Parameters

Object - The transaction call object
- from: DATA, 20 Bytes - (optional) The address the transaction is sent from.
- to: DATA, 20 Bytes - The address the transaction is directed to.
- gas: QUANTITY - (optional) Integer of the gas provided for the transaction execution. eth_call consumes zero gas, but this parameter may be needed by some executions.
  
  NOTE: this parameter has a cap of 550 Million Gwei per request. Reach out to us at support@unifra.io if you want to increase this limit.
- gasPrice: QUANTITY - (optional) Integer of the gasPrice used for each paid gas.
  
  Note: most of our users (95%+) never set the gasPrice on eth_call.
- value: QUANTITY - (optional) Integer of the value sent with this transaction
- data: DATA - (optional) Hash of the method signature and encoded parameters. For details see Ethereum Contract ABI
QUANTITY|TAG - Integer block number, or the string "latest", "earliest" or "pending" (see the default block parameter), OR the blockHash (in accordance with EIP-1898)

Note: the parameter is an object instead of a string and should be specified as: {"blockHash": "0x``<some-hash>``"}. Learn more here.

Note: eth_call has a timeout restriction at the node level. Batching multiple eth_call together on-chain using pre-deployed smart contracts might result in unexpected timeouts that cause none of your calls to complete. Instead, consider serializing these calls, or using smaller batches if they fail with a node error code.

params: [
  {
    "to": "0x5A77f1443D16ee5761d310e38b62f77f726bC71c",
    "data": "0x06fdde03"
  },
  "latest"
]

Example: Reading ERC20 Token Name

to: WETH contract address on XLayer
data: 0x06fdde03 (function selector for name())
Block: "latest" (current state)

Returns

DATA - The return value of executed contract.

Example

Request

curl https://xlayer-mainnet.unifra.io/v1/your-api-key \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_call","params":[{"to":"0x5A77f1443D16ee5761d310e38b62f77f726bC71c","data":"0x06fdde03"},"latest"],"id":1}'

URL: https://xlayer-mainnet.unifra.io/v1/your-api-key
RequestType: POST
Body:
{
  "jsonrpc":"2.0",
  "method":"eth_call",
  "params":[
    {
      "to": "0x5A77f1443D16ee5761d310e38b62f77f726bC71c",
      "data": "0x06fdde03"
    },
    "latest"
  ],
  "id":1
}

Result

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000d5772617070656420457468657200000000000000000000000000000000000000"
}

Result Explanation:

The result is a hex-encoded string representing the token name
Decoding the hex: "Wrapped Ether" (WETH token name)
The first 32 bytes (0x0000...0020) indicate the string starts at offset 32 bytes
The second 32 bytes (0x0000...000d) indicate the string length is 13 characters
The third part contains the actual UTF-8 encoded string "Wrapped Ether"
This is a read-only call that returns meaningful, repeatable data

200OK