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eth_estimateGas RPC Method

Returns an estimation of gas for a given transaction.

Updated on
Feb 11, 2026

Parameters

transaction
object

The transaction call object. If no field is provided, the latest block is used by default

from
string

The address from which the transaction is sent

to
string

The address to which the transaction is addressed

gas
integer

The integer of gas provided for the transaction execution

gasPrice
integer

The integer of gasPrice used for each paid gas encoded as hexadecimal

value
integer

The integer of value sent with this transaction encoded as hexadecimal

data
string

The hash of the method signature and encoded parameters. For more information, see the Contract ABI description in the Solidity documentation.

blockNumber
string
REQUIRED

The block number in hexadecimal format or the string latest, earliest, pending, safe or finalized

Object
object

The State Override Set option allows you to change the state of a contract before executing the call, which means you can modify the values of variables stored in the contract, such as balances and approvals for that call without actually modifying the contract. Each address maps to an object containing:

balance
string

The fake balance to set for the account before executing the call

nonce
string

The fake nonce to set for the account before executing the call

code
string

The fake EVM bytecode to inject into the account before executing the call

state
object

The fake key-value mapping to override all slots in the account storage before executing the call

stateDiff
integer

The fake key-value mapping to override individual slots in the account storage before executing the call

Returns

quantity

The estimated gas consumption for a transaction, provided as a hexadecimal value

Request
Response
1
{
2
"jsonrpc": "2.0",
3
"id": 1,
4
"result": "0x5300"
5
}
1
{
2
"jsonrpc": "2.0",
3
"id": 1,
4
"result": "0x5300"
5
}
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