alchemy_simulateAssetChanges

1 import requests 2 3 url = "https://eth-mainnet.g.alchemy.com/v2/:apiKey" 4 5 payload = { "0": { 6 "from": "0xd8da6bf26964af9d7eed9e03e53415d37aa96045", 7 "to": "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48", 8 "data": "0xa9059cbb000000000000000000000000fc43f5f9dd45258b3aff31bdbe6561d97e8b71de00000000000000000000000000000000000000000000000000000000000f4240", 9 "gas": "0x5208", 10 "gasPrice": "0x3b9aca00" 11 } } 12 headers = {"Content-Type": "application/json"} 13 14 response = requests.post(url, json=payload, headers=headers) 15 16 print(response.json())

1 { 2 "jsonrpc": "2.0", 3 "id": "1", 4 "result": { 5 "changes": [ 6 { 7 "assetType": "ERC20", 8 "changeType": "TRANSFER", 9 "from": "0xd8da6bf26964af9d7eed9e03e53415d37aa96045", 10 "to": "0xfc43f5f9dd45258b3aff31bdbe6561d97e8b71de", 11 "rawAmount": "1000000", 12 "contractAddress": "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48", 13 "decimals": 6, 14 "symbol": "USDC", 15 "name": "USD Coin", 16 "logo": "https://static.alchemyapi.io/images/assets/3408.png", 17 "amount": "1", 18 "tokenId": null 19 } 20 ], 21 "gasUsed": "0x5208", 22 "error": null 23 } 24 }

Simulates a transaction and returns a list of asset changes.

Path parameters

apiKeystringRequired

Request

This endpoint expects an object.

transactionobjectRequired

Object describing the transaction to simulate.

Response

The asset changes resulting from the transaction simulation.

changeslist of objects

gasUsedstring or null

The amount of gas used for the simulation

errorstring or null

Error message if the transaction would revert, null otherwise