Call contract

import requests

url = "https://api.example.com/api/v1/wallets/{wallet_uuid}/contract-call"

payload = {
    "chain_id": "<string>",
    "contract_addr": "<string>",
    "value": "0",
    "calldata": "<string>",
    "instructions": [
        {
            "program_id": "<string>",
            "accounts": [
                {
                    "pubkey": "<string>",
                    "is_signer": True,
                    "is_writable": True
                }
            ],
            "data": "<string>"
        }
    ],
    "address_lookup_table_accounts": [
        {
            "alt_account_key": "<string>",
            "addresses": ["<string>"]
        }
    ],
    "request_id": "<string>",
    "fee": {
        "max_fee_per_gas": "<string>",
        "max_priority_fee_per_gas": "<string>",
        "token_id": "<string>",
        "fee_type": "EVM_EIP_1559",
        "gas_limit": "<string>"
    },
    "src_addr": "<string>",
    "sponsor": True,
    "gas_provider": "<string>",
    "description": "<string>"
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

curl --request POST \
  --url https://api.example.com/api/v1/wallets/{wallet_uuid}/contract-call \
  --header 'Content-Type: application/json' \
  --data '
{
  "chain_id": "<string>",
  "contract_addr": "<string>",
  "value": "0",
  "calldata": "<string>",
  "instructions": [
    {
      "program_id": "<string>",
      "accounts": [
        {
          "pubkey": "<string>",
          "is_signer": true,
          "is_writable": true
        }
      ],
      "data": "<string>"
    }
  ],
  "address_lookup_table_accounts": [
    {
      "alt_account_key": "<string>",
      "addresses": [
        "<string>"
      ]
    }
  ],
  "request_id": "<string>",
  "fee": {
    "max_fee_per_gas": "<string>",
    "max_priority_fee_per_gas": "<string>",
    "token_id": "<string>",
    "fee_type": "EVM_EIP_1559",
    "gas_limit": "<string>"
  },
  "src_addr": "<string>",
  "sponsor": true,
  "gas_provider": "<string>",
  "description": "<string>"
}
'

{
  "result": {
    "status": 123,
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "idempotent": false,
    "request_id": "<string>",
    "pending_operation_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "approval_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "transaction_hash": "<string>",
    "status_display": ""
  },
  "success": true,
  "suggestion": "",
  "message": "",
  "meta": {
    "total": 123,
    "offset": 123,
    "limit": 123,
    "has_more": true,
    "after": "<string>",
    "before": "<string>"
  }
}

{
  "result": {
    "status": 123,
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "idempotent": false,
    "request_id": "<string>",
    "pending_operation_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "approval_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "transaction_hash": "<string>",
    "status_display": ""
  },
  "success": true,
  "suggestion": "",
  "message": "",
  "meta": {
    "total": 123,
    "offset": 123,
    "limit": 123,
    "has_more": true,
    "after": "<string>",
    "before": "<string>"
  }
}

{
  "success": false,
  "error": {
    "detail": [
      {
        "loc": [
          "<string>"
        ],
        "msg": "<string>",
        "type": "<string>",
        "input": "<unknown>",
        "ctx": {}
      }
    ]
  }
}

Transactions

Call contract

This operation submits a smart contract call from the specified wallet.

For EVM chains, provide contract_addr, value, and calldata. For Solana, provide instructions and optionally address_lookup_table_accounts.

Supply request_id to enable idempotency. If a contract call with the same request_id already exists for the same principal, the existing record is returned with idempotent=true.

The operation returns status=200 (PENDING_APPROVAL) when an approval policy requires review. Use the pending_operation_id to track and resolve the approval.

Policy evaluation runs before submission. The operation returns an error if a policy denies the contract call.

POST

api

wallets

{wallet_uuid}

contract-call

Call contract

import requests

url = "https://api.example.com/api/v1/wallets/{wallet_uuid}/contract-call"

payload = {
    "chain_id": "<string>",
    "contract_addr": "<string>",
    "value": "0",
    "calldata": "<string>",
    "instructions": [
        {
            "program_id": "<string>",
            "accounts": [
                {
                    "pubkey": "<string>",
                    "is_signer": True,
                    "is_writable": True
                }
            ],
            "data": "<string>"
        }
    ],
    "address_lookup_table_accounts": [
        {
            "alt_account_key": "<string>",
            "addresses": ["<string>"]
        }
    ],
    "request_id": "<string>",
    "fee": {
        "max_fee_per_gas": "<string>",
        "max_priority_fee_per_gas": "<string>",
        "token_id": "<string>",
        "fee_type": "EVM_EIP_1559",
        "gas_limit": "<string>"
    },
    "src_addr": "<string>",
    "sponsor": True,
    "gas_provider": "<string>",
    "description": "<string>"
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

