github.com/linapex/ethereum-dpos-chinese@v0.0.0-20190316121959-b78b3a4a1ece/cmd/abigen/main.go (about)

     1  
     2  //<developer>
     3  //    <name>linapex 曹一峰</name>
     4  //    <email>linapex@163.com</email>
     5  //    <wx>superexc</wx>
     6  //    <qqgroup>128148617</qqgroup>
     7  //    <url>https://jsq.ink</url>
     8  //    <role>pku engineer</role>
     9  //    <date>2019-03-16 12:09:27</date>
    10  //</624342588459061248>
    11  
    12  
    13  package main
    14  
    15  import (
    16  	"encoding/json"
    17  	"flag"
    18  	"fmt"
    19  	"io/ioutil"
    20  	"os"
    21  	"strings"
    22  
    23  	"github.com/ethereum/go-ethereum/accounts/abi/bind"
    24  	"github.com/ethereum/go-ethereum/common/compiler"
    25  )
    26  
    27  var (
    28  	abiFlag = flag.String("abi", "", "Path to the Ethereum contract ABI json to bind, - for STDIN")
    29  	binFlag = flag.String("bin", "", "Path to the Ethereum contract bytecode (generate deploy method)")
    30  	typFlag = flag.String("type", "", "Struct name for the binding (default = package name)")
    31  
    32  	solFlag  = flag.String("sol", "", "Path to the Ethereum contract Solidity source to build and bind")
    33  	solcFlag = flag.String("solc", "solc", "Solidity compiler to use if source builds are requested")
    34  	excFlag  = flag.String("exc", "", "Comma separated types to exclude from binding")
    35  
    36  	pkgFlag  = flag.String("pkg", "", "Package name to generate the binding into")
    37  	outFlag  = flag.String("out", "", "Output file for the generated binding (default = stdout)")
    38  	langFlag = flag.String("lang", "go", "Destination language for the bindings (go, java, objc)")
    39  )
    40  
    41  func main() {
    42  //分析并确保指定了所有需要的输入
    43  	flag.Parse()
    44  
    45  	if *abiFlag == "" && *solFlag == "" {
    46  		fmt.Printf("No contract ABI (--abi) or Solidity source (--sol) specified\n")
    47  		os.Exit(-1)
    48  	} else if (*abiFlag != "" || *binFlag != "" || *typFlag != "") && *solFlag != "" {
    49  		fmt.Printf("Contract ABI (--abi), bytecode (--bin) and type (--type) flags are mutually exclusive with the Solidity source (--sol) flag\n")
    50  		os.Exit(-1)
    51  	}
    52  	if *pkgFlag == "" {
    53  		fmt.Printf("No destination package specified (--pkg)\n")
    54  		os.Exit(-1)
    55  	}
    56  	var lang bind.Lang
    57  	switch *langFlag {
    58  	case "go":
    59  		lang = bind.LangGo
    60  	case "java":
    61  		lang = bind.LangJava
    62  	case "objc":
    63  		lang = bind.LangObjC
    64  	default:
    65  		fmt.Printf("Unsupported destination language \"%s\" (--lang)\n", *langFlag)
    66  		os.Exit(-1)
    67  	}
    68  //如果指定了整个solidity代码，则基于该代码构建和绑定
    69  	var (
    70  		abis  []string
    71  		bins  []string
    72  		types []string
    73  	)
    74  	if *solFlag != "" || *abiFlag == "-" {
    75  //生成要从绑定中排除的类型列表
    76  		exclude := make(map[string]bool)
    77  		for _, kind := range strings.Split(*excFlag, ",") {
    78  			exclude[strings.ToLower(kind)] = true
    79  		}
    80  
    81  		var contracts map[string]*compiler.Contract
    82  		var err error
    83  		if *solFlag != "" {
    84  			contracts, err = compiler.CompileSolidity(*solcFlag, *solFlag)
    85  			if err != nil {
    86  				fmt.Printf("Failed to build Solidity contract: %v\n", err)
    87  				os.Exit(-1)
    88  			}
    89  		} else {
    90  			contracts, err = contractsFromStdin()
    91  			if err != nil {
    92  				fmt.Printf("Failed to read input ABIs from STDIN: %v\n", err)
    93  				os.Exit(-1)
    94  			}
    95  		}
    96  //收集所有未排除的合同进行约束
    97  		for name, contract := range contracts {
    98  			if exclude[strings.ToLower(name)] {
    99  				continue
   100  			}
   101  abi, _ := json.Marshal(contract.Info.AbiDefinition) //扁平化编译器分析
   102  			abis = append(abis, string(abi))
   103  			bins = append(bins, contract.Code)
   104  
   105  			nameParts := strings.Split(name, ":")
   106  			types = append(types, nameParts[len(nameParts)-1])
   107  		}
   108  	} else {
   109  //否则，从参数中加载abi、可选字节码和类型名。
   110  		abi, err := ioutil.ReadFile(*abiFlag)
   111  		if err != nil {
   112  			fmt.Printf("Failed to read input ABI: %v\n", err)
   113  			os.Exit(-1)
   114  		}
   115  		abis = append(abis, string(abi))
   116  
   117  		bin := []byte{}
   118  		if *binFlag != "" {
   119  			if bin, err = ioutil.ReadFile(*binFlag); err != nil {
   120  				fmt.Printf("Failed to read input bytecode: %v\n", err)
   121  				os.Exit(-1)
   122  			}
   123  		}
   124  		bins = append(bins, string(bin))
   125  
   126  		kind := *typFlag
   127  		if kind == "" {
   128  			kind = *pkgFlag
   129  		}
   130  		types = append(types, kind)
   131  	}
   132  //生成合同绑定
   133  	code, err := bind.Bind(types, abis, bins, *pkgFlag, lang)
   134  	if err != nil {
   135  		fmt.Printf("Failed to generate ABI binding: %v\n", err)
   136  		os.Exit(-1)
   137  	}
   138  //将其刷新为文件或显示在标准输出上
   139  	if *outFlag == "" {
   140  		fmt.Printf("%s\n", code)
   141  		return
   142  	}
   143  	if err := ioutil.WriteFile(*outFlag, []byte(code), 0600); err != nil {
   144  		fmt.Printf("Failed to write ABI binding: %v\n", err)
   145  		os.Exit(-1)
   146  	}
   147  }
   148  
   149  func contractsFromStdin() (map[string]*compiler.Contract, error) {
   150  	bytes, err := ioutil.ReadAll(os.Stdin)
   151  	if err != nil {
   152  		return nil, err
   153  	}
   154  
   155  	return compiler.ParseCombinedJSON(bytes, "", "", "", "")
   156  }
   157