ERC-1363 पेयबल टोकन मानक

pragma solidity ^0.8.0;

/**
 * @title ERC1363
 * @dev An extension interface for ERC-20 tokens that supports executing code on a recipient contract
 * after `transfer` or `transferFrom`, or code on a spender contract after `approve`, in a single transaction.
 */
interface ERC1363 is ERC20, ERC165 {
  /*
   * NOTE: the ERC-165 identifier for this interface is 0xb0202a11.
   * 0xb0202a11 ===
   *   bytes4(keccak256('transferAndCall(address,uint256)')) ^
   *   bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
   *   bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
   *   bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)')) ^
   *   bytes4(keccak256('approveAndCall(address,uint256)')) ^
   *   bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
   */

  /**
   * @dev Moves a `value` amount of tokens from the caller's account to `to`
   * and then calls `ERC1363Receiver::onTransferReceived` on `to`.
   * @param to The address to which tokens are being transferred.
   * @param value The amount of tokens to be transferred.
   * @return A boolean value indicating the operation succeeded unless throwing.
   */
  function transferAndCall(address to, uint256 value) external returns (bool);

  /**
   * @dev Moves a `value` amount of tokens from the caller's account to `to`
   * and then calls `ERC1363Receiver::onTransferReceived` on `to`.
   * @param to The address to which tokens are being transferred.
   * @param value The amount of tokens to be transferred.
   * @param data Additional data with no specified format, sent in call to `to`.
   * @return A boolean value indicating the operation succeeded unless throwing.
   */
  function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool);

  /**
   * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
   * and then calls `ERC1363Receiver::onTransferReceived` on `to`.
   * @param from The address from which to send tokens.
   * @param to The address to which tokens are being transferred.
   * @param value The amount of tokens to be transferred.
   * @return A boolean value indicating the operation succeeded unless throwing.
   */
  function transferFromAndCall(address from, address to, uint256 value) external returns (bool);

  /**
   * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
   * and then calls `ERC1363Receiver::onTransferReceived` on `to`.
   * @param from The address from which to send tokens.
   * @param to The address to which tokens are being transferred.
   * @param value The amount of tokens to be transferred.
   * @param data Additional data with no specified format, sent in call to `to`.
   * @return A boolean value indicating the operation succeeded unless throwing.
   */
  function transferFromAndCall(address from, address to, uint256 value, bytes calldata data) external returns (bool);

  /**
   * @dev Sets a `value` amount of tokens as the allowance of `spender` over the caller's tokens
   * and then calls `ERC1363Spender::onApprovalReceived` on `spender`.
   * @param spender The address which will spend the funds.
   * @param value The amount of tokens to be spent.
   * @return A boolean value indicating the operation succeeded unless throwing.
   */
  function approveAndCall(address spender, uint256 value) external returns (bool);

  /**
   * @dev Sets a `value` amount of tokens as the allowance of `spender` over the caller's tokens
   * and then calls `ERC1363Spender::onApprovalReceived` on `spender`.
   * @param spender The address which will spend the funds.
   * @param value The amount of tokens to be spent.
   * @param data Additional data with no specified format, sent in call to `spender`.
   * @return A boolean value indicating the operation succeeded unless throwing.
   */
  function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool);
}

interface ERC20 {
  event Transfer(address indexed from, address indexed to, uint256 value);
  event Approval(address indexed owner, address indexed spender, uint256 value);
  function transfer(address to, uint256 value) external returns (bool);
  function transferFrom(address from, address to, uint256 value) external returns (bool);
  function approve(address spender, uint256 value) external returns (bool);
  function totalSupply() external view returns (uint256);
  function balanceOf(address account) external view returns (uint256);
  function allowance(address owner, address spender) external view returns (uint256);
}

interface ERC165 {
  function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

/**
 * @title ERC1363Receiver
 * @dev Interface for any contract that wants to support `transferAndCall` or `transferFromAndCall` from ERC-1363 token contracts.
 */
interface ERC1363Receiver {
  /**
   * @dev Whenever ERC-1363 tokens are transferred to this contract via `ERC1363::transferAndCall` or `ERC1363::transferFromAndCall`
   * by `operator` from `from`, this function is called.
   *
   * NOTE: To accept the transfer, this must return
   * `bytes4(keccak256("onTransferReceived(address,address,uint256,bytes)"))`
   * (i.e. 0x88a7ca5c, or its own function selector).
   *
   * @param operator The address which called `transferAndCall` or `transferFromAndCall` function.
   * @param from The address which are tokens transferred from.
   * @param value The amount of tokens transferred.
   * @param data Additional data with no specified format.
   * @return `bytes4(keccak256("onTransferReceived(address,address,uint256,bytes)"))` if transfer is allowed unless throwing.
   */
  function onTransferReceived(address operator, address from, uint256 value, bytes calldata data) external returns (bytes4);
}

/**
 * @title ERC1363Spender
 * @dev Interface for any contract that wants to support `approveAndCall` from ERC-1363 token contracts.
 */
interface ERC1363Spender {
  /**
   * @dev Whenever an ERC-1363 tokens `owner` approves this contract via `ERC1363::approveAndCall`
   * to spend their tokens, this function is called.
   *
   * NOTE: To accept the approval, this must return
   * `bytes4(keccak256("onApprovalReceived(address,uint256,bytes)"))`
   * (i.e. 0x7b04a2d0, or its own function selector).
   *
   * @param owner The address which called `approveAndCall` function and previously owned the tokens.
   * @param value The amount of tokens to be spent.
   * @param data Additional data with no specified format.
   * @return `bytes4(keccak256("onApprovalReceived(address,uint256,bytes)"))` if approval is allowed unless throwing.
   */
  function onApprovalReceived(address owner, uint256 value, bytes calldata data) external returns (bytes4);
}