Wanchain Message Bridge (WMB)

Wanchain Message Bridge (WMB) is a decentralized messaging protocol that allows messages to be transmitted between different blockchain networks, including Wanchain and other networks.

The protocol is implemented through the Wanchain Message Bridge smart contracts, which enable the transmission of messages between different chains.

The contract code mainly consists of two parts: one part is WmbGateway, and the other part is WmbApp and WmbRetryableApp.

WMB Gateway

The WMB Gateway is a smart contract that acts as an intermediary between the Wanchain Message Bridge and the external blockchain networks. It provides a secure and efficient mechanism for transferring messages between the different networks.

Deployed SC address

Testnet

Index	Chain Name	Gateway	Chain ID
1	Avalanche Fuji Testnet	0x8Ee72C8194ec8A527B1D4981742727437091C913	2147492648
2	Wanchain Testnet	0xEB14407Edc497a73934dE08D5c3079BB1F5f145D	2153201998
3	XDC Apothem Testnet	0x8c1b9daD87BFC48DF48b15baA19d0FB163030169	2147484198
4	Ethereum Sepolia Testnet	0x6c6bab7105d72c7b30bda46cb390e67a0acd8c05	2147483708
5	Arbitrum Sepolia	0x5f7778d1fd697ae79aa11e5b628d6f51d4ef7b95	1073741826
6	Optimism Sepolia	0x0c7a6313411c15cd3a0f5ffec922af3d8a1b900d	2147484262
7	polygon	0x45463b2d973bd3304a2cad1f9765b098ece4afce	2147484614
8	energi	0x9e8aafd785f8cc9aebb4b6fbf817ee988e85fede	2147493445
9	bitrock	0xd4b5f10d61916bd6e0860144a91ac658de8a1437	2154655314
10	Kanazawa(Meld Testnet)	0x30de9d1d358ff1b60fb8057235aac35e23b7650f	1073741847
11	BSC Testnet	0x7198eb89cc364cdd8c81ef6c39c597712c070ac6	2147484362

Mainnet

Index	Network	Address	Bip44 chainId
1	Polygon	0x7280E3b8c686c68207aCb1A4D656b2FC8079c033	2147484614
2	BSC	0x7280E3b8c686c68207aCb1A4D656b2FC8079c033	2147484362
3	Wanchain	0x7280E3b8c686c68207aCb1A4D656b2FC8079c033	2153201998
4	Avalanche	0x7280E3b8c686c68207aCb1A4D656b2FC8079c033	2147492648
5	Optimism	0x7280E3b8c686c68207aCb1A4D656b2FC8079c033	2147484262
6	Arbitrum	0x7280E3b8c686c68207aCb1A4D656b2FC8079c033	1073741826
7	Energi	0x7280E3b8c686c68207aCb1A4D656b2FC8079c033	2147493445
8	Bitrock	0x7280E3b8c686c68207aCb1A4D656b2FC8079c033	2154655314
9	Ethereum	0x7280E3b8c686c68207aCb1A4D656b2FC8079c033	2147483708
10	Meld	0x7280E3b8c686c68207aCb1A4D656b2FC8079c033	1073741847

WMB App

WMB App is a smart contract that can be inherited by third-party DApps to interact with the WMB Gateway. It provides a customizable interface for interacting with the WMB Gateway and handling incoming messages.

WMB Retryable App

WMB Retryable App is a smart contract that can be inherited by third-party DApps to interact with the WMB Gateway. It provides a customizable interface for interacting with the WMB Gateway and handling incoming messages. It also provides a retry mechanism for handling failed messages.

Compile & Test

// SPDX-License-Identifier: MIT
pragma solidity 0.8.18;
import "@wandevs/message/contracts/app/WmbApp.sol";

contract MyContract is WmbApp {
    
    constructor(address admin, address _wmbGateway) WmbApp() {
        initialize(admin, _wmbGateway);
        // 你的初始化代码
    }

    function _wmbReceive(
        bytes calldata data,
        bytes32 messageId,
        uint256 fromChainId,
        address fromSC
    ) internal override {
		// do something you want...
    }

    function sendMessage(
        uint256 toChainId, address toAddress, 
        bytes memory msgData, uint256 gasLimit) public payable {
        uint256 fee = estimateFee(toChainId, gasLimit);
        require(msg.value >= fee, "Insufficient fee");
        _dispatchMessage(toChainId, toAddress, msgData, msg.value);
    }

    function sendMessageBatch(
        uint256 toChainId, Message[] memory messages, uint256 gasLimit) 
        public payable {
        uint256 fee = estimateFee(toChainId, gasLimit);
        require(msg.value >= fee, "Insufficient fee");
        _dispatchMessageBatch(toChainId, messages, msg.value);
    }
}

Sandbox Environment

Check sandbox.md for more details.