Content

Ethereum SplitSend contract

SplitSend.sol - contract to allow batching payments of ERC20 or Ethers as well as execute function calls to a specific target contract.

This is useful for

• direct payment of multiple recipient addresses
• calling a smart contract function (such as withdrawing from a liquidity pool or a call to a dex exchange) and split the resulting payment to multiple recipients in one go.

The solidity code is here.

The contract contains 2 functions to split ethereum or ERC20 tokens and send as a batch, while also allowing to execute a target contract with the payload.

The functions are:

• function sendEtherToMultipleBeneficiaries(address targetContract, bytes calldata targetMessage, Payment[] calldata _payments) external payable nonReentrant

  • Send ethers to an array of payment struct of payable address and amount.
  • Amount of ether sent to this contract must equal the sum of payment amount of all beneficiaries or entire transaction is reverted.

• function sendTokenToMultipleBeneficiaries(address targetContract, bytes calldata targetMessage, address tokenAddress, Payment[] calldata _payments) external payable nonReentrant

  • Send ERC20 tokens to an array of payment struct of payable address and amount.
  • The msg.sender must approve this contract to spend at least the total sum of payment amount of all beneficiaries.

Usage

Install the package npm install @sytherax/eth-batcher-contracts in your contracts npm folder.

And use it in your contract for example:

pragma solidity ^0.8.0;
import "@sytherax/eth-batcher-contracts/contracts/SplitSend.sol";

contract MyContract is SplitSend { }

Building

Install Dependencies

npm install

Contract Deployment

If running locally you can execute to deploy all deployments inside deploy folder to localhost network like follows.

npx hardhat deploy --network localhost

If you want to deploy test contracts for the web3 examples to run. You can run all deploys with the tag dev

npx hardhat deploy --network localhost --tags dev

For mainnet launch, you would want to do something like follows:

npx hardhat deploy --network mainnet --tags prod

Testing

npm test