Go-ethereum compiler in windows 坑
go get -v -u -x github.com/ethereum/go-ethereum
Issue 坑
升级Golang 时覆盖文件问题导致编译报错
/usr/local/go/src/crypto/rc4/rc4_asm.go:15:18: (*Cipher).XORKeyStream redeclared in this block
previous declaration at /usr/local/go/src/crypto/rc4/rc4.go:61:6 # bytes
/usr/local/go/src/bytes/bytes_decl.go:10:6: IndexByte redeclared in this block
previous declaration at /usr/local/go/src/bytes/bytes.go:101:34
/usr/local/go/src/bytes/bytes_decl.go:17:6: Equal redeclared in this block
previous declaration at /usr/local/go/src/bytes/bytes.go:18:25
/usr/local/go/src/bytes/bytes_decl.go:24:6: Compare redeclared in this block
previous declaration at /usr/local/go/src/bytes/bytes.go:37:27
# crypto/cipher
/usr/local/go/src/crypto/cipher/xor_amd64.go:9:6: xorBytes redeclared in this block
previous declaration at /usr/local/go/src/crypto/cipher/xor.go:58:33
/usr/local/go/src/crypto/cipher/xor_amd64.go:22:6: xorWords redeclared in this block
previous declaration at /usr/local/go/src/crypto/cipher/xor.go:83:27
# strings
/usr/local/go/src/strings/strings_decl.go:8:6: IndexByte redeclared in this block
previous declaration at /usr/local/go/src/strings/strings.go:150:34
whereis go rm -rf [all golang] 重新安装
参见
go-eth Commands
- geth init ./genesis.json –datadir “./chain”
- 启用私链
- 创建账户
- 挖矿
初始化一个创世区块
初始化创世区块时，要先创建一个genesis.json文件，内容如下：
{
"config": {
"chainId": 10,
"homesteadBlock": 0,
"eip155Block": 0,
"eip158Block": 0
},
"coinbase" : "0x0000000000000000000000000000000000000000",
"difficulty" : "0x20000",
"extraData" : "",
"gasLimit" : "0xffffffff",
"nonce" : "0x0000000000000042",
"mixhash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
"parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
"timestamp" : "0x00",
"alloc" : {}
}
| 参数名称 | 参数描述 |
|---|---|
| mixhash | 与nonce配合用于挖矿，由上一个区块的一部分生成的hash。注意他和nonce的设置需要满足以太坊的Yellow paper, 4.3.4. Block Header Validity, (44)章节所描述的条件 |
| nonce | nonce就是一个64位随机数，用于挖矿，注意他和mixhash的设置需要满足以太坊的Yellow paper, 4.3.4. Block Header Validity, (44)章节所描述的条件 |
| difficulty | 设置当前区块的难度，如果难度过大，cpu挖矿就很难，这里设置较小难度 |
| alloc | 用来预置账号以及账号的以太币数量，因为私有链挖矿比较容易，所以我们不需要预置有币的账号，需要的时候自己创建即可以 |
| coinbase | 矿工的账号，随便填 |
| timestamp | 设置创世块的时间戳 |
| parentHash | 上一个区块的hash值，因为是创世块，所以这个值是0 |
| extraData | 附加信息，随便填，可以填你的个性信息 |
| gasLimit | 该值设置对GAS的消耗总量限制，用来限制区块能包含的交易信息总和，因为我们是私有链，所以填最大 |
创世区块的初始化
geth init ./genesis.json –datadir “./chain”
当前区块链网络数据存放的位置会保存在chain目录中
yuyangdeMacBook-Pro:~ yuyang$ mkdir TestGeth
yuyangdeMacBook-Pro:~ yuyang$ cd TestGeth
yuyangdeMacBook-Pro:TestGeth yuyang$ geth init ./genesis.json --datadir "./chain"
INFO [02-24|11:08:41] Maximum peer count ETH=25 LES=0 total=25
INFO [02-24|11:08:41] Allocated cache and file handles database=/Users/yuyang/TestGeth/chain/geth/chaindata cache=16 handles=16
INFO [02-24|11:08:41] Writing custom genesis block
INFO [02-24|11:08:41] Persisted trie from memory database nodes=0 size=0.00B time=10.106µs gcnodes=0 gcsize=0.00B gctime=0s livenodes=1 livesize=0.00B
INFO [02-24|11:08:41] Successfully wrote genesis state database=chaindata hash=5e1fc7…d790e0
INFO [02-24|11:08:41] Allocated cache and file handles database=/Users/yuyang/TestGeth/chain/geth/lightchaindata cache=16 handles=16
INFO [02-24|11:08:41] Writing custom genesis block
INFO [02-24|11:08:41] Persisted trie from memory database nodes=0 size=0.00B time=1.743µs gcnodes=0 gcsize=0.00B gctime=0s livenodes=1 livesize=0.00B
INFO [02-24|11:08:41] Successfully wrote genesis state database=lightchaindata hash=5e1fc7…d790e0
使用以下命令，启用私有链，并创建log日志文件
geth
–datadir “./chain”
–nodiscover
console 2»eth_output.log
| 参数名称 | 参数描述 |
| datadir | 设置当前区块链网络数据存放的位置 |
| console | 启动命令行模式，可以在Geth中执行命令 |
| nodiscover | 私有链地址，不会被网上看到 |
其他命令
web3.personal.newAccount(“password”) 创建帐户的方式有两种，第一种创建帐户时直接初始化密码 web3.eth.accounts 查看帐户 miner.start() 挖矿执行以下命令：挖矿会默认保存到创建的第一个帐户 miner.stop() 停止挖矿后，以太币则不会产生，同样智能合约、转帐等操作也不会起作用
余额查询
web3.eth.getBalance(“account id”)
每次记一长串的地址很麻烦，我们可以通过设置变量来acc0表示帐户1
acc0 = web3.eth.accounts[0]
