Approve Transaction

post

https://api.kiln.fi/v1/defi/transaction/approve

Generates an approval transaction that allows a specified vault to deposit a given ERC20 asset on behalf of the user. This is a prerequisite for interacting with Kiln DeFi Vaults as they require asset allowances before deposits.

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Body Params

Payload containing the necessary parameters to craft the approval transaction.

wallet

string

required

The Ethereum address of the user initiating the approval.

asset

string

required

The contract address of the ERC20 token being approved for deposit. For Kiln DeFi It will be the asset address you will get from the /network-stats route for the vault you want to deposit into.

chain_id

integer

required

The unique identifier of the blockchain network where the transaction is executed (e.g., 1 for Ethereum Mainnet).

vault

string

required

The contract address of the vault that will receive the asset deposit authorization.

amount

string

required

Amount to approve in the lowest unit of the asset (ie amount * 10**asset_decimals)

skip_gas_estimation

boolean

Defaults to false

If true, bypasses existing approval checks and proceeds with creating a new approval transaction regardless of current allowance.

Responses

204

The amount is already approved

401

Unauthorized

500

Internal server error

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Response

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200Successful operation

422Invalid parameters