go-ethereum 的常用 console 命令

当我们搭建了一条以太坊的私有链后, 使用 geth console 命令可启动节点, 并进入一个交互式的控制台.

1
$ geth --datadir "./chain" --networkid 15 console

运行上面命令后, 将会得到像以下的输出:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
INFO [06-07|13:29:04] Maximum peer count ETH=25 LES=0 total=25
INFO [06-07|13:29:04] Starting peer-to-peer node instance=Geth/v1.8.10-stable/darwin-amd64/go1.10.2
INFO [06-07|13:29:04] Allocated cache and file handles database=/Users/Sai/opt/Ethereum/chain/geth/chaindata cache=768 handles=1024
... #中间省略
...
WARN [06-07|13:29:04] Blockchain not empty, fast sync disabled
INFO [06-07|13:29:04] Starting P2P networking
INFO [06-07|13:29:04] UDP listener up self=enode://0f28c8850e733dabbcc4845191c3013c5c73c7d338cc62fc79318111765fd49db48724b0874b0ab32cd259f32feaf6e794a7a036d99749766c867ada0589ea9f@192.168.1.18:30303
INFO [06-07|13:29:04] RLPx listener up self=enode://0f28c8850e733dabbcc4845191c3013c5c73c7d338cc62fc79318111765fd49db48724b0874b0ab32cd259f32feaf6e794a7a036d99749766c867ada0589ea9f@192.168.1.18:30303
INFO [06-07|13:29:04] IPC endpoint opened url=/Users/Sai/opt/Ethereum/chain/geth.ipc
Welcome to the Geth JavaScript console!
instance: Geth/v1.8.10-stable/darwin-amd64/go1.10.2
INFO [06-07|13:29:04] Mapped network port proto=udp extport=30303 intport=30303 interface=NAT-PMP(192.168.199.1)
INFO [06-07|13:29:04] Etherbase automatically configured address=0xD2b80AE509A46Af16B2dD7480C6b00e073133ad1
coinbase: 0xd2b80ae509a46af16b2dd7480c6b00e073133ad1
at block: 3735 (Wed, 06 Jun 2018 17:52:40 CST)
datadir: /Users/Sai/opt/Ethereum/chain
modules: admin:1.0 debug:1.0 eth:1.0 miner:1.0 net:1.0 personal:1.0 rpc:1.0 txpool:1.0 web3:1.0
> INFO [06-07|13:29:04] Mapped network port proto=tcp extport=30303 intport=30303 interface=NAT-PMP(192.168.199.1)
>

这是一个交互式的 Javascript 执行环境, 可以直接在 > 提示符后输入 Javascript 代码, 它会将执行后的结果在当前窗口中输出.
不过很可能一些 console 的日志或辅助信息也会在当前窗口中输出, 影响 Javascript 代码结果的查看. 所以一个更好的启动 geth console 方式, 是使用以下的命令, 将 console 的输出重定向到一个文件中:

1
$ geth --datadir "./chain" --networkid 15 console 2> console.log

运行上面的命令后, 我们将进入一个更清爽的交互式环境:

1
2
3
4
5
6
7
8
9
Welcome to the Geth JavaScript console!
instance: Geth/v1.8.10-stable/darwin-amd64/go1.10.2
coinbase: 0xd2b80ae509a46af16b2dd7480c6b00e073133ad1
at block: 3735 (Wed, 06 Jun 2018 17:52:40 CST)
datadir: /Users/Sai/opt/Ethereum/chain
modules: admin:1.0 debug:1.0 eth:1.0 miner:1.0 net:1.0 personal:1.0 rpc:1.0 txpool:1.0 web3:1.0
>

然后我们可以另起一个终端窗口, 使用命令 tail -f console.log 来查看 console 的日志或辅助信息输出.

在这个交互式的 Javascript 执行环境中, 内置了一些用来操作 Ethereum 节点网络的 Javascript 对象. 它们提供的功能很丰富, 比如: 查看区块与交易信息、创建账户、挖矿、发送交易、部署智能合约、管理节点、查看内存池状态等等. 在进入 Javascript 的执行环境后, 我们可以直接使用这些对象.

内置对象列表:

对象 用处
personal 包含与账户管理相关的方法
admin 包含与节点节点相关的方法
miner 包含启动或停止挖矿的方法
eth 包含与操作区块链相关的方法
net 包含一些查看P2P网络状态的方法
txpool 包含一些查看交易内存池的方法
web3 包含了以上的对象, 还包含一些有关单位换算的工具类方法

下面将介绍这些内置对象常用方法的使用. 前面带 > 字符的表示输入的 Javascript 命令代码, 其它的表示输出.


