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Contract Address Details

0x951c68F7c59c355581Efb8381C2f1B3cD1CF23E2

Product >= 4 Incoming Transactions Last Balance Update: Block #2494964
Created by 0x45bb–cc14f6 at 0x8af9–df0c45

Balance

0 Ether

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Contract name:
Product




Optimization enabled
false
Compiler version
v0.5.4+commit.9549d8ff




Contract source code

/**
* Submitted for verification at blockscout.com on 2023-12-19 22:25:48.975583Z
*/
pragma solidity ^0.5.4;
contract Product {
    address private owner;
    string public productString;
    string public productName; /*作物批號*/
    string public farm; /*農場*/
    bytes32 public latestHash;
    event hash(
        bytes32 latestHash
        );
    constructor(string memory _farm, string memory _productName) public{
        owner = msg.sender;
        farm = _farm;
        productName = _productName;
        productString = string(abi.encodePacked('farm=', farm, '&product=', productName));
        latestHash = keccak256(bytes(productString));
        emit hash(latestHash);
    }
    
    function getProductString() public view returns(string memory) {
        return productString;
    }
    
    
    struct row {
        uint64 timestamp; /*UNIX時間格式*/
        string task; /*工作項目*/
        string location; /*地點*/
        string tool; /*工具*/
        string tool_type; /*工具類別*/
        string remark; /*備註*/
        bytes32 prev_hash; /*前一筆資料的hash*/
    }
    
    
    
    function rowToEncode(row memory x) private pure returns(bytes memory) {
        uint16 version = 1;
        bytes memory encoded_row = abi.encodePacked(
            abi.encodePacked(
                version,
                stringToSelector('timestamp'), abi.encodePacked(x.timestamp),
                stringToSelector('task'), keccak256(bytes(x.task)),
                stringToSelector('location'), keccak256(bytes(x.location))
            ),
            abi.encodePacked(
                stringToSelector('tool'), keccak256(bytes(x.tool)),
                stringToSelector('tool_type'), keccak256(bytes(x.tool_type)),
                stringToSelector('remark'), keccak256(bytes(x.remark))
            ),
            x.prev_hash
        );
        return encoded_row;
    }
    
    function stringToSelector(string memory x) private pure returns(bytes4) {
        return(bytes4(keccak256(bytes(x))));
    }
    function addRow (
        uint64 _timestampe,
        string calldata _task,
        string calldata _location,
        string calldata _tool,
        string calldata _tool_type,
        string calldata _remark
    ) external {
        require(msg.sender == owner);
        row memory newRow = row(_timestampe,
                        _task,
                        _location,
                        _tool,
                        _tool_type,
                        _remark,
                        latestHash);
        latestHash = keccak256(rowToEncode(newRow));
        emit hash(latestHash);
    }
    
}

Contract ABI

[{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"string","name":""}],"name":"farm","inputs":[],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"addRow","inputs":[{"type":"uint64","name":"_timestampe"},{"type":"string","name":"_task"},{"type":"string","name":"_location"},{"type":"string","name":"_tool"},{"type":"string","name":"_tool_type"},{"type":"string","name":"_remark"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"bytes32","name":""}],"name":"latestHash","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"string","name":""}],"name":"productName","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"string","name":""}],"name":"productString","inputs":[],"constant":true},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"string","name":""}],"name":"getProductString","inputs":[],"constant":true},{"type":"constructor","stateMutability":"nonpayable","payable":false,"inputs":[{"type":"string","name":"_farm"},{"type":"string","name":"_productName"}]},{"type":"event","name":"hash","inputs":[{"type":"bytes32","name":"latestHash","indexed":false}],"anonymous":false}]

Contract Byte Code

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