[Transaction] eth_call

Executes a new message call immediately, without creating a transaction on the block chain. The eth_call method can be used to query internal contract state, to execute validations coded into a contract or even to test what the effect of a transaction would be without running it live.

JSONRPC: eth_call

Request

application/json

Body

method stringrequired

Default value: eth_call

Method name

id int64required

Default value: 1

Request ID, Random or Auto incrementation

jsonrpc stringrequired

Default value: 2.0

JSON-RPC Version (2.0)

params

undefined[]

Array [

EthCallObject

object

The transaction call object. See the next table for the object's properties.

from 20-byte DATA

(optional) Address the transaction is simulated to have been sent from. The 0x00..0 address is used if no address is specified.

to 20-byte DATA

(optional) Address the transaction is sent to.

gas hex

(optional) Maximum gas allowance for the code execution to avoid infinite loops. Defaults to 2^63 or whatever value the node operator specified via --rpc.gascap.

gasPrice hex

(optional) Number of peb to simulate paying for each unit of gas during execution. Defaults to 0 peb.

value hex

(optional) Amount of peb to simulate sending along with the transaction. Defaults to 0.

input DATA

(optional) Hash of the method signature and encoded parameter. It replaces data field, but 'data` field is still supported for backward compatibility.

BlockNumberOrTag

object

oneOf

IntegerBlockNumber

number

HexadecimalBlockNumber

string

BlockTag

string

StateOverrideSet

object

The state override set is an optional address-to-state mapping, where each entry specifies some state to be ephemerally overridden prior to executing the call.

balance int64

(optional) Fake balance to set for the account before executing the call.

nonce int64

(optional) Fake nonce to set for the account before executing the call.

code DATA

(optional) Fake EVM bytecode to inject into the account before executing the call.

state object

(optional) Fake key-value mapping to override all slots in the account storage before executing the call.

stateDiff object

(optional) Fake key-value mapping to override individual slots in the account storage before executing the call.

]

Responses

200

The returned data of the call

application/json

Schema

Schema

jsonrpc stringrequired

Default value: 2.0

id int64required

error

object

code int64required

A Number that indicates the error type that occurred. This MUST be an integer.

| code | message | description | |-----|-----|-------| | -32700 | Parse error | invalid JSON was received by the server. An error occurred on the server while parsing the JSON text. | |-32602 | Invalid params | Invalid method parameter(s). |

message string

A String providing a short description of the error. The message SHOULD be limited to a concise single sentence.

data string

A Primitive or Structured value that contains additional information about the error. This may be omitted. The value of this member is defined by the Server (e.g. detailed error information, nested errors etc.).

result string

Example (from schema)

{
  "jsonrpc": "2.0",
  "id": 0,
  "error": {
    "code": -32700,
    "message": "Parse error",
    "data": "string"
  },
  "result": "0x0000000000000000000000000000000000000000000000000000000000000000"
}

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