Open2024/02/03にコメント追加2

Blastメモ

Solidity

ぽけな

https://docs.blast.io/about-blast

情報メモ

Blastからトークンを引き出すには14日間かかる

Receive and claim ETH yield

BlastはNativeでステーキング機能が実装されており、モードが3つある

Void(Defauilt)

デフォルトの動作
ステーキングしない(ただコントラクトに預けてるだけ)

Automatic

ステーキングする(コントラクトの残高が増えていく)
例：1ETH預けておくと、1年後には1.04ETHになる(年利4%)

Claimable

ステーキングする(コントラクトの残高は増えないが、別途Claimできる)
例：1ETH預けておくと、1年後もコントラクトの残高は1ETHのままだが、別途0.04ETHをClaimできる

どうやってモードを設定するのか？

IBlast Interfaceをコールして設定する
例えば、Automaticを設定したければ、コンストラクタ内でconfigureAutomaticYield()をコールする
IBlastの本体は0x4300000000000000000000000000000000000002らしい

enum YieldMode {
    AUTOMATIC,
    VOID,
    CLAIMABLE
}

enum GasMode {
    VOID,
    CLAIMABLE 
}

interface IBlast{
    // configure
    function configureContract(address contractAddress, YieldMode _yield, GasMode gasMode, address governor) external;
    function configure(YieldMode _yield, GasMode gasMode, address governor) external;

    // base configuration options
    function configureClaimableYield() external;
    function configureClaimableYieldOnBehalf(address contractAddress) external;
    function configureAutomaticYield() external;
    function configureAutomaticYieldOnBehalf(address contractAddress) external;
    function configureVoidYield() external;
    function configureVoidYieldOnBehalf(address contractAddress) external;
    function configureClaimableGas() external;
    function configureClaimableGasOnBehalf(address contractAddress) external;
    function configureVoidGas() external;
    function configureVoidGasOnBehalf(address contractAddress) external;
    function configureGovernor(address _governor) external;
    function configureGovernorOnBehalf(address _newGovernor, address contractAddress) external;

    // claim yield
    function claimYield(address contractAddress, address recipientOfYield, uint256 amount) external returns (uint256);
    function claimAllYield(address contractAddress, address recipientOfYield) external returns (uint256);

    // claim gas
    function claimAllGas(address contractAddress, address recipientOfGas) external returns (uint256);
    function claimGasAtMinClaimRate(address contractAddress, address recipientOfGas, uint256 minClaimRateBips) external returns (uint256);
    function claimMaxGas(address contractAddress, address recipientOfGas) external returns (uint256);
    function claimGas(address contractAddress, address recipientOfGas, uint256 gasToClaim, uint256 gasSecondsToConsume) external returns (uint256);

    // read functions
    function readClaimableYield(address contractAddress) external view returns (uint256);
    function readYieldConfiguration(address contractAddress) external view returns (uint8);
    function readGasParams(address contractAddress) external view returns (uint256 etherSeconds, uint256 etherBalance, uint256 lastUpdated, GasMode);
}

ぽけな

こんな感じでただのNFTコントラクトにClimableモードを設定してみた。

// SPDX-License-Identifier: MIT 
pragma solidity ^0.8.20;

import {ERC721} from "openzeppelin-contracts/contracts/token/ERC721/ERC721.sol";
import {Ownable} from "openzeppelin-contracts/contracts/access/Ownable.sol";
import {IBlast} from "./IBlast.sol";

contract ClaimableYieldNFT is ERC721, Ownable {
    constructor() ERC721("NFT", "NFT") Ownable(msg.sender) {
        IBlast(0x4300000000000000000000000000000000000002).configureClaimableYield();
    }

    uint256 private _ids = 0;

    function mint() external {
        _mint(msg.sender, _ids);
        _ids++;
    }

    function claimYield(address recipient, uint256 amount) external {
	    //This function is public meaning anyone can claim the yield
		IBlast(0x4300000000000000000000000000000000000002).claimYield(address(this), recipient, amount);
    }

	function claimAllYield(address recipient) external {
	    //This function is public meaning anyone can claim the yield
	    IBlast(0x4300000000000000000000000000000000000002).claimAllYield(address(this), recipient);
    }

    function readClimableYield() external view returns (uint256) {
        return IBlast(0x4300000000000000000000000000000000000002).readClaimableYield(address(this));
    }

    function withdraw() external onlyOwner {
        //This function is public meaning anyone can withdraw the ETH
        payable(msg.sender).transfer(address(this).balance);
    }

    receive() external payable {
        //This function is public meaning anyone can send ETH to the contract
    }
}

コントラクトに0.5ETHデポジットした後しばらく待つと、こんな感じでClaimできるようになってた

ちなみに、メインネットでは1日おき、テストネットでは1時間ごとに値が更新されるらしい