1. 账户管理

1.1 查看账户

先查看一下当前节点的账户信息:

1
2
> personal.listAccounts
[]

或者使用以下命令查看:

1
2
> eth.accounts
[]

1.2 创建账户

此时节点网络中没有任何的账户, 我们可以使用 personal 对象来创建账户:

1
2
3
4
> personal.newAccount()
Passphrase:
Repeat passphrase:
"0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593"

也可以在创建账户时, 指定密码:

1
2
> personal.newAccount("123456")
"0xe74fc1abfbac8f598a979b11f23177f69f4de6de"

我们再次查看账户:

1
2
> personal.listAccounts
["0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593", "0xe74fc1abfbac8f598a979b11f23177f69f4de6de"]

查看指定账户:

1
2
> personal.listAccounts[0]
"0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593"

1.3 解锁账户

1
2
3
4
> personal.unlockAccount(eth.accounts[0])
Unlock account 0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593
Passphrase:
true

当进行发送交易时, 需要先对转出的账户进行解锁操作.

可以指定过期时间, 单位为秒(以下为设置5分钟后解锁过期):

1
2
> personal.unlockAccount(eth.accounts[1], "123456", 60*5)
true

假如我们想在指定过期时间时, 依然在密码提示符后输入密码, 而不是直接在代码命令中输入密码明文, 可以在密码参数一项传入 null:

1
2
3
4
> personal.unlockAccount(eth.accounts[1], null, 60*5)
Unlock account 0xe74fc1abfbac8f598a979b11f23177f69f4de6de
Passphrase:
true

1.4 查看钱包的所有账户信息

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
> personal.listWallets
[{
accounts: [{
address: "0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593",
url: "keystore:///Users/Sai/opt/Ethereum/chain/keystore/UTC--2018-06-07T06-24-49.837760495Z--4378f11e3d4a1e26381cfd285f3237d4b7fc5593"
}],
status: "Unlocked",
url: "keystore:///Users/Sai/opt/Ethereum/chain/keystore/UTC--2018-06-07T06-24-49.837760495Z--4378f11e3d4a1e26381cfd285f3237d4b7fc5593"
}, {
accounts: [{
address: "0xe74fc1abfbac8f598a979b11f23177f69f4de6de",
url: "keystore:///Users/Sai/opt/Ethereum/chain/keystore/UTC--2018-06-07T06-27-20.273464191Z--e74fc1abfbac8f598a979b11f23177f69f4de6de"
}],
status: "Locked",
url: "keystore:///Users/Sai/opt/Ethereum/chain/keystore/UTC--2018-06-07T06-27-20.273464191Z--e74fc1abfbac8f598a979b11f23177f69f4de6de"
}]


2. admin 管理

2.1 查看数据目录

1
2
> admin.datadir
"/Users/Sai/opt/Ethereum/chain"

2.2 显示当前节点信息

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
> admin.nodeInfo
{
enode: "enode://a14d711a9cd37c00c10807edda1a0ad5f7076125132319cbc8ce1a37cfadb4db22028be6b8103bea208ceb114e4ed81fbd5f3fa927561a90b9f52b725ef4fa0e@192.168.1.18:30303",
id: "a14d711a9cd37c00c10807edda1a0ad5f7076125132319cbc8ce1a37cfadb4db22028be6b8103bea208ceb114e4ed81fbd5f3fa927561a90b9f52b725ef4fa0e",
ip: "192.168.1.18",
listenAddr: "[::]:30303",
name: "Geth/v1.8.10-stable/darwin-amd64/go1.10.2",
ports: {
discovery: 30303,
listener: 30303
},
protocols: {
eth: {
config: {
chainId: 15,
eip150Hash: "0x0000000000000000000000000000000000000000000000000000000000000000",
eip155Block: 0,
eip158Block: 0,
homesteadBlock: 0
},
difficulty: 1024,
genesis: "0x2720038ef46044a7a895296b85745294340ecfcedc32f8c9e9802129aeb62890",
head: "0x2720038ef46044a7a895296b85745294340ecfcedc32f8c9e9802129aeb62890",
network: 15
}
}
}

2.3 查看当前节点地址

1
2
> admin.nodeInfo.enode
"enode://a14d711a9cd37c00c10807edda1a0ad5f7076125132319cbc8ce1a37cfadb4db22028be6b8103bea208ceb114e4ed81fbd5f3fa927561a90b9f52b725ef4fa0e@192.168.1.18:30303"

其中的 192.168.1.18 表示 ipv4 地址, 也可能为 “[::]”, 表示 ipv6 地址.

