Блокчейн-платформа
для безопасных сделок

// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; contract Escrow { address public buyer; address public seller; address public arbitrator; uint256 public amount; bool public completed; bool public disputed; mapping(address => bool) public confirmations; constructor(address _seller, address _arbitrator) payable { buyer = msg.sender; seller = _seller; arbitrator = _arbitrator; amount = msg.value; } function confirmDelivery() external { require(msg.sender == buyer, "Only buyer can confirm"); confirmations[buyer] = true; if (confirmations[seller]) { completed = true; payable(seller).transfer(amount); } } function confirmReceipt() external { require(msg.sender == seller, "Only seller can confirm"); confirmations[seller] = true; if (confirmations[buyer]) { completed = true; payable(seller).transfer(amount); } } function dispute() external { require(msg.sender == buyer || msg.sender == seller, "Only parties can dispute"); disputed = true; } function resolveDispute(address winner) external { require(msg.sender == arbitrator, "Only arbitrator can resolve"); require(disputed, "No dispute active"); payable(winner).transfer(amount); completed = true; } }