本文主要是介绍[某区块链全栈基础]tezos_michelson+conseiljs，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
接触了皮毛的michelson之后，一直想写非常皮毛的dapp。但是前端实在没啥基础。这时候发现了这篇好文，很好的给初学者展示了一个dapp的脉络（安装conseiljs里面还有更多的范例）。
https://medium.com/the-cryptonomic-aperiodical/starting-with-smartpy-part-6-creating-a-dapp-4f169ebb2558
文中关于查询block的代码，部分有些老旧。以下是目前可以跑通的版本。
index.js:
const serverInfo = {url: 'https://conseil-dev.cryptonomic-infra.tech:443',apiKey: '申请一个自己的cloud账号吧'
};function refreshTable(blocks = []) {const tableRef = document.getElementById('query-table').getElementsByTagName('tbody')[0];tableRef.innerHTML = '';blocks.map((block, index) => {const row = tableRef.insertRow(index);const cell1 = row.insertCell(0);const cell2 = row.insertCell(1);const cell3 = row.insertCell(2);cell1.innerHTML = block.level;cell2.innerHTML = new Date(block.timestamp).toLocaleString();cell3.innerHTML = block.hash;});
}async function getBlocks(network, query) {const blocks = await conseiljs.TezosConseilClient.getBlocks(serverInfo, network, query);refreshTable(blocks);
}function onClickGo(event) {event.preventDefault();const order = document.getElementById('order-select').value;const limit = parseInt(document.getElementById('limit-input').value);let query = conseiljs.ConseilQueryBuilder.blankQuery();query = conseiljs.ConseilQueryBuilder.addFields(query, 'level', 'timestamp', 'hash');query = conseiljs.ConseilQueryBuilder.addOrdering(query, 'level', order);query = conseiljs.ConseilQueryBuilder.setLimit(query, limit);getBlocks('babylonnet', query); //被改成了babylonnet
}async function fetchMetadata() {const platformResult = await conseiljs.ConseilMetadataClient.getPlatforms(serverInfo);const platform = platformResult[0]['name'];const networksResult = await conseiljs.ConseilMetadataClient.getNetworks(serverInfo, platform);const network = networksResult[0]['name'];const entityResult = await conseiljs.ConseilMetadataClient.getEntities(serverInfo, platform, network);const blocks = Array.from(entityResult).filter(v => v['name'] === 'blocks')[0]['name'];const attributeResult = await conseiljs.ConseilMetadataClient.getAttributes(serverInfo, platform, network, blocks);
}document.onreadystatechange = function () {if(document.readyState === "complete"){fetchMetadata();}
}再者针对智能合约的代码，也有一处修改：
smartPy.html:
<html><head><script src="https://cdn.jsdelivr.net/gh/cryptonomic/conseiljs/dist-web/conseiljs.min.js"></script><script>const tezosNode = 'https://tezos-dev.cryptonomic-infra.tech:443';const conseilServer = {url: 'https://conseil-dev.cryptonomic-infra.tech:443',apiKey: '申请一个自己的账号吧',network: 'babylonnet'}const networkBlockTime = 30 + 1;let keyStore = {};const alphanetFaucetAccount = {"mnemonic": [ "promote", "grape", "sea", "glide", "still", "suggest", "vehicle", "front", "bulb", "wolf", "cart", "cart", "surround", "creek", "cycle" ],"secret": "b43d272885698df92e01a9adac18e697e9db42d0","amount": "24283188994","pkh": "tz1RArF4HTSMHpKywvvU1qtHRg89eWQN1CLL","password": "LieZc5k2PT","email": "jwydlazq.dhugusjq@tezos.example.org"};const secretKey = 'edskS1hYczoFBSmyXZrLJEViq5ksFs1N2L7QKdTF1q3ZJiXvBwmsVtfeBdCXytM1Tzo645JKYjt6iyhqDwUyFMzZTwsq8Y9NHq';function clearRPCOperationGroupHash(hash) {return hash.replace(/\"/g, '').replace(/\n/, '');}async function initAccount() {//keyStore = await conseiljs.TezosWalletUtil.unlockFundraiserIdentity(alphanetFaucetAccount.mnemonic.join(' '), alphanetFaucetAccount.email, alphanetFaucetAccount.password, alphanetFaucetAccount.pkh);keyStore = await conseiljs.TezosWalletUtil.restoreIdentityWithSecretKey(secretKey);}async function invokeContract() {const augend = document.getElementById('augend').value;const addend = document.getElementById('addend').value;const contractAddress = 'KT1C8eB3d2VQnuj6ARRT8V4jRUhUuYeNcQK1';const params = `{"prim": "Pair", "args": [{"int": "${augend}"}, {"int": "${addend}"}]}`;const paramFormat = conseiljs.TezosParameterFormat.Micheline;let nodeResult = await conseiljs.TezosNodeWriter.sendContractInvocationOperation(tezosNode, keyStore, contractAddress, 0, 50000, '', 1000, 20000, undefined, params, paramFormat);const groupid = clearRPCOperationGroupHash(nodeResult.operationGroupID);console.log(`Injected activation operation with ${groupid}`);let conseilResult = await conseiljs.TezosConseilClient.awaitOperationConfirmation(conseilServer, conseilServer.network, groupid, 10, networkBlockTime);if (conseilResult.length == 1 && conseilResult[0]['status'] === 'applied') {console.log(conseilResult[0]);conseilResult = await conseiljs.TezosConseilClient.getAccount(conseilServer, conseilServer.network, contractAddress);console.log(conseilResult[0]);//document.getElementById('result').innerText = `= ${conseilResult[0]['storage']}`; //现在的conseiljs,getAccount只返回一个元素，而非数组了。document.getElementById('result').innerText = `= ${conseilResult['storage']}`;} else if (conseilResult.length == 1 && conseilResult[0]['status'] !== 'applied') {console.log(`operation ${groupid} failed`);document.getElementById('result').innerText = '= error';console.log(conseilResult[0]);nodeResult = await conseiljs.TezosNodeReader.getBlock(tezosNode, conseilResult[0]['block_hash']);console.log(nodeResult);} else {console.log(`operation ${groupid} appears to have been rejected`);}}async function run() {await initAccount();await invokeContract();}</script></head><body><form><input type="number" id="augend" value="1" /> + <input type="number" id="addend" value="1" /> <span id="result"></span><button onclick="run(); return false;">Run</button></form></body>
</html>
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