approveCall

approveCall(options): OutputType

Defined in: packages/synapse-core/src/erc20/approve.ts:194

Create a call to the approve function

This function is used to create a call to the approve function for use with sendCalls, sendTransaction, multicall, estimateContractGas, or simulateContract.

Parameters

Parameter	Type	Description
options	{ amount: bigint; chain: Chain; spender?: `0x${string}`; token?: `0x${string}`; }	approveCall.OptionsType
options.amount	bigint	The amount to approve (in token base units).
options.chain	Chain	The chain to use to make the call.
options.spender?	`0x${string}`	The address of the spender to approve. If not provided, the Filecoin Pay contract address will be used.
options.token?	`0x${string}`	The address of the ERC20 token to approve. If not provided, the USDFC token address will be used.

Returns

OutputType

The call to the approve function approveCall.OutputType

Throws

Errors approveCall.ErrorType

Example

import { approveCall } from '@filoz/synapse-core/erc20'
import { createWalletClient, http, parseUnits } from 'viem'
import { privateKeyToAccount } from 'viem/accounts'
import { simulateContract } from 'viem/actions'
import { calibration } from '@filoz/synapse-core/chains'

const account = privateKeyToAccount('0x...')
const client = createWalletClient({
  account,
  chain: calibration,
  transport: http(),
})

// Use with simulateContract
const { request } = await simulateContract(client, approveCall({
  chain: calibration,
  amount: parseUnits('100', 18),
}))

console.log(request)