NFT質押代幣分紅dapp系統開發功能|合約定製案例
Validator – 主鏈/子鏈共識系統的參與者。透過存50000BU到主鏈中就能成為一名驗證者。
Active validator set - 那些開發I34-合約I633-部署53I9,當前正在參與的驗證者以及尋求產生以及證明區塊,跨鏈路和其他共識物件的驗證者。
Committee - 從活躍驗證者集合中(偽)隨機抽樣的子集。當一個委員會被集體提及時,如“該委員會證明X”,這種假定為“該委員會的某個子集包含足夠的驗證者,該協議承認其代表委員會”。
Proposer - 建立一個區塊的驗證者
Attester -在區塊上簽名的委員會中的一名驗證者
Main chain – 主鏈是分片系統的基礎
Shard chain - 進行交易和儲存賬戶資料的鏈之一
Observer client -監控分片並儲存指定分片的全資料以及主鏈的全狀態
* @dev See `IERC20.transfer`. * * Unlike `send`, `recipient` is _not_ required to implement the `tokensReceived` * interface if it is a contract. * * Also emits a `Sent` event. */ function transfer(address recipient, uint256 amount) external returns (bool) { return _transfer(recipient, amount); } function _transfer(address recipient, uint256 amount) internal returns (bool) { require(recipient != address(0), "ERC777: transfer to the zero address"); address from = msg.sender; _callTokensToSend(from, from, recipient, amount, "", ""); _move(from, from, recipient, amount, "", ""); _callTokensReceived(from, from, recipient, amount, "", "", false); return true; } /** * @dev See `IERC777.burn`. * * Also emits a `Transfer` event for ERC20 compatibility. */ function burn(uint256 amount, bytes calldata data) external { _burn(msg.sender, msg.sender, amount, data, ""); } /** * @dev See `IERC777.isOperatorFor`. */ function isOperatorFor( address operator, address tokenHolder ) public view returns (bool) { return operator == tokenHolder || _operators[tokenHolder][operator]; } /** * @dev See `IERC777.authorizeOperator`. */ function authorizeOperator(address operator) external { require(msg.sender != operator, "ERC777: authorizing self as operator"); _operators[msg.sender][operator] = true; emit AuthorizedOperator(operator, msg.sender); } /** * @dev See `IERC777.revokeOperator`. */ function revokeOperator(address operator) external { require(operator != msg.sender, "ERC777: revoking self as operator"); delete _operators[msg.sender][operator]; emit RevokedOperator(operator, msg.sender); } /** * @dev See `IERC777.defaultOperators`. */ function defaultOperators() external view returns (address[] memory) { return _defaultOperatorsArray; } /** * @dev See `IERC777.operatorSend`. * * Emits `Sent` and `Transfer` events. */ function operatorSend( address sender, address recipient, uint256 amount, bytes calldata data, bytes calldata operatorData ) external { require(isOperatorFor(msg.sender, sender), "ERC777: caller is not an operator for holder"); _send(msg.sender, sender, recipient, amount, data, operatorData, true); } /** * @dev See `IERC777.operatorBurn`. * * Emits `Sent` and `Transfer` events. */ function operatorBurn(address account, uint256 amount, bytes calldata data, bytes calldata operatorData) external { require(isOperatorFor(msg.sender, account), "ERC777: caller is not an operator for holder"); _burn(msg.sender, account, amount, data, operatorData); } /** * @dev See `IERC20.allowance`. * * Note that operator and allowance concepts are orthogonal: operators may * not have allowance, and accounts with allowance may not be operators * themselves. */ function allowance(address holder, address spender) external view returns (uint256) { return _allowances[holder][spender]; } /** * @dev See `IERC20.approve`. * * Note that accounts cannot have allowance issued by their operators. */ function approve(address spender, uint256 value) external returns (bool) { address holder = msg.sender; _approve(holder, spender, value); return true; } /** * @dev See `IERC20.transferFrom`. * * Note that operator and allowance concepts are orthogonal: operators cannot * call `transferFrom` (unless they have allowance), and accounts with * allowance cannot call `operatorSend` (unless they are operators). * * Emits `Sent` and `Transfer` events. */ function transferFrom(address holder, address recipient, uint256 amount) external returns (bool) { return _transferFrom(holder, recipient, amount); } function _transferFrom(address holder, address recipient, uint256 amount) internal returns (bool) { require(recipient != address(0), "ERC777: transfer to the zero address"); require(holder != address(0), "ERC777: transfer from the zero address"); address spender = msg.sender; _callTokensToSend(spender, holder, recipient, amount, "", ""); _move(spender, holder, recipient, amount, "", ""); _approve(holder, spender, _allowances[holder][spender].sub(amount)); _callTokensReceived(spender, holder, recipient, amount, "", "", false); return true; }
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