0x48da0965ab2d2cbf1c17c09cfb5cbe67ad5b1406",          "0xdd7eef07982749410eceaa721cdc8ff3167fc9b"        ],        "decoded": {          "authority": "ETHERSCAN",          "eventName": "Transfer",          "inputs": [            {              "name": "src",              "type": "address",              "value": "0x48da0965ab2d2cbf1c17c09cfb5cbe67ad5b1406",              "indexed": true            },            {              "name": "dst",              "type": "address",              "value": "0x0dd7eef07982749410eceaa721cdc8ff3167fc9b",              "indexed": true            },            {              "name": "wad",              "type": "uint256",              "value": "1999765247490887494",              "indexed": false            }          ]        }      }    ],    "error": "",    "revertReason": null  }}

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alchemy_simulateExecution

Path Parameters

apiKey

Request

format

transaction

blockTag

Responses

200