remix	https://remix.ethereum.org/
ana	https://testnet.analog.one/#/quests
discord  领水            https://discord.com/channels/860069399627825163/1139090696175886376
shibuya 领水	https://portal.astar.network/shibuya-testnet/assets
认证	https://shibuya.blockscout.com/contract-verification
sep认证	https://eth-sepolia.blockscout.com/contract-verification

sp灵水       https://cloud.google.com/application/web3/faucet/ethereum/sepolia

0x000000007f56768dE3133034FA730a909003a165

0xa7ef4ebd000000000000000000000000f871c929be8cd8382148c69053ce5ed1a9593ea700000000000000000000000000000000000000000000000000000000000000070000000000000000000000000000000000000000000000000000000000007530000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000010100000000000000000000000000000000000000000000000000000000000000


代码：

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IGmpReceiver {
    function onGmpReceived(bytes32 id, uint128 network, bytes32 source, bytes calldata payload)
        external
        payable
        returns (bytes32);
}

contract Counter is IGmpReceiver {
    address private immutable _gateway;
    uint256 public number;

    // example gw 0x000000007f56768de3133034fa730a909003a165
    constructor(address gateway) {
        _gateway = gateway;
    }

    function onGmpReceived(bytes32, uint128, bytes32, bytes calldata) external payable returns (bytes32) {
        require(msg.sender == _gateway, "unauthorized");
        number++;
        return bytes32(number);
    }
}