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Classic Swap
API version: 6.1
Introduction
Quick start
Methods
Find the best quote to swap with 1inch Router GET
Generate calldata to swap on 1inch Router GET
Address of the 1inch Router that is trusted to spend funds for the swap GET
Generate approve calldata to allow 1inch Router to perform a swap GET
Get the number of tokens that the 1inch Router is allowed to swap GET
List of liquidity sources that are available for routing in the 1inch Aggregation Protocol GET
List of tokens that are available for swap in the 1inch Aggregation protocol GET
Migration
Migration from v5.0 to v5.2
Migration from v5.2 to v6.0
Migration from v6.0 to v6.1
Docs·APIs·Swap API·Classic Swap·Methods·6.1·Generate approve calldata to allow 1inch Router to perform a swap

Generate approve calldata to allow 1inch Router to perform a swap

GEThttps://api.1inch.com/swap/v6.1/{chain}/approve/transaction
Supported on:
ArbitrumAvalancheBaseBNB ChainZKsyncEthereumGnosisOptimismPolygonLineaSonicUnichain

Parameters

chain
* number path
tokenAddress
* string query
Token address you want to swap
amount
string query
The number of tokens that the 1inch Router is allowed to swap.If not specified, it will be allowed to spend an infinite amount of tokens.

Request Body

This request doesn’t have any request body.

1

Returns

200
ApproveCallDataResponse object
data
* string
The encoded data to call the approve method on the swapped token contract
gasPrice
* string
Network high gas price in wei
to
* string
Token address that will be allowed to exchange through 1inch Router
value
* string
Native token value in wei (for approve is always 0)
JSON
1

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