1

server/web3service/controllers/erc20.js

@@ -1,32 +1,24 @@
 const app = require('j7/app');
 const utils = require('j7/utils');
 const Web3 = require('web3');
-
-let erc20abi = null;
-
-async function getErc20Abil() {
-  if (erc20abi) {
-    const json = utils.readJsonFromFile(jsonUrl);
-    erc20abi = json.abi;
-  }
-  return erc20abi;
-}
+const metaFactory = require('../metadata/factory');
 
 async function getBalance(session) {
   const tokenContractAddress = session.request('token_address'); // ERC20代币合约地址
   const accountAddress = session.request('account_address'); // 用户地址
   const rpcUrl = session.request('rpc_url');
 
-  const tokenContract = new web3.eth.Contract(await getErc20Abil(), tokenContractAddress);
   const web3 = new Web3(rpcUrl);
+  const tokenContract = new web3.eth.Contract(metaFactory.getErc20Abil(), tokenContractAddress);
 
-  tokenContract.methods.balanceOf(accountAddress).call((error, balance) => {
-    if (error) {
-      console.error('获取余额时出错:', error);
+  tokenContract.methods.balanceOf(accountAddress).call((err, balance) => {
+    if (err) {
+      session.rspErr(1, err);
       return;
     }
-    console.log('余额:', balance);
-    session.rspOk();
+    session.rspData({
+      'balance': balance
+    });
   });
 }
 

server/web3service/metadata/factory.js

@@ -6,6 +6,7 @@ const metaClassList = [];
 const metaClasses = {};
 let web3ServiceConf = null;
 let configDir = './config/';
+let erc20abi = null;
 
 function registerMetaClass(fileName, primKey, wrapClass) {
   const metaClass = {
@@ -100,6 +101,9 @@ async function init() {
                     '',
                     'Web3Service'
                    );
+  {
+     erc20abi = utils.readJsonFromFile(configDir + 'erc20abi.json');
+  }
   load();
 }
 
@@ -137,6 +141,12 @@ function getWeb3ServiceConf() {
   return web3ServiceConf;
 }
 
+function getErc20Abil() {
+  if (erc20abi) {
+  }
+  return erc20abi.abi;
+}
+
 exports.init = init;
 
 exports.getMetaByKey = getMetaByKey;
@@ -144,3 +154,4 @@ exports.traverseMetaList = traverseMetaList;
 exports.callMetaStatic = callMetaStatic;
 
 exports.getWeb3ServiceConf = getWeb3ServiceConf;
+exports.getErc20Abil = getErc20Abil;