区块链学习（四）truffle部署编译智能合约以太坊私有链
前面我们介绍了以太坊私有链的搭建以及多节点私有链网络，这次我们介绍如何使用truffle框架来部署编译智能合约到我们之前搭建的私有链网络中。
搭建环境及需使用的工具：ubuntu18.04 Truffle v5.0.18 geth 1.8.27 Node v10.16.0
solc 0.5.8+commit.23d335f2.Linux.g++
在我们部署一个简单的合约之前，我们先介绍一些相关的知识。
一、geth 启动节点参数介绍
geth 当中有许多指令，因为之后私有链节点启动需要设置一些参数，我们重点介绍这些：
| 参数 | 参数详解 |
| datadir | 指明当前区块链私钥和网络数据存放的位置 |
| rpc | 开启http-rpc服务，可以进行智能合约的部署和调试 |
| rpcaddr | 指定http-rpc服务监听地址，默认为"localhost" |
| rpcport | 指定http-rpc服务监听端口，默认为8545 |
| rpccorsdomain | 表示任何链接都可以连接到此节点 |
| rpcapi | 设置允许连接的rpc的客户端，一般为db,eth,net,web3 |
| nodiscover | 关闭自动连接节点，但是可以手动添加节点，在搭建私有链的时候，为避免其他节点连入私有链，可以使用该命令 |
| maxpeers | 设置允许最大连节点数，默认25 |
| networkid | 指定以太坊网络id，共有链为1，测试链为3，默认启动1 |
| port | 指定以太坊网络监听端口，默认为30303 |
| mine | 开启挖矿，默认为cpu挖矿 |
| minerthreads | 挖矿占用cpu线程数，默认为4,现命名为miner.threads |
| etherbase | 指定矿工账号 |
| console | 启动命令行模式，可以在geth中执行命令 |
我们可以在终端输入geth -v来查看geth的全部指令
1 milo@milo-K46CB:~$ geth -v 2 Incorrect Usage. flag provided but not defined: -v 3 4 NAME: 5 geth - the go-ethereum command line interface 6 7 Copyright 2013-2018 The go-ethereum Authors 8 9 USAGE: 10 geth [options] command [command options] [arguments...] 11 12 VERSION: 13 1.8.27-stable-4bcc0a37 14 15 COMMANDS: 16 account Manage accounts 17 attach Start an interactive JavaScript environment (connect to node) 18 bug opens a window to report a bug on the geth repo 19 console Start an interactive JavaScript environment 20 copydb Create a local chain from a target chaindata folder 21 dump Dump a specific block from storage 22 dumpconfig Show configuration values 23 export Export blockchain into file 24 export-preimages Export the preimage database into an RLP stream 25 import Import a blockchain file 26 import-preimages Import the preimage database from an RLP stream 27 init Bootstrap and initialize a new genesis block 28 js Execute the specified JavaScript files 29 license Display license information 30 makecache Generate ethash verification cache (for testing) 31 makedag Generate ethash mining DAG (for testing) 32 monitor Monitor and visualize node metrics 33 removedb Remove blockchain and state databases 34 version Print version numbers 35 wallet Manage Ethereum presale wallets 36 help, h Shows a list of commands or help for one command 37 38 ETHEREUM OPTIONS: 39 --config value TOML configuration file 40 --datadir "/home/milo/.ethereum" Data directory for the databases and keystore 41 --keystore Directory for the keystore (default = inside the datadir) 42 --nousb Disables monitoring for and managing USB hardware wallets 43 --networkid value Network identifier (integer, 1=Frontier, 2=Morden (disused), 3=Ropsten, 4=Rinkeby) (default: 1) 44 --testnet Ropsten network: pre-configured proof-of-work test network 45 --rinkeby Rinkeby network: pre-configured proof-of-authority test network 46 --goerli Görli network: pre-configured proof-of-authority test network 47 --syncmode "fast" Blockchain sync mode ("fast", "full", or "light") 48 --gcmode value Blockchain garbage collection mode ("full", "archive") (default: "full") 49 --ethstats value Reporting URL of a ethstats service (nodename:secret@host:port) 50 --identity value Custom node name 51 --lightserv value Maximum percentage