2.4 查看 networkid

1
2
> admin.nodeInfo.protocols.eth.network
15

2.5 添加其它节点

可以通过 admin.addPeer("节点地址") 方法连接到其它节点. 两个节点要想联通, 必须保证网络是相通的, 并且要指定相同的 networkid. 而且启动节点时, 注意去掉 –nodiscover 参数.

先确保网络可用:

1
2
> net.listening
true

添加其它节点:

1
> admin.addPeer("enode://87c10977acb3f48718e3a980a27f39e9c7a0bf00143f2b9143a22fa96e33e6b519d7e8407a32f5a61f9c6eb139d6bd46ad7f7288f169d0d0689e881d76e997c1@192.168.1.18:30301")

其中的节点地址, 是使用以下命令另外启动的一个节点:
geth --datadir "./chain2" --networkid 15 --port 30301 console 2> console2.log

2.6 查看其它Peer节点信息

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
> admin.peers
[{
caps: ["eth/63"],
id: "87c10977acb3f48718e3a980a27f39e9c7a0bf00143f2b9143a22fa96e33e6b519d7e8407a32f5a61f9c6eb139d6bd46ad7f7288f169d0d0689e881d76e997c1",
name: "Geth/v1.8.10-stable/darwin-amd64/go1.10.2",
network: {
inbound: false,
localAddress: "192.168.199.141:62161",
remoteAddress: "192.168.1.18:30301",
static: true,
trusted: false
},
protocols: {
eth: {
difficulty: 1024,
head: "0x2720038ef46044a7a895296b85745294340ecfcedc32f8c9e9802129aeb62890",
version: 63
}
}
}]

列表其它节点的 IP 地址:

1
2
3
> admin.peers.forEach(function(p) {console.log(p.network.remoteAddress)})
192.168.1.18:30301
undefined


3. miner 挖矿管理

3.1 开始挖矿

1
2
> miner.start(2)
null

其中的参数表示挖矿时使用的线程数, 会根据计算机的硬件情况进行设置.
第一次启动挖矿时, 会先生成挖矿所需的 DAG 文件, 这个过程可能会比较慢, 等进度达到 100% 后, 就会开始挖矿.

3.2 停止挖矿

1
2
> miner.stop()
true

3.3 设置矿工账户

当挖到一个区块得到以太币奖励时, 所得的奖励会进入到矿工的账户中.
这个账户叫做 coinbase, 默认下矿工的账户为系统的第一个账户.
我们也可以设置其它的账户为 coinbase 账户 :

1
2
> miner.setEtherbase(eth.accounts[1])
true


4. eth 管理

4.1 查看矿工账户

1
2
> eth.coinbase
"0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593"

默认下 coinbase 为系统的第一个账户.

4.2 查看账号列表

1
2
> eth.accounts
["0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593", "0xe74fc1abfbac8f598a979b11f23177f69f4de6de"]

查看指定的账户:

1
2
> eth.accounts[0]
"0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593"

4.3 查看账户余额

1
2
> eth.getBalance(eth.accounts[0])
890000000000000000000

getBalance 方法返回值的单位是 wei, wei是以太币的最小单位.
其中: 1以太币=10^18个wei.
可以使用 web3.fromWei() 方法将返回值换算成以太币:

1
2
3
4
> u0 = eth.accounts[0]
"0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593"
> web3.fromWei(eth.getBalance(u0), 'ether')
890

4.4 一次查看所有的账户余额

1
2
3
4
5
6
7
8
9
10
11
12
13
14
> function checkAllBalances() {
... web3.eth.getAccounts(function(err, accounts) {
......... accounts.forEach(function(id) {
............... web3.eth.getBalance(id, function(err, balance) {
..................... console.log("" + id + ":\tbalance: " + web3.fromWei(balance, "ether") + " ether");
..................... });
............... });
......... });
... };
undefined
> checkAllBalances()
0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593: balance: 890 ether
0xe74fc1abfbac8f598a979b11f23177f69f4de6de: balance: 0 ether
undefined

4.5 发送交易

发送交易时, 需要先对发起交易的账户进行 解锁:

