赞
踩
cnpm install web3@0.20.1 --save-dev
cnpm list web3
- if(typedef web3 !== 'undefined'){
- web3 == new Web3(web3.currentProvider);
- }else{
- web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"));
- }
- web3.eth.getBlock(48,function(error,result)){
- if(!error)
- console.log(JSON.stringify(result));
- else
- console.error(error);
- }
- [
- {
- "constant":true,
- "inputs":[
- {
- "name":"",
- "type":"address"
- }
- ],
- "name":"balances",
- "outputs":[
- {
- "name":"",
- "type":"uint256"
- }
- ],
- "payable":false,
- "stateMutability":"view",
- "type":"function"
- },
- {
- "constant":true,
- "inputs":[
-
- ],
- "name":"miner",
- "outputs":[
- {
- "name":"",
- "type":"address"
- }
- ],
- "payable":false,
- "stateMutability":"view",
- "type":"function"
- },
- {
- "constant":false,
- "inputs":[
- {
- "name":"receiver",
- "type":"address"
- },
- {
- "name":"amount",
- "type":"uint256"
- }
- ],
- "name":"mint",
- "outputs":[
-
- ],
- "payable":false,
- "stateMutability":"nonpayable",
- "type":"function"
- },
- {
- "constant":false,
- "inputs":[
- {
- "name":"receiver",
- "type":"address"
- },
- {
- "name":"amount",
- "type":"uint256"
- }
- ],
- "name":"send",
- "outputs":[
-
- ],
- "payable":false,
- "stateMutability":"nonpayable",
- "type":"function"
- },
- {
- "inputs":[
-
- ],
- "payable":false,
- "stateMutability":"nonpayable",
- "type":"constructor"
- },
- {
- "anonymous":false,
- "inputs":[
- {
- "indexed":false,
- "name":"from",
- "type":"address"
- },
- {
- "indexed":false,
- "name":"to",
- "type":"address"
- },
- {
- "indexed":false,
- "name":"amount",
- "type":"uint256"
- }
- ],
- "name":"Sent",
- "type":"event"
- }
- ]
- var BigNumber = require('bignumber.js')
- var balance = new BigNumber('1231231231123325647673565363777373733833222');
- balance.plus(21).tostring(10);//或者直接输入balance就可以,tostring(位数)转化进制
-
- //s表示正负数,1表示正数,-1表示负数
- //e表示科学技法中的10的位数
- //c数组,每14位切割一次定义成数组
Copyright © 2003-2013 www.wpsshop.cn 版权所有,并保留所有权利。