My solidity smart contract.

decent.sol

pragma solidity ^0.4.0;
// pragma experimental ABIEncoderV2;
// https://medium.com/daox/three-methods-to-transfer-funds-in-ethereum-by-means-of-solidity-5719944ed6e9

contract Decent {
    mapping (bytes32 => mapping(bytes1 => uint256)) state;
    mapping (address => bytes32) previousArticleTransactionHashMap;
    mapping (bytes32 => bytes32) previousCommentTransactionHashMap;
    mapping (bytes32 => bytes32) previousTagTransactionHashMap;
    address owner;
    
    function Decent() public {
        owner = msg.sender;
    }
    function updateState(bytes32 transactionHash, bytes1 field, uint256 value) external {
        state[transactionHash][field] = state[transactionHash][field] + value;
    }
    function getState(bytes32 transactionHash, bytes1 field) external constant returns (uint256)  {
        return state[transactionHash][field];
    }
    
    // 0, "Hello", 0xbf9eece36694d370f932d771db28eda83f9eb289092287e3d18e9093dff939c7, ["0x9cf4df7feca338c3d5957f305398db95ba3ac6b204dea352249c6b103b8efbb1"], ["0x9cf4df7feca338c3d5957f305398db95ba3ac6b204dea352249c6b103b8efbb1"]
    event PostArticleEvent(uint version, string message, bytes32 previousArticleTransactionHash);
    event PostTagEvent(bytes32 tag, bytes32 previousTagTransactionHash);
    function postArticle(uint version, string message, bytes32 previousArticleTransactionHash, bytes32[] tags, bytes32[] previousTagTransactionHashes) external {
        require(previousArticleTransactionHash !=  previousArticleTransactionHashMap[msg.sender]); // make sure there is no conflicts.
        previousArticleTransactionHashMap[msg.sender] = previousArticleTransactionHash;
        emit PostArticleEvent(version, message, previousArticleTransactionHash);
        for (uint i = 0; i < tags.length; i++) {
            previousTagTransactionHashMap[tags[i]] = previousTagTransactionHashes[i];
            emit PostTagEvent(tags[i], previousTagTransactionHashes[i]);
        }
    }
    event PostCommentEvent(uint version, bytes32 parentTransactionHash, string message, bytes32 previousCommentTransactionHash);
    function postComment(uint version, bytes32 parentTransactionHash, string message, bytes32 previousCommentTransactionHash, bytes32[] tags, bytes32[] previousTagTransactionHashes) external {
        require(previousCommentTransactionHash != previousCommentTransactionHashMap[parentTransactionHash]); // make sure there is no conflicts.
        previousCommentTransactionHashMap[parentTransactionHash] = previousCommentTransactionHash;
        emit PostCommentEvent(version, parentTransactionHash, message, previousCommentTransactionHash);
        for (uint i = 0; i < tags.length; i++) {
            previousTagTransactionHashMap[tags[i]] = previousTagTransactionHashes[i];
            emit PostTagEvent(tags[i], previousCommentTransactionHash[i]);
        }
    }
    function sendEther(bytes32 transactionHash, address postAutherAddress, uint amount1, address appAuthorAddress, uint amount2) payable external {
        state[transactionHash][0x0] = state[transactionHash][0x0] + amount1;
        if (amount1 > 0) {
            postAutherAddress.transfer(amount1);
        }
        if (amount2 > 0) {
            appAuthorAddress.transfer(amount2);
        }
    }
    function getPreviousArticleTransactionHash(address addr) external constant returns (bytes32) {
        return previousArticleTransactionHashMap[addr];
    }
    function getPreviousCommentTransactionHash(bytes32 parent) external constant returns (bytes32) {
        return previousCommentTransactionHashMap[parent];
    }
    function getPreviousTagTransactionHash(bytes32 tag) external constant returns(bytes32) {
        return previousTagTransactionHashMap[tag];
    }
}






pragma solidity ^0.4.0;
// pragma experimental ABIEncoderV2;
// https://medium.com/daox/three-methods-to-transfer-funds-in-ethereum-by-means-of-solidity-5719944ed6e9

contract Gua {
    address owner;
    mapping (bytes32 => mapping(bytes1 => uint256)) state;
    mapping (address => string) metaDataJSONStringMap;
    mapping (address => uint) currentArticleTransactionBlockNumberMap;
    mapping (bytes32 => uint) currentCommentTransactionHashMap;
    mapping (bytes32 => uint) currentTagTransactionHashMap;