of time allowed for serving LES requests (0-90) (default: 0) 52 --lightpeers value Maximum number of LES client peers (default: 100) 53 --lightkdf Reduce key-derivation RAM & CPU usage at some expense of KDF strength 54 --whitelist value Comma separated block number-to-hash mappings to enforce (<number>=<hash>) 55 56 DEVELOPER CHAIN OPTIONS: 57 --dev Ephemeral proof-of-authority network with a pre-funded developer account, mining enabled 58 --dev.period value Block period to use in developer mode (0 = mine only if transaction pending) (default: 0) 59 60 ETHASH OPTIONS: 61 --ethash.cachedir Directory to store the ethash verification caches (default = inside the datadir) 62 --ethash.cachesinmem value Number of recent ethash caches to keep in memory (16MB each) (default: 2) 63 --ethash.cachesondisk value Number of recent ethash caches to keep on disk (16MB each) (default: 3) 64 --ethash.dagdir "/home/milo/.ethash" Directory to store the ethash mining DAGs (default = inside home folder) 65 --ethash.dagsinmem value Number of recent ethash mining DAGs to keep in memory (1+GB each) (default: 1) 66 --ethash.dagsondisk value Number of recent ethash mining DAGs to keep on disk (1+GB each) (default: 2) 67 68 TRANSACTION POOL OPTIONS: 69 --txpool.locals value Comma separated accounts to treat as locals (no flush, priority inclusion) 70 --txpool.nolocals Disables price exemptions for locally submitted transactions 71 --txpool.journal value Disk journal for local transaction to survive node restarts (default: "transactions.rlp") 72 --txpool.rejournal value Time interval to regenerate the local transaction journal (default: 1h0m0s) 73 --txpool.pricelimit value Minimum gas price limit to enforce for acceptance into the pool (default: 1) 74 --txpool.pricebump value Price bump percentage to replace an already existing transaction (default: 10) 75 --txpool.accountslots value Minimum number of executable transaction slots guaranteed per account (default: 16) 76 --txpool.globalslots value Maximum number of executable transaction slots for all accounts (default: 4096) 77 --txpool.accountqueue value Maximum number of non-executable transaction slots permitted per account (default: 64) 78 --txpool.globalqueue value Maximum number of non-executable transaction slots for all accounts (default: 1024) 79 --txpool.lifetime value Maximum amount of time non-executable transaction are queued (default: 3h0m0s) 80 81 PERFORMANCE TUNING OPTIONS: 82 --cache value Megabytes of memory allocated to internal caching (default: 1024) 83 --cache.database value Percentage of cache memory allowance to use for database io (default: 50) 84 --cache.trie value Percentage of cache memory allowance to use for trie caching (default: 25) 85 --cache.gc value Percentage of cache memory allowance to use for trie pruning (default: 25) 86 --trie-cache-gens value Number of trie node generations to keep in memory (default: 120) 87 88 ACCOUNT OPTIONS: 89 --unlock value Comma separated list of accounts to unlock 90 --password value Password file to use for non-interactive password input 91 92 API AND CONSOLE OPTIONS: 93 --rpc Enable the HTTP-RPC server 94 --rpcaddr value HTTP-RPC server listening