Gas Limit#

Retrieve estimated Gas Limit consumption through pre-execution of transaction information. Currently supports only EVM networks.

Request Path#

POST https://www.okx.com/api/v5/wallet/pre-transaction/gas-limit

Request Parameters#

Parameter	Type	Required	Description
chainIndex	String	Yes	Unique identifier for the chain
fromAddr	String	Yes	From address
toAddr	String	Yes	To address
txAmount	String	No	Amount of main chain coins for the transaction. Default is 0. Required for mainnet transfers to calculate gaslimit properly，passed in the smallest unit of the mainnet coin, such as ETH wei.
extJson	Object	No	Additional parameters for calldata and other information

extJson

Parameter	Type	Required	Description
inputData	String	No	Calldata

Response Parameters#

Parameter	Type	Description
gasLimit	String	Estimated gas limit

Request Example#

shell

curl --location --request POST 'https://www.okx.com/api/v5/wallet/pre-transaction/gas-limit' \
--header 'Content-Type: application/json' \
--header 'OK-ACCESS-PROJECT: 86af********d1bc' \
--header 'OK-ACCESS-KEY: 37c541a1-****-****-****-10fe7a038418' \
--header 'OK-ACCESS-SIGN: leaV********3uw=' \
--header 'OK-ACCESS-PASSPHRASE: 1****6' \
--header 'OK-ACCESS-TIMESTAMP: 2023-10-18T12:21:41.274Z' \
--data-raw '{
    "fromAddr": "0x383c8208b4711256753b70729ba0cf0cda55efad",
    "toAddr": "0x4ad041bbc6fa102394773c6d8f6d634320773af4",
    "txAmount": "31600000000000000",
    "chainIndex": "3",
    "extJson": {
        "inputData":"041bbc6fa102394773c6d8f6d634320773af4"
    }
}'

Response Example#

200

{
    "code": "0",
    "data": [
        {
            "gasLimit": "652683"
        }
    ],
    "msg": ""
}