curl --request POST \
  --url https://api.example.com/api/v1/wallets/{wallet_uuid}/contract-call \
  --header 'Content-Type: application/json' \
  --data '
{
  "chain_id": "<string>",
  "contract_addr": "<string>",
  "value": "0",
  "calldata": "<string>",
  "instructions": [
    {
      "program_id": "<string>",
      "accounts": [
        {
          "pubkey": "<string>",
          "is_signer": true,
          "is_writable": true
        }
      ],
      "data": "<string>"
    }
  ],
  "address_lookup_table_accounts": [
    {
      "alt_account_key": "<string>",
      "addresses": [
        "<string>"
      ]
    }
  ],
  "request_id": "<string>",
  "fee": {
    "max_fee_per_gas": "<string>",
    "max_priority_fee_per_gas": "<string>",
    "token_id": "<string>",
    "fee_type": "EVM_EIP_1559",
    "gas_limit": "<string>"
  },
  "src_addr": "<string>",
  "sponsor": true,
  "gas_provider": "<string>",
  "description": "<string>"
}
'

{
  "result": {
    "status": 123,
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "idempotent": false,
    "request_id": "<string>",
    "pending_operation_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "approval_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "transaction_hash": "<string>",
    "status_display": ""
  },
  "success": true,
  "suggestion": "",
  "message": "",
  "meta": {
    "total": 123,
    "offset": 123,
    "limit": 123,
    "has_more": true,
    "after": "<string>",
    "before": "<string>"
  }
}

{
  "result": {
    "status": 123,
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "idempotent": false,
    "request_id": "<string>",
    "pending_operation_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "approval_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "transaction_hash": "<string>",
    "status_display": ""
  },
  "success": true,
  "suggestion": "",
  "message": "",
  "meta": {
    "total": 123,
    "offset": 123,
    "limit": 123,
    "has_more": true,
    "after": "<string>",
    "before": "<string>"
  }
}

{
  "success": false,
  "error": {
    "detail": [
      {
        "loc": [
          "<string>"
        ],
        "msg": "<string>",
        "type": "<string>",
        "input": "<unknown>",
        "ctx": {}
      }
    ]
  }
}

Headers

X-API-Key

string | null

Path Parameters

wallet_uuid

string<uuid>

required

The UUID of the wallet from which to execute the contract call. Retrieve this value from the id field returned when the wallet was created.

Body

application/json

Request payload for contract call (EVM or Solana).

chain_id

string

required

The Cobo chain ID for this contract call (for example, SETH, BASE_ETH, SOL). Use the List supported chains operation to retrieve all supported chain IDs.

Required string length: 1 - 100

contract_addr

string | null

The EVM contract address to call. Required for EVM chains.

Maximum string length: 255

value

string

default:0

The ETH value to send with the call, in whole token units (not wei), as a decimal string. Defaults to 0.

Required string length: 1 - 100

calldata

string | null

The ABI-encoded calldata for the EVM function call, as a hex string.

Maximum string length: 8192

instructions

SolInstruction · object[] | null

The Solana instructions for this call. Required for Solana chains.

Show child attributes

address_lookup_table_accounts

SolAddressLookupTableAccount · object[] | null

Optional Solana address lookup table accounts for this call.

Show child attributes

request_id

string | null

A client-supplied identifier for idempotency. If a contract call with the same request_id already exists for the same principal, the existing record is returned.

Maximum string length: 255

fee

EIP1559FeeRequest · object

Optional custom fee parameters. If omitted, the network default is used.

EIP1559FeeRequest
EVMLegacyFeeRequest
SOLFeeRequest

Show child attributes

src_addr

string | null

The source address to call from. If omitted, the server auto-selects the wallet address on this chain with the highest available native token balance for this chain (explicit src_addr always takes precedence).

Maximum string length: 255

Whether to use Cobo Gasless (Fee Station) to cover gas fees. true: gas fees are sponsored. false: gas fees are paid from the wallet. Defaults to true for human-owned wallets.

gas_provider

string | null

The gas provider to use for sponsored transactions. If omitted, the server default is used.

Maximum string length: 50

description

string | null

Optional note stored locally and sent to WaaS as the transaction description (contract call).

Maximum string length: 512

Response

Successful Response

result

ContractCallSubmitResult · object

required

Contract call submission response payload.

Show child attributes

success

boolean

default:true

suggestion

string

default:""

message

string

default:""

General

CLI

API reference

Call contract

Headers

Path Parameters

Body

Response