interface (default: "localhost") 95 --rpcport value HTTP-RPC server listening port (default: 8545) 96 --rpcapi value API's offered over the HTTP-RPC interface 97 --rpc.gascap value Sets a cap on gas that can be used in eth_call/estimateGas (default: 0) 98 --ws Enable the WS-RPC server 99 --wsaddr value WS-RPC server listening interface (default: "localhost") 100 --wsport value WS-RPC server listening port (default: 8546) 101 --wsapi value API's offered over the WS-RPC interface 102 --wsorigins value Origins from which to accept websockets requests 103 --ipcdisable Disable the IPC-RPC server 104 --ipcpath Filename for IPC socket/pipe within the datadir (explicit paths escape it) 105 --rpccorsdomain value Comma separated list of domains from which to accept cross origin requests (browser enforced) 106 --rpcvhosts value Comma separated list of virtual hostnames from which to accept requests (server enforced). Accepts '*' wildcard. (default: "localhost") 107 --jspath loadScript JavaScript root path for loadScript (default: ".") 108 --exec value Execute JavaScript statement 109 --preload value Comma separated list of JavaScript files to preload into the console 110 111 NETWORKING OPTIONS: 112 --bootnodes value Comma separated enode URLs for P2P discovery bootstrap (set v4+v5 instead for light servers) 113 --bootnodesv4 value Comma separated enode URLs for P2P v4 discovery bootstrap (light server, full nodes) 114 --bootnodesv5 value Comma separated enode URLs for P2P v5 discovery bootstrap (light server, light nodes) 115 --port value Network listening port (default: 30303) 116 --maxpeers value Maximum number of network peers (network disabled if set to 0) (default: 25) 117 --maxpendpeers value Maximum number of pending connection attempts (defaults used if set to 0) (default: 0) 118 --nat value NAT port mapping mechanism (any|none|upnp|pmp|extip:<IP>) (default: "any") 119 --nodiscover Disables the peer discovery mechanism (manual peer addition) 120 --v5disc Enables the experimental RLPx V5 (Topic Discovery) mechanism 121 --netrestrict value Restricts network communication to the given IP networks (CIDR masks) 122 --nodekey value P2P node key file 123 --nodekeyhex value P2P node key as hex (for testing) 124 125 MINER OPTIONS: 126 --mine Enable mining 127 --miner.threads value Number of CPU threads to use for mining (default: 0) 128 --miner.notify value Comma separated HTTP URL list to notify of new work packages 129 --miner.gasprice "1000000000" Minimum gas price for mining a transaction 130 --miner.gastarget value Target gas floor for mined blocks (default: 8000000) 131 --miner.gaslimit value Target gas ceiling for mined blocks (default: 8000000) 132 --miner.etherbase value Public address for block mining rewards (default = first account) (default: "0") 133 --miner.extradata value Block extra data set by the miner (default = client version) 134 --miner.recommit value Time interval to recreate the block being mined (default: 3s) 135 --miner.noverify Disable remote sealing verification 136 137 GAS PRICE ORACLE OPTIONS: 138 --gpoblocks value Number of recent blocks to check for gas prices (default: 20) 139 --gpopercentile value Suggested gas price is the