wallet_prepareCalls | Alchemy Docs

1 import requests 2 3 url = "https://api.g.alchemy.com/v2/:apiKey" 4 5 payload = { "0": [ 6 { 7 "calls": [ 8 { 9 "to": "0x1234567890123456789012345678901234567890", 10 "data": "0x" 11 } 12 ], 13 "from": "0xa363219d7C0b8673df17529D469Db9eFF0f35D2A", 14 "chainId": "0x01", 15 "capabilities": { "paymasterService": { "policyId": "11111111-2222-3333-4444-555555555555" } } 16 } 17 ] } 18 headers = {"Content-Type": "application/json"} 19 20 response = requests.post(url, json=payload, headers=headers) 21 22 print(response.json())

1 { 2 "jsonrpc": "2.0", 3 "id": "1", 4 "result": { 5 "type": "user-operation-v070", 6 "data": { 7 "sender": "0xa363219d7C0b8673df17529D469Db9eFF0f35D2A", 8 "nonce": "0x10000000000000000", 9 "callData": "0x34fcd5be0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000600000000000000000000000000000000000000000000000000000000000000000", 10 "paymaster": "0x3f222Df6aB18C1E10d0Ec136503c3B0dfd929048", 11 "paymasterData": "0x0000000000000000682d7e7c9fa6f71c28c31141a11ac9eb2bdbe898ddbd42a4f7085f8bb3380ba75dd9231a386e24fe5a84777217c907391e983b5b0f78a4a9d0fd1c8631dd22c10e106b461c", 12 "paymasterPostOpGasLimit": "0x0", 13 "paymasterVerificationGasLimit": "0x74d3", 14 "maxPriorityFeePerGas": "0x60e4b0", 15 "maxFeePerGas": "0x1bf52290", 16 "callGasLimit": "0x2bb8", 17 "verificationGasLimit": "0xc845", 18 "preVerificationGas": "0x14b74" 19 }, 20 "chainId": "0x66eee", 21 "signatureRequest": { 22 "type": "personal_sign", 23 "data": { 24 "raw": "0xc69e468aa6fafb5c7298c02841e76f976b433018266af39a5807bc29ea9ad392" 25 }, 26 "rawPayload": "0x2a8073568c8fad3edf15f70c3471a7fff18e1d57c650a501ab47f57a5c1f0e39" 27 } 28 } 29 }

This method is used to prepare a user operation for submission. It will return a built user operation and a signature request which needs to be signed by the user before submitting to wallet_sendPreparedCalls

Path parameters

apiKeystringRequired

Request

This endpoint expects an object.

prepareCallsRequestobjectRequired

Response

This endpoint returns an object.

object

Array of prepared calls

object

Prepared User Operation (Entrypoint v0.6.0)

object

Prepared User Operation (Entrypoint v0.7.0)