在Go SDK中进行以太坊智能合约部署指南

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我正在尝试在 go sdk 中部署以太坊智能合约，但出现一些错误

./inbox_test.go:20:44: not enough arguments in call to backends.newsimulatedbackend
        have (core.genesisalloc)
        want (core.genesisalloc, uint64)

我正在按照分步指南在 go 中部署智能合约，但我无法执行此操作

func TestDeployInbox(t *testing.T) {

    //Setup simulated block chain
    key, _ := crypto.GenerateKey()
    auth := bind.NewKeyedTransactor(key)
    alloc := make(core.GenesisAlloc)
    alloc[auth.From] = core.GenesisAccount{Balance: big.NewInt(1000000000)}
    blockchain := backends.NewSimulatedBackend(alloc)

    //Deploy contract
    address, _, _, err := DeployInbox(
        auth,
        blockchain,
        "Hello World",
    )
    // commit all pending transactions
    blockchain.Commit()

    if err != nil {
        t.Fatalf("Failed to deploy the Inbox contract: %v", err)
    }

    if len(address.Bytes()) == 0 {
        t.Error("Expected a valid deployment address. Received empty address byte array instead")
    }

}

这段代码应该在go sdk中部署智能合约

解决方案

newsimulatedbackend 的方法签名已更改。原样：

https://github.com/ethereum/go-ethereum/blob/master/accounts/abi/bind/backends/simulated.go#L68

// newsimulatedbackend creates a new binding backend using a simulated blockchain
// for testing purposes.
func newsimulatedbackend(alloc core.genesisalloc, gaslimit uint64) *simulatedbackend {
    database := rawdb.newmemorydatabase()
    genesis := core.genesis{config: params.allethashprotocolchanges, gaslimit: gaslimit, alloc: alloc}
    genesis.mustcommit(database)
    blockchain, _ := core.newblockchain(database, nil, genesis.config, ethash.newfaker(), vm.config{}, nil)

    backend := &simulatedbackend{
        database:   database,
        blockchain: blockchain,
        config:     genesis.config,
        events:     filters.neweventsystem(new(event.typemux), &filterbackend{database, blockchain}, false),
    }
    backend.rollback()
    return backend
}

您还需要传递 gaslimit。像这样的事情：

gasPrice, err := client.SuggestGasPrice(context.Background())
if err != nil {
    log.Fatal(err)
}

key, _ := crypto.GenerateKey()
auth := bind.NewKeyedTransactor(key)

auth.GasLimit = uint64(300000) // in units
auth.GasPrice = gasPrice

alloc := make(core.GenesisAlloc)
alloc[auth.From] = core.GenesisAccount{Balance: big.NewInt(1000000000)}
blockchain := backends.NewSimulatedBackend(alloc, auth.GasLimit)

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