given percentile of a set of recent transaction gas prices (default: 60) 140 141 VIRTUAL MACHINE OPTIONS: 142 --vmdebug Record information useful for VM and contract debugging 143 --vm.evm value External EVM configuration (default = built-in interpreter) 144 --vm.ewasm value External ewasm configuration (default = built-in interpreter) 145 146 LOGGING AND DEBUGGING OPTIONS: 147 --fakepow Disables proof-of-work verification 148 --nocompaction Disables db compaction after import 149 --verbosity value Logging verbosity: 0=silent, 1=error, 2=warn, 3=info, 4=debug, 5=detail (default: 3) 150 --vmodule value Per-module verbosity: comma-separated list of <pattern>=<level> (e.g. eth/*=5,p2p=4) 151 --backtrace value Request a stack trace at a specific logging statement (e.g. "block.go:271") 152 --debug Prepends log messages with call-site location (file and line number) 153 --pprof Enable the pprof HTTP server 154 --pprofaddr value pprof HTTP server listening interface (default: "127.0.0.1") 155 --pprofport value pprof HTTP server listening port (default: 6060) 156 --memprofilerate value Turn on memory profiling with the given rate (default: 524288) 157 --blockprofilerate value Turn on block profiling with the given rate (default: 0) 158 --cpuprofile value Write CPU profile to the given file 159 --trace value Write execution trace to the given file 160 161 METRICS AND STATS OPTIONS: 162 --metrics Enable metrics collection and reporting 163 --metrics.influxdb Enable metrics export/push to an external InfluxDB database 164 --metrics.influxdb.endpoint value InfluxDB API endpoint to report metrics to (default: "http://localhost:8086") 165 --metrics.influxdb.database value InfluxDB database name to push reported metrics to (default: "geth") 166 --metrics.influxdb.username value Username to authorize access to the database (default: "test") 167 --metrics.influxdb.password value Password to authorize access to the database (default: "test") 168 --metrics.influxdb.tags value Comma-separated InfluxDB tags (key/values) attached to all measurements (default: "host=localhost") 169 170 WHISPER (EXPERIMENTAL) OPTIONS: 171 --shh Enable Whisper 172 --shh.maxmessagesize value Max message size accepted (default: 1048576) 173 --shh.pow value Minimum POW accepted (default: 0.2) 174 --shh.restrict-light Restrict connection between two whisper light clients 175 176 DEPRECATED OPTIONS: 177 --minerthreads value Number of CPU threads to use for mining (deprecated, use --miner.threads) (default: 0) 178 --targetgaslimit value Target gas floor for mined blocks (deprecated, use --miner.gastarget) (default: 8000000) 179 --gasprice "1000000000" Minimum gas price for mining a transaction (deprecated, use --miner.gasprice) 180 --etherbase value Public address for block mining rewards (default = first account, deprecated, use --miner.etherbase) (default: "0") 181 --extradata value Block extra data set by the miner (default = client version, deprecated, use --miner.extradata) 182 183 MISC OPTIONS: 184 --override.constantinople value Manually specify constantinople fork-block, overriding the bundled setting (default: 0) 185 --help, -h show help 186 187 188 COPYRIGHT: 189 Copyright 2013-2018 The go-ethereum Authors