1
2
3
4
> personal.unlockAccount(eth.accounts[0])
Unlock account 0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593
Passphrase:
true

这里从 账户0 转10个以太币到 账户1 中:

1
2
3
4
> amount = web3.toWei(10, 'ether')
"10000000000000000000"
> eth.sendTransaction({from: eth.accounts[0], to: eth.accounts[1], value: amount})
"0xdc6e22cf55db26a14486375e278712af8a19667f4541a8cca3d7ad67fcb5fad7"

我们去查看所有账户中的余额:

1
2
3
4
> checkAllBalances()
0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593: balance: 890 ether
0xe74fc1abfbac8f598a979b11f23177f69f4de6de: balance: 0 ether
undefined

发现还没转过来, 因为此时交易虽然已经提交到网络中, 但还未被处理.
我们需要启动挖矿, 然后等一会挖到区块后, 才能够查看到交易完成后的信息:

1
2
3
4
5
6
7
> miner.start(2)
null
> miner.stop()
true
> checkAllBalances()
0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593: balance: 905 ether
0xe74fc1abfbac8f598a979b11f23177f69f4de6de: balance: 10 ether

注意: 这里的账户0中的余额变多了, 因为挖矿一段时间后, 会有新的以太币产生.

4.6 查看挂起的交易

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
> eth.pendingTransactions
[{
blockHash: null,
blockNumber: null,
from: "0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593",
gas: 90000,
gasPrice: 18000000000,
hash: "0xdc6e22cf55db26a14486375e278712af8a19667f4541a8cca3d7ad67fcb5fad7",
input: "0x",
nonce: 0,
r: "0x74796e42c71cf051c3a078e56524ff2e4c26ebdef240c4f79a08efc931e1dcbd",
s: "0x355af7b6a46d059cc53f73c878eadd59e0cede1131a7faa78e67e70913470c04",
to: "0xe74fc1abfbac8f598a979b11f23177f69f4de6de",
transactionIndex: 0,
v: "0x42",
value: 10000000000000000000
}]

如果返回值为空, 表示交易已全部完成:

1
2
> eth.pendingTransactions
[]

4.7 查看区块信息

查看当前区块总数:

1
2
> eth.blockNumber
183

查看某个区块信息:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
> eth.getBlock(0)
{
difficulty: 1024,
extraData: "0x",
gasLimit: 4294967295,
gasUsed: 0,
hash: "0x2720038ef46044a7a895296b85745294340ecfcedc32f8c9e9802129aeb62890",
logsBloom: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
miner: "0x0000000000000000000000000000000000000000",
mixHash: "0x0000000000000000000000000000000000000000000000000000000000000000",
nonce: "0x0000000000000042",
number: 0,
parentHash: "0x0000000000000000000000000000000000000000000000000000000000000000",
receiptsRoot: "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
sha3Uncles: "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
size: 507,
stateRoot: "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
timestamp: 0,
totalDifficulty: 1024,
transactions: [],
transactionsRoot: "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
uncles: []
}
> eth.getBlock(1)
{
difficulty: 131072,
extraData: "0xd98301080a846765746888676f312e31302e328664617277696e",
gasLimit: 4290772993,
gasUsed: 0,
hash: "0x0dec1b5cb7304eea1bdd1d2d5ee73da53447ef54a4283557cea84025080d6d09",
logsBloom: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
miner: "0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593",
mixHash: "0xf5ccd28f1816ecb5d3315811eca6273f913a86c4b1862174ce03fbb8c7f27a6b",
nonce: "0x1d781ecfc8e4b9cb",
number: 1,
parentHash: "0x2720038ef46044a7a895296b85745294340ecfcedc32f8c9e9802129aeb62890",
receiptsRoot: "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
sha3Uncles: "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
size: 538,
stateRoot: "0xf336d1c5cab05b1015a033c502a47e02b7cacb41f055363fc7d59f8db2cb9a47",
timestamp: 1528358068,
totalDifficulty: 132096,
transactions: [],
transactionsRoot: "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
uncles: []
}
> eth.getBlock(1000)
null

getBlock 方法传入的是区块的序号数, 从0开始计数. 当区块不存在时, 将返回 null.

