README.md

@layerswap/evm

This package is for HTLC transactions between the any blockchains. HTLC allows direct transactions between different chains. Usage and examples are shown below.

Deployed Contracts

Sepolia（TestNet）

native

• Endpoint: https://sepolia.etherscan.io/address/0x9b2e421e5F516bcC991A355E8712af72621C54dF
• Contract address: 0x9b2e421e5F516bcC991A355E8712af72621C54dF

ERC20

• Endpoint: https://sepolia.etherscan.io/address/0x2F16E9D5bd67F30AB355369413cA94d858FbDd91
• Contract address: 0x2F16E9D5bd67F30AB355369413cA94d858FbDd91

ERC20 Token

• Endpoint: https://sepolia.etherscan.io/address/0xe2E65a43dC5616B1e28472DfD72F40D3a4f81c6E
• Contract address: 0xe2E65a43dC5616B1e28472DfD72F40D3a4f81c6E

Introduction

Install the necessary libraries

npm

npm install --save web3 @layerswap/evm

yarn

yarn add web3 @layerswap/evm

HTLC issues a secret and key in advance and uses this to issue a secret lock.

When both parties agree to the transaction, the secret and key are exchanged separately, and the key is used to receive a token. This is how the cross-chain swap is performed.

Create HTLC contract

You can publish using this package with the following operations.

The output hashPair contains a secret and a proof. The secret is shared in advance, and the proof is issued at a mutually agreed timing.

native/create-htlc.ts

erc20/lock.ts

Issue a secret lock (aka hashlock)

lock.ts

Unlocking by Proof

With a secret lock, locked assets are withdrawn through a secret proof transaction.

native/withdraw.ts

erc20/withdraw.ts

Batch Withdraw

To withdraw multiple HTLCs in a batch.

native/batc.ts

erc20/withdraw.ts

For more detailed examples, please check the sample collection below

examples

More Documents

• about ethereum