二、truffle框架介绍
终端输入truffle -v
1 milo@milo-K46CB:~$ truffle -v 2 Truffle v5.0.18 - a development framework for Ethereum 3 4 Usage: truffle <command> [options] 5 6 Commands: 7 build Execute build pipeline (if configuration present) 8 compile Compile contract source files 9 config Set user-level configuration options 10 console Run a console with contract abstractions and commands available 11 create Helper to create new contracts, migrations and tests 12 debug Interactively debug any transaction on the blockchain (experimental) 13 deploy (alias for migrate) 14 develop Open a console with a local development blockchain 15 exec Execute a JS module within this Truffle environment 16 help List all commands or provide information about a specific command 17 init Initialize new and empty Ethereum project 18 install Install a package from the Ethereum Package Registry 19 migrate Run migrations to deploy contracts 20 networks Show addresses for deployed contracts on each network 21 obtain Fetch and cache a specified compiler 22 opcode Print the compiled opcodes for a given contract 23 publish Publish a package to the Ethereum Package Registry 24 run Run a third-party command 25 test Run JavaScript and Solidity tests 26 unbox Download a Truffle Box, a pre-built Truffle project 27 version Show version number and exit 28 watch Watch filesystem for changes and rebuild the project automatically
truffle是一套以太坊的开发测试框架，使用solidity开发语言，类似于javascript
这里我们就不将truffle的安装了
下面进入主要内容
三、启动私有链节点
进入私有链文件夹打开一个终端，后面我们以终端1代指它，在终端1输入以下命令
1 milo@milo-K46CB:~/private-geth$ geth --rpc --rpccorsdomain "*" --datadir ./data/00 --port 61910 --rpcport 8545 --rpcapi "db,eth,net,web3" --networkid 100 console
需要注意的是我们这里的启动节点命令与之前我们搭建的节点启动命令略有不同，其中：
--rpc是开启http-rpc服务，可以进行智能合约的部署和调试
--rpccorsdomain "*"表示任何链接都可以连接到此节点
--port 指定以太坊网络监听端口，默认为30303，这里随意选一个就好
--rpcport是指定http-rpc服务监听端口，默认为8545，但也可以自己更改，这里我们就用8545
（敲黑板，这里有个重点，我们这里设置的rpcport要与之后truffle-config.js文件中的port相对应）
--rpcapi是设置允许连接的rpc的客户端，一般为db,eth,net,web3，貌似这里也可以不用加
四、truffle合约编译部署
1、首先我们创建一个项目文件夹truffle_Project，然后打开一个新的终端，之后我们我们用终端2代之它，在终端2输入以下命令创建文件夹并初始化truffle环境
1 milo@milo-K46CB:~$ mkdir truffleProject 2 milo@milo-K46CB:~$ cd truffleProject/ 3 milo@milo-K46CB:~/truffleProject$ truffle init
输出以下结果：
1 ✔ Preparing to download 2 ✔ Downloading 3 ✔ Cleaning up temporary files 4 ✔ Setting up box 5 6 Unbox successful. Sweet! 7 8 Commands: 9 10 Compile: truffle compile 11 Migrate: truffle migrate 12 Test contracts: truffle test
经过初始化后，我们创建的truffle_Project文件夹下会多出contracts,migrations,test三个文件夹和treffle_config.js文件
2、编写合约
进入到contracts文件夹中，我们建立一个简单的智能合约Test.sol，在端口2输入以下命令
1 milo@milo-K46CB:~/truffleProject$ cd contracts/ 2 milo@milo-K46CB:~/truffleProject/contracts$ vim Test.sol
输入以上命令出现以下结果：
输入以下内容到文件内，wq保存退出
pragma solidity ^0.5.0; contract Test { function multiply(uint a) pure public returns(uint d) { return a * 7; } }
3、修改配置
终端输入指令进入migrateions文件中，创建2_deploy_contracys.js文件，具体操作如下：
1 milo@milo-K46CB:~/truffleProgect$ cd migrations/ 2 milo@milo-K46CB:~/truffleProgect/migrations$ vim 2_deploy_contracys.js
输入以下内容：
1 var Test = artifacts.require("./Test.sol"); 2 3 module.exports = function(deployer) { 4 deployer.deploy(Test); 5 };
