上周在群聊吹牛，吹吹我写的golang 调用solana合约的东西。有人说他要学习go调用solidity的方法。我看了看我在登链的无abi调用合约的方法，写的python的，ethers的，solidity的，就是没写golang的，确实可以写写。
那个群里人都说用chatgpt都会用abigen的方式生成go包的方式调用合约方法。
所以我讲种不需要使用abigen生成go包的方法调用合约。
我还是喜欢使用我的晓道fork版，https://github.com/daog1/ethgo
fork自，umbracle/ethgo
好处我不讲，自己读代码。
合约调用最早都是需要abi文件生成的方式，后面还是有了更简单方式，最早我是ethers里面看到叫
a human-readable abi
ethers是这么写的：
// a human-readable abi; for interacting with the contract, we
// must include any fragment we wish to use
const abi = [
// read-only functions
"function balanceof(address owner) view returns (uint256)",
"function decimals() view returns (uint8)",
"function symbol() view returns (string)",
// authenticated functions
"function transfer(address to, uint amount) returns (bool)",
// events
"event transfer(address indexed from, address indexed to, uint amount)"
];
// this can be an address or an ens name
const address = "0x70ff5c5b1ad0533eaa5489e0d5ea01485d530674";
// read-only; by connecting to a provider, allows:
// - any constant function
// - querying filters
// - populating unsigned transactions for non-constant methods
// - estimating gas for non-constant (as an anonymous sender)
// - static calling non-constant methods (as anonymous sender)
const erc20 = new ethers.contract(address, abi, provider);
// read-write; by connecting to a signer, allows:
// - everything from read-only (except as signer, not anonymous)
// - sending transactions for non-constant functions
const erc20_rw = new ethers.contract(address, abi, signer);
ethgo 有点fork ethers的意思，所以也支持human-readable abi 的方式。
代码这么写
package main
import (
"fmt"
"math/big"
"github.com/umbracle/ethgo"
"github.com/umbracle/ethgo/abi"
"github.com/umbracle/ethgo/contract"
"github.com/umbracle/ethgo/jsonrpc"
)
func handleErr(err error) {
if err != nil {
panic(err)
}
}
func main() {
var functions = []string{
"function totalSupply() view returns (uint256)", //Human-Readable ABI
}
abiContract, err := abi.NewABIFromList(functions)
handleErr(err)
// Matic token
addr := ethgo.HexToAddress("0x7d1afa7b718fb893db30a3abc0cfc608aacfebb0")
client, err := jsonrpc.NewClient("https://eth.llamarpc.com")
handleErr(err)
c := contract.NewContract(addr, abiContract, contract.WithJsonRPC(client.Eth()))
res, err := c.Call("totalSupply", ethgo.Latest) //call totalSupply
handleErr(err)
fmt.Printf("TotalSupply: %s", res["0"].(*big.Int))
}
原版代码在这里：https://github.com/daog1/ethgo/blob/main/examples/contract-call-basic.go/blob/main/examples/contract-call-basic.go
我的那个fork 版，如果你发现什么问题，可以跟我说。
我一般都用human-readable abi 的方式调用，abigen这种太麻烦了，容易搞错。
