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# @atomic-port/evm
This package is for HTLC transactions between the any blockchains. HTLC allows direct transactions between different chains. Usage and examples are shown below.
## Test is now open to the public.
Transactions on each chain in this library are currently available only on the testnet.
If you wish to use it in a production environment, please change the network and other parameters.
### Deployed Contracts
#### Sepolia （TestNet）
##### native
- Endpoint: https://sepolia.infura.io/v3/85eb73cb20fc46058b5044657ed33efd
- Contract address: 0x549DEC2d00C3db272F337Ac4874503Ecf5205955
##### ERC20
- Endpoint: https://sepolia.infura.io/v3/85eb73cb20fc46058b5044657ed33efd
- Contract address: 0xbD674927a77f4Ca6f01Ac470A33747E060C3Ccd0
##### ERC721
- Endpoint: https://sepolia.infura.io/v3/85eb73cb20fc46058b5044657ed33efd
- Contract address: 0x4Bf07078493464447732B2a23126697b1C85DF9F
#### Rinkeby （TestNet）
##### native
- Endpoint: https://rpc.ankr.com/eth_rinkeby
- Contract address: 0x97ED40C207bf3B6dE4DB27E37E1989f3756E71f4
##### ERC20
- Endpoint: https://rpc.ankr.com/eth_rinkeby
- Contract address: 0x5F30A927063AA056Ee8BA93Be1175f7485c89Cac
##### ERC721
- Endpoint: https://rpc.ankr.com/eth_rinkeby
- Contract address: 0x3b1B7AB12c115148B4bbe14E8327Da6c1DfD70cd
#### Matic （TestNet）
##### native
- Endpoint: https://rpc-mumbai.maticvigil.com
- Contract address: 0x6003028E5C3FB11c5F002902dDa1E18cF6a5D34B
##### ERC20
- Endpoint: https://rpc-mumbai.maticvigil.com
- Contract address: 0xa66ffa7b45d9138e6A93bBa1f29a580bd559E5cC
##### ERC721
- Endpoint: https://rpc-mumbai.maticvigil.com
- Contract address: 0x6003028E5C3FB11c5F002902dDa1E18cF6a5D34B
## Introduction
Install the necessary libraries
**npm**
```
npm install --save web3 @atomic-port/evm
```
**yarn**
```
yarn add web3 @atomic-port/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.
## Issue a secret lock
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/lock.ts](../../examples/evm/src/native/lock.ts)
[erc20/lock.ts](../../examples/evm/src/erc20/lock.ts)
[erc721/lock.ts](../../examples/evm/src/erc721/lock.ts)
[erc20JPYC/lock.ts](../../examples/evm/src/erc20JPYC/lock.ts)
[erc20Polygon/lock.ts](../../examples/evm/src/erc20Polygon/lock.ts)
## Unlocking by Proof
With a secret lock, locked assets are withdrawn through a secret proof transaction.
[native/withDraw.ts](../../examples/evm/src/native/withDraw.ts)
[erc20/withDraw.ts](../../examples/evm/src/erc20/withDraw.ts)
[erc721/withDraw.ts](../../examples/evm/src/erc721/withDraw.ts)
[erc20JPYC/withDraw.ts](../../examples/evm/src/erc20JPYC/withDraw.ts)
[erc20Polygon/lock.ts](../../examples/evm/src/erc20Polygon/withDraw.ts)
For more detailed examples, please check the sample collection below
[examples](examples/README.md)
## More Documents
- [about ethereum](https://ethereum.org/)
