Ethereum: What are the correct units and parameters for creating swap call data with the 1-inch API?

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Here is an article about Ethereum: What are the correct units and parameters to generate swap calldata using the 1inch API:

Generating Ethereum Swap Calldata Using the 1inch API: Understanding Units, Parameters, and Best Practices

The 1inch API provides a convenient way to build decentralized exchange (DEX) applications without requiring extensive knowledge of Solidity or other programming languages. One of the key features of the 1inch API is its ability to generate swap calldata for various use cases, including swaps, limits, and liquidity provision protocols (LPPs). However, generating correct swap calldata can be tricky, especially when it comes to selecting the right units and parameters.

Understanding Ethereum Units

In Solidity, the native unit of Ethereum is Ether (ETH), which represents one of the most widely used cryptocurrencies. When working with 1inch, you may encounter other Ethereum units, such as Wei tokens (WETH) or etherum (ETH).

Here are some basics about these units:

• Ether (ETH): The native cryptocurrency of the Ethereum blockchain.

• Wei (WETH): A unit of Ether used for liquidity provision on decentralized exchanges.

• etherum(ETH): A unit of Ether used in the 1inch API, representing a single unit of ETH.

Correct Units and Parameters for Swapping

To generate correct swap call data, you need to select the correct units and parameters. Here’s what you need to know:

• Swap Amount (SWAP)

  : The amount of one or more assets being swapped.

• Token Amounts (TOS): The number of tokens involved in the swap, where TOS represents the amount of token A being exchanged for asset B.

• Limit Inputs (LI) and
  Input Parameters (IP): These are used to define the parameters of a Liquidity Providing Protocol (LPP) or Limit Order.

When using the 1inch API, you can select units such as Ether (ETH), Wei (WETH), or Ethereum (ETH). The correct parameters to generate swap call data depend on your use case and the specific requirements of your DEX application.

Example: Generating Swap Call Data with WeI Units

Suppose you want to generate swap call data for a swap between two assets, A and B. You can select wei units (WETH) for assets A and B.

pragma solidity ^0.8.0;
import "
contract Swap {
using SafeERC20 for (erc20) SafeERC20;
public constant address BASE_A = 100 * wether;
public constant address BASE_B = 100 * time;
// ... other variables and functions ...
function swap(
uint _swapAmountA,
uint _swapAmountB
) public {
// Generate swap call data using wei units
call data swapValueA, swapValueB;
calldata tokenAmountAB = _swapAmountA / BASE_A;
calldata tokenAmountBA = _swapAmountB / BASE_B;
// ... perform the swap ...
pay(BaseA).call{value: swapValueA * tokenAmountAB} ether;
pay(BaseB).call{value: swapValueB * tokenAmountBA} ether;
//Update the base values
BaseA = BASE_A - _swapAmountA / BASE_A;
BaseB = BASE_B - _swapAmountB / BASE_B;
}
}

Example: Generating swap call data with wei units

To generate swap call data using wei units, you can use the following example:

“`solidity

pragma solidity ^0.8.0;

import “

contract Swap {

using SafeERC20 for (erc20) SafeERC20;

address public constant BASE_A = 100 * wei();

address public constant BASE_B = 100 * wei();

// … other variables and functions …