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POST
/
wallets
/
{walletId}
/
addresses
/
{addressId}
/
contracts
/
network-fee
Child Address Network Fee
curl --request POST \
  --url https://api.blockradar.co/wallets/{walletId}/addresses/{addressId}/contracts/network-fee \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "calls": [
    {
      "abi": [
        {
          "constant": false,
          "inputs": [
            {
              "name": "_to",
              "type": "address"
            },
            {
              "name": "_value",
              "type": "uint256"
            }
          ],
          "name": "transfer",
          "outputs": [],
          "payable": false,
          "stateMutability": "nonpayable",
          "type": "function"
        }
      ],
      "address": "0x337610d27c682E347C9cD60BD4b3b107C9d34dDd",
      "method": "transfer",
      "parameters": [
        "0x2455eC6700092991Ce0782365A89d5Cd89c8Fa22",
        "10000"
      ]
    },
    {
      "abi": [
        {
          "constant": false,
          "inputs": [
            {
              "name": "_to",
              "type": "address"
            },
            {
              "name": "_value",
              "type": "uint256"
            }
          ],
          "name": "transfer",
          "outputs": [],
          "payable": false,
          "stateMutability": "nonpayable",
          "type": "function"
        }
      ],
      "address": "0x337610d27c682E347C9cD60BD4b3b107C9d34dDd",
      "method": "transfer",
      "parameters": [
        "0x2455eC6700092991Ce0782365A89d5Cd89c8Fa22",
        "10000"
      ]
    }
  ]
}
'
{
  "data": {
    "balance": "1.012299726305777896",
    "fee": "0.00422709309982132"
  },
  "message": "Network fee retrieved successfully",
  "statusCode": 200
}

​
Batch Operations

This endpoint supports batch operations, allowing you to estimate network fees for multiple contract operations from a specific child address in a single API call.

​
Batch Request Format

To estimate fees for multiple operations, use the calls array: 
{
  "calls": [
    {
      "address": "0xTokenContract...",
      "method": "approve",
      "parameters": ["0xSpender...", "1000000000000000000"],
      "abi": [...]
    },
    {
      "address": "0xProtocolContract...",
      "method": "deposit",
      "parameters": ["1000000000000000000"],
      "abi": [...]
    }
  ]
}

​
Batch Response Format

Returns individual fees plus totals: 
{
  "message": "Batch network fee retrieved (2/2 successful)",
  "statusCode": 200,
  "data": {
    "fees": [
      {
        "index": 0,
        "method": "approve",
        "fee": "0.00001247904",
        "networkFee": "0.00001247904",
        "networkFeeInUSD": "0.01",
        "nativeBalance": "0.5",
        "nativeBalanceInUSD": "450.00",
        "estimatedArrivalTime": 30,
        "transactionFee": "0"
      },
      {
        "index": 1,
        "method": "deposit",
        "fee": "0.00000504",
        "networkFee": "0.00000504",
        "networkFeeInUSD": "0.005",
        "nativeBalance": "0.5",
        "nativeBalanceInUSD": "450.00",
        "estimatedArrivalTime": 30,
        "transactionFee": "0"
      }
    ],
    "totalFee": "0.00001751904",
    "estimatedArrivalTime": 60,
    "errors": []
  }
}

​
Response Fields

FieldDescription
feesArray of individual fee estimates
totalFeeSum of all network fees
estimatedArrivalTimeTotal time (sum of individual times, 30s each)
errorsArray of any failed estimations

​
Validation Rules

RuleValue
Max batch size20 operations
Min batch size1 operation

​
Use Cases

  • Fee estimation: Calculate total cost before executing batch operations
  • Gas optimization: Compare fees across different operation orderings
  • Budget planning: Estimate costs for multi-step DeFi transactions

Autorizaciones

​
x-api-key
string
header
requerido

Parámetros de ruta

​
walletId
string
requerido
Ejemplo:

"YOUR_WALLET_ID"

​
addressId
string
requerido
Ejemplo:

"ADDRESS_ID"

Cuerpo

application/json
​
calls
object[]
Ejemplo:
[
  {
    "abi": [
      {
        "constant": false,
        "inputs": [
          { "name": "_to", "type": "address" },
          { "name": "_value", "type": "uint256" }
        ],
        "name": "transfer",
        "outputs": [],
        "payable": false,
        "stateMutability": "nonpayable",
        "type": "function"
      }
    ],
    "address": "0x337610d27c682E347C9cD60BD4b3b107C9d34dDd",
    "method": "transfer",
    "parameters": [
      "0x2455eC6700092991Ce0782365A89d5Cd89c8Fa22",
      "10000"
    ]
  },
  {
    "abi": [
      {
        "constant": false,
        "inputs": [
          { "name": "_to", "type": "address" },
          { "name": "_value", "type": "uint256" }
        ],
        "name": "transfer",
        "outputs": [],
        "payable": false,
        "stateMutability": "nonpayable",
        "type": "function"
      }
    ],
    "address": "0x337610d27c682E347C9cD60BD4b3b107C9d34dDd",
    "method": "transfer",
    "parameters": [
      "0x2455eC6700092991Ce0782365A89d5Cd89c8Fa22",
      "10000"
    ]
  }
]

Respuesta

200 - application/json

Ethereum / Tron / Ethereum (Batch) / Tron (Batch)

​
data
object
​
message
string
Ejemplo:

"Network fee retrieved successfully"

​
statusCode
number
Ejemplo:

200