之后我们在回到trifflr_Project文件夹，修改truffle-config.js文件，如下
1 milo@milo-K46CB:~/truffleProgect$ vim truffle-config.js
1 networks: { 2 live: { 3 host: "localhost", //本地地址，因为是在本机上建立的节点 4 port: 8545, //Ethereum的rpc监听的端口号，默认是8545 5 network_id: 100 // 自定义网络号 6 }
此处的port要与启动节点参数rpcport相同
4、编译
输入以下指令进行合约编译
milo@milo-K46CB:~/truffleProject$ truffle compile
编译成功输出以下结果：
1 Compiling your contracts... 2 =========================== 3 > Compiling ./contracts/Test.sol 4 > Artifacts written to /home/milo/truffleProgect/build/contracts 5 > Compiled successfully using: 6 - solc: 0.5.0+commit.1d4f565a.Emscripten.clang
这个时候我们就准备将合约部署到区块链中了，之前我们已经在终端1开启了私有链节点，在部署前，我们最好先开始挖矿，因为有有可能挖出矿的时间太长超过部署时间导致部署失败，在终端1输入：
1 > miner.start(3) 2 INFO [06-30|14:41:52.571] Updated mining threads threads=3 3 INFO [06-30|14:41:52.571] Transaction pool price threshold updated price=1000000000 4 INFO [06-30|14:56:17.263] Commit new mining work number=57 sealhash=8af97d…82bbb5 uncles=0 txs=1 gas=284908 fees=0.00569816 elapsed=29.717ms
然后我们在到终端2输入以下命令开始部署：
1 milo@milo-K46CB:~/truffleProject$ truffle migrate --network live
此时终端1会出现：
1 INFO [06-30|14:56:15.134] Submitted contract creation
fullhash=0xf429d7cb5f31287af7328ad699c883ddabc346c03d778dbd3adc100de4d53967 contract=0x66C64c5dcacE473aD26497781df1E63d6Dd95688
输入部署命令后，当挖到一个矿时，成功时会出现以下结果：
1 Compiling your contracts... 2 =========================== 3 > Everything is up to date, there is nothing to compile. 4 5 6 Starting migrations... 7 ====================== 8 > Network name: 'live' 9 > Network id: 100 10 > Block gas limit: 0xf25e94c2 11 12 13 1_initial_migration.js 14 ====================== 15 16 Deploying 'Migrations' 17 ---------------------- 18 > transaction hash: 0xf429d7cb5f31287af7328ad699c883ddabc346c03d778dbd3adc100de4d53967 19 > Blocks: 1 Seconds: 554 20 > contract address: 0x66C64c5dcacE473aD26497781df1E63d6Dd95688 21 > block number: 57 22 > block timestamp: 1561877762 23 > account: 0x8830397771710ADE101f0080f0da076181Bad374 24 > balance: 284 25 > gas used: 284908 26 > gas price: 20 gwei 27 > value sent: 0 ETH 28 > total cost: 0.00569816 ETH 29 30 31 ⠦ Saving migration to chain.
需要注意的是这个时候我们需要继续挖矿才能往下进行，只有挖到新的区块才能将合约部署到区块中
终端1：
1 INFO [06-30|14:56:17.263] Commit new mining work number=57 sealhash=8af97d…82bbb5 uncles=0 txs=1 gas=284908 fees=0.00569816 elapsed=29.717ms 2 INFO [06-30|15:05:26.447] Successfully sealed new block number=57 sealhash=8af97d…82bbb5 hash=f75699…3cd3f8 elapsed=9m9.184s 3 INFO [06-30|15:05:26.645] 🔗 block reached canonical chain number=50 hash=e1bd78…66cb22 4 INFO [06-30|15:05:26.659] 🔨 mined potential block number=57 hash=f75699…3cd3f8 5 6 INFO [06-30|15:35:36.018] Commit new mining work number=60 sealhash=2c8cb8…6beaab uncles=0 txs=1 gas=106241 fees=0.00212482 elapsed=24.778ms 7 INFO [06-30|15:35:36.198] Successfully sealed new block number=60 sealhash=2c8cb8…6beaab hash=fc8f2e…c7e0ad elapsed=180.515ms 8 INFO [06-30|15:35:36.198] 🔗 block reached canonical chain number=53 hash=88967f…8f12f8 9 INFO [06-30|15:35:36.198] 🔨 mined potential block number=60 hash=fc8f2e…c7e0ad 10 INFO [06-30|15:35:36.199] Commit new mining work number=61 sealhash=4ab3e8…675cc8 uncles=0 txs=0 gas=0 fees=0 elapsed=267.307µs 