    function Decent() public {
        owner = msg.sender;
    }
    function updateState(bytes32 transactionHash, bytes1 field, uint256 value) external {
        state[transactionHash][field] = state[transactionHash][field] + value;
    }
    function getState(bytes32 transactionHash, bytes1 field) external constant returns (uint256)  {
        return state[transactionHash][field];
    }
    function setMetaDataJSONStringMap(address addr, string value) external {
        metaDataJSONStringMap[addr] = value;
    }
    function getMetaDataJSONStringValue(address addr) external constant returns (string) {
        return metaDataJSONStringMap[addr];
    }
    
    event PostArticleEvent(uint version, uint timestamp, string message, bytes32 previousArticleTransactionHash);
    event PostTagEvent(bytes32 tag, bytes32 previousTagTransactionHash);
    function postArticle(uint version, uint timestamp, string message, bytes32 previousArticleTransactionHash, bytes32[] tags, bytes32[] previousTagTransactionHashes) external {
        emit PostArticleEvent(version, timestamp, message, previousArticleTransactionHash);
        currentArticleTransactionBlockNumberMap[msg.sender] = block.number;
        for (uint i = 0; i < tags.length; i++) {
            currentTagTransactionHashMap[tags[i]] = block.number;
            emit PostTagEvent(tags[i], previousTagTransactionHashes[i]);
        }
    }
    function getCurrentArticleTransactionBlockNumber(address authorAddress) external constant returns (uint) {
        return currentArticleTransactionBlockNumberMap[authorAddress];
    }
    function sendEther(bytes32 transactionHash, address postAutherAddress, uint amount1, address appAuthorAddress, uint amount2) payable external {
        state[transactionHash][0x0] = state[transactionHash][0x0] + amount1;
        if (amount1 > 0) {
            postAutherAddress.transfer(amount1);
        }
        if (amount2 > 0) {
            appAuthorAddress.transfer(amount2);
        }
    }
    
    /*
    // 0, "Hello", 0xbf9eece36694d370f932d771db28eda83f9eb289092287e3d18e9093dff939c7, ["0x9cf4df7feca338c3d5957f305398db95ba3ac6b204dea352249c6b103b8efbb1"], ["0x9cf4df7feca338c3d5957f305398db95ba3ac6b204dea352249c6b103b8efbb1"]
    event PostArticleEvent(uint version, string message, bytes32 previousArticleTransactionHash);
    event PostTagEvent(bytes32 tag, bytes32 previousTagTransactionHash);
    function postArticle(uint version, string message, bytes32 previousArticleTransactionHash, bytes32[] tags, bytes32[] previousTagTransactionHashes) external {
        require(previousArticleTransactionHash !=  previousArticleTransactionHashMap[msg.sender]); // make sure there is no conflicts.
        previousArticleTransactionHashMap[msg.sender] = previousArticleTransactionHash;
        emit PostArticleEvent(version, message, previousArticleTransactionHash);
        for (uint i = 0; i < tags.length; i++) {
            previousTagTransactionHashMap[tags[i]] = previousTagTransactionHashes[i];
            emit PostTagEvent(tags[i], previousTagTransactionHashes[i]);
        }
    }
    event PostCommentEvent(uint version, bytes32 parentTransactionHash, string message, bytes32 previousCommentTransactionHash);
    function postComment(uint version, bytes32 parentTransactionHash, string message, bytes32 previousCommentTransactionHash, bytes32[] tags, bytes32[] previousTagTransactionHashes) external {
        require(previousCommentTransactionHash != previousCommentTransactionHashMap[parentTransactionHash]); // make sure there is no conflicts.
        previousCommentTransactionHashMap[parentTransactionHash] = previousCommentTransactionHash;
        emit PostCommentEvent(version, parentTransactionHash, message, previousCommentTransactionHash);
        for (uint i = 0; i < tags.length; i++) {
            previousTagTransactionHashMap[tags[i]] = previousTagTransactionHashes[i];
            emit PostTagEvent(tags[i], previousCommentTransactionHash[i]);
        }
    }
    function getPreviousArticleTransactionHash(address addr) external constant returns (bytes32) {
        return previousArticleTransactionHashMap[addr];
    }
    function getPreviousCommentTransactionHash(bytes32 parent) external constant returns (bytes32) {
        return previousCommentTransactionHashMap[parent];
    }
    function getPreviousTagTransactionHash(bytes32 tag) external constant returns(bytes32) {
        return previousTagTransactionHashMap[tag];
    }
    */
}