安装abigen，以太坊合约转go代码及调用合约

go get github.com/ethereum/go-ethereum
用go mod的话 安装包位置：$GOPATH/pkg/mod/.

cd $GOPATH/pkg/mod/github.com/ethereum/go-ethereum@v1.10.17
sudo make && make devtools

appledeMac-mini:~ apple$ abigen  --help
abigen [global options] command [command options] [arguments...]

VERSION:
   1.10.17-stable

COMMANDS:
   help                               Shows a list of commands or help for one command
   
GLOBAL OPTIONS:
   --abi value                        Path to the Ethereum contract ABI json to bind, - for STDIN
   --bin value                        Path to the Ethereum contract bytecode (generate deploy method)
   --type value                       Struct name for the binding (default = package name)
   --combined-json value              Path to the combined-json file generated by compiler
   --sol value                        Path to the Ethereum contract Solidity source to build and bind
   --solc value                       Solidity compiler to use if source builds are requested (default: "solc")
   --vy value                         Path to the Ethereum contract Vyper source to build and bind
   --vyper value                      Vyper compiler to use if source builds are requested (default: "vyper")
   --exc value                        Comma separated types to exclude from binding
   --pkg value                        Package name to generate the binding into
   --out value                        Output file for the generated binding (default = stdout)
   --lang value                       Destination language for the bindings (go, java, objc) (default: "go")
   --alias value                      Comma separated aliases for function and event renaming, e.g. original1=alias1, original2=alias2
   --help, -h                         show help
   --version, -v                      print the version

将.abi转成go代码
abigen -abi ERC20.abi -type ERC20 -pkg main -out ERC20.go
1.abi 要绑定的以太坊合约abi json的路径，-用于STDIN
以太坊合约字节码的路径(生成部署方法)
2. type 绑定的结构名称(默认=包名)
3. pkg要生成绑定到的包名
生成的绑定的输出文件(默认= stdout)
绑定的目标语言(go, java, objc)(默认值:“go”)
4.out 输出文件名

原始合约文件

转化后的go文件

调用合约服务（生成包改成（-pkg ） tools了，可以直接调tools下转化来的合约代码） :

package service

import (
	"context"
	"firstproject/tools"
	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/ethclient"
)

type sGethser struct{}

// 管理职能合约服务
func Gethser() *sGethser {
	return &sGethser{}
}

// 创建合约对象
func (s *sGethser) CommonEth(ctx context.Context, ethconnhost, calls string) (*tools.ERC20Caller, error) {
	// Dial connects a client to the given URL
	// ethconnhost 以太坊地址  calls 智能合约账户地址
	conn, err := ethclient.Dial(ethconnhost)
	if err != nil {
		panic("连接以太坊出错")
	}
	// 查询等 *** 作可以连接返回后关闭连接
	// defer conn.Close()
	// 生成合约实例 , NewCallOpts creates a new option set for contract calls.
	gethObject, err := tools.NewERC20Caller(common.HexToAddress(calls), conn)
	if err != nil {
		panic("创建合约对象出错")
	}
	return gethObject, nil
}

// todo 调用合约对象处理业务逻辑
func (s *sGethser) DoFunc(ctx context.Context) error {
	//
	gethObject, err := s.CommonEth(ctx, "", "")
	if err != nil {
		return err
	}

	// 调用合约方法
	gethObject.Name(nil)

	return nil
}

.sol–>.abi–>.go
安装 solidity

brew install solidity

if [  == "build" ]; then
    rm -rf contracts/
    for i in "BasOANN" "BasMarket" "BasMail" "BasView"; do
        solc contract_sol/$i.sol --abi  -o contracts
    done
    for i in $(ls ./contracts/); do
#            echo ${i%%.*}
            abigen -abi contracts/${i%%.*}.abi -type ${i%%.*} -pkg contracts -out contracts/${i%%.*}.go
    done
fi
#if [  == "build_go" ]; then
#    for i in $(ls ./contracts/); do
#        echo $i
#        abigen -abi contracts/$i.abi -type $i -pkg contracts -out contracts/$i.go
#    done
#fi