11 INFO [06-30|15:35:36.487] Successfully sealed new block number=61 sealhash=4ab3e8…675cc8 hash=fe871e…560170 elapsed=288.572ms 12 INFO [06-30|15:35:36.487] 🔗 block reached canonical chain number=54 hash=c19457…22223c 13 INFO [06-30|15:35:36.487] 🔨 mined potential block number=61 hash=fe871e…560170 14 INFO [06-30|15:35:36.488] Commit new mining work number=62 sealhash=314d24…1b4ece uncles=0 txs=0 gas=0 fees=0 elapsed=165.646µs 15 INFO [06-30|15:35:36.772] Successfully sealed new block number=62 sealhash=314d24…1b4ece hash=052003…b1004c elapsed=284.138ms
终端2：
1 ====================== 2 3 Deploying 'Migrations' 4 ---------------------- 5 > transaction hash: 0x39a329ee6f0afa49a9a2ebe20c3c8546ac51d081e869ccca1ad34e3e1bc43457 6 > Blocks: 1 Seconds: 386 7 > contract address: 0xff6cbFDEEDBA3E0f3714bBA7267658357C351D28 8 > block number: 58 9 > block timestamp: 1561879271 10 > account: 0x8830397771710ADE101f0080f0da076181Bad374 11 > balance: 289 12 > gas used: 284908 13 > gas price: 20 gwei 14 > value sent: 0 ETH 15 > total cost: 0.00569816 ETH 16 17 18 > Saving migration to chain. 19 > Saving artifacts 20 ------------------------------------- 21 > Total cost: 0.00569816 ETH 22 23 24 2_deploy_contracys.js 25 ===================== 26 27 Deploying 'Test' 28 ---------------- 29 > transaction hash: 0x803270c2ee1625c05fd55902b437d567a56618856f665ee4260dcad59b3526cd 30 > Blocks: 0 Seconds: 0 31 > contract address: 0xa12E7a68Cd8F79a0978DdD5764B943Ef9d685493 32 > block number: 60 33 > block timestamp: 1561880132 34 > account: 0x8830397771710ADE101f0080f0da076181Bad374 35 > balance: 309 36 > gas used: 106241 37 > gas price: 20 gwei 38 > value sent: 0 ETH 39 > total cost: 0.00212482 ETH 40 41 42 > Saving migration to chain. 43 > Saving artifacts 44 ------------------------------------- 45 > Total cost: 0.00212482 ETH 46 47 48 Summary 49 ======= 50 > Total deployments: 2 51 > Final cost: 0.00782298 ETH
五、调用合约
以上操作后，我们的简单智能合约就部署完成了
下面我们进行合约的调用
打开truffle_Project/bulid/contracts/Test.json文件，可以看到以下内容
{ abi: [{ constant: false, inputs: [{...}], name: "multiply", outputs: [{...}], payable: false, type: "function" }], address: "0xa12E7a68Cd8F79a0978DdD5764B943Ef9d685493", transactionHash: null, allEvents: function(), multiply: function() } "compiler": { "name": "solc", "version": "0.5.0+commit.1d4f565a.Emscripten.clang" }, "networks": { "100": { "events": {}, "links": {}, "address": "0xa12E7a68Cd8F79a0978DdD5764B943Ef9d685493", "transactionHash": "0x803270c2ee1625c05fd55902b437d567a56618856f665ee4260dcad59b3526cd" } }, "schemaVersion": "3.0.9", "updatedAt": "2019-06-30T07:35:39.931Z",
将abi中的内容的内容拿出来先在线压缩，在终端1输入如下：
1 > abi=[{"constant":false,"inputs":[{"name":"a","type":"uint256"}],"name":"multiply","outputs":[{"name":"d","type":"uint256"}],"payable":false,"type":"function"}]
输出：
1 [{ 2 constant: false, 3 inputs: [{ 4 name: "a", 5 type: "uint256" 6 }], 7 name: "multiply", 8 outputs: [{ 9 name: "d", 10 type: "uint256" 11 }], 12 payable: false, 13 type: "function" 14 }]
接着在终端1输入：
1 > test=eth.contract(abi).at("0xa12E7a68Cd8F79a0978DdD5764B943Ef9d685493")
其中这个地址可以在上面的Test.json中看到
之后我们就可以调用啦，在终端1中输入：
1 > test.multiply.call(100) 2 700
可以看出成功调用了我们写的合约，到这里所有的工作就完成了