4.8 查看交易信息

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
> eth.getTransaction("0xdc6e22cf55db26a14486375e278712af8a19667f4541a8cca3d7ad67fcb5fad7")
{
blockHash: "0x6dbf24bcecaad828ca1028209918fdeaa0eb54199a49f5d949823da3d8661fa8",
blockNumber: 179,
from: "0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593",
gas: 90000,
gasPrice: 18000000000,
hash: "0xdc6e22cf55db26a14486375e278712af8a19667f4541a8cca3d7ad67fcb5fad7",
input: "0x",
nonce: 0,
r: "0x74796e42c71cf051c3a078e56524ff2e4c26ebdef240c4f79a08efc931e1dcbd",
s: "0x355af7b6a46d059cc53f73c878eadd59e0cede1131a7faa78e67e70913470c04",
to: "0xe74fc1abfbac8f598a979b11f23177f69f4de6de",
transactionIndex: 0,
v: "0x42",
value: 10000000000000000000
}
> eth.getTransaction("0xdc6e22cf55db26a14486375e278712af8a19667f4541a8cca3d7ad0000000000")
null

getTransaction 方法传入的是交易的Hash值. 当交易不存在时, 将返回 null.

4.9 查看支持的智能合约编译器

1
2
3
4
5
6
> eth.compile
{
lll: function(),
serpent: function(),
solidity: function()
}


5. net 管理

5.1 查看网络监听状态

1
2
> net.listening
true

5.2 查看网络的Peer节点数

1
2
> net.peerCount
1

5.3 查看网络的id

1
2
> net.version
"15"

这里有个疑问: version 字面上返回的是 networkid 的值, 而不是什么版本值?
很可能节点网络的版本用的就是 networkid 的值


6. txpool 管理

6.1 查看交易内存池状态

1
2
3
4
5
> txpool.status
{
pending: 1,
queued: 0
}

6.2 查看交易内存池的内容

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
> txpool.content
{
pending: {
0x4378f11e3D4a1E26381CfD285f3237D4B7fc5593: {
1: {
blockHash: "0x0000000000000000000000000000000000000000000000000000000000000000",
blockNumber: null,
from: "0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593",
gas: "0x15f90",
gasPrice: "0x430e23400",
hash: "0x67738610c99674396e9474b099fce96de3d14df706fc966659b511fb1834195a",
input: "0x",
nonce: "0x1",
r: "0xb8dbd2a8f28a3109f23150450df7c7811e564ddd428c49af55b405ce4c28e2ab",
s: "0x59c2df6027bdfdc21ffe641f5e498c34089ae45f5daab323f34a02e3e2f67b5a",
to: "0xe74fc1abfbac8f598a979b11f23177f69f4de6de",
transactionIndex: "0x0",
v: "0x41",
value: "0x1158e460913d00000"
}
}
},
queued: {}
}


7. web3 工具方法

在介绍 web3 对象中的工具方法前, 先要对 Ether 币的单位进行说明.
Ether 币的最小单位为 wei, 也是命令行中默认的单位. 然后每1000个 wei 进一个单位, 依次为:

  • kwei (1000 wei)
  • mwei (1000 kwei)
  • gwei (1000 mwei)
  • szabo (1000 gwei)
  • finney (1000 szabo)
  • ether (1000 finney)

也即: 1 ether = 10^18 wei

7.1 其它单位转换为 wei

1
2
3
4
5
6
7
8
9
10
> web3.toWei(1, 'ether')
"1000000000000000000"
> web3.toWei(1, 'kwei')
"1000"
> web3.toWei(1, 'szabo')
"1000000000000"
> web3.toWei(10)
"10000000000000000000"
> web3.toWei(10, null)
"10000000000000000000"

toWei 方法的第二个参数不传或者为 null 时, 默认将按 ether 单位进行转换为 wei.

7.2 wei 转换为其它单位

1
2
3
4
5
6
7
8
9
10
> web3.fromWei(1000000000000000000, 'ether')
"1"
> web3.fromWei(1000, 'kwei')
"1"
> web3.fromWei(1000000000000, 'szabo')
"1"
> web3.fromWei(10000000000000000000)
"10"
> web3.fromWei(10000000000000000000, null)
"10"

fromWei 方法的第二个参数不传或者为 null 时, 默认将转换为单位 ether.

7.3 判断是否为地址

1
2
3
4
5
6
7
8
9
10
11
12
> eth.accounts[0]
"0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593"
> web3.isAddress("0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593")
true
> web3.isAddress(0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593)
false
> web3.isAddress("0x4378f11e3d4a1e26381cfd285f3237d4b7fc5593000000")
false
> web3.isAddress()
false
> web3.isAddress(12345678)
false

当传入的是一个160位长的字符串数字时, 才返回 true. 否则返回 false.