github.com/bigzoro/my_simplechain@v0.0.0-20240315012955-8ad0a2a29bb9/internal/ethapi/api_main.go

// Copyright 2015 The go-simplechain Authors
// This file is part of the go-simplechain library.
//
// The go-simplechain library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-simplechain library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-simplechain library. If not, see <http://www.gnu.org/licenses/>.
//go:build !sub
// +build !sub

package ethapi

import (
	"bytes"
	"context"
	"errors"
	"github.com/bigzoro/my_simplechain/crypto"
	"math/big"

	"github.com/bigzoro/my_simplechain/common"
	"github.com/bigzoro/my_simplechain/common/hexutil"
	"github.com/bigzoro/my_simplechain/core/types"
	"github.com/bigzoro/my_simplechain/log"
	"github.com/bigzoro/my_simplechain/rpc"
)

// SendTxArgs represents the arguments to sumbit a new transaction into the transaction pool.
type SendTxArgs struct {
	From     common.Address  `json:"from"`
	To       *common.Address `json:"to"`
	Gas      *hexutil.Uint64 `json:"gas"`
	GasPrice *hexutil.Big    `json:"gasPrice"`
	Value    *hexutil.Big    `json:"value"`
	Nonce    *hexutil.Uint64 `json:"nonce"`
	// We accept "data" and "input" for backwards-compatibility reasons. "input" is the
	// newer name and should be preferred by clients.
	Data  *hexutil.Bytes `json:"data"`
	Input *hexutil.Bytes `json:"input"`

	Endorsements []byte `json:"endorsements"`
}

// setDefaults is a helper function that fills in default values for unspecified tx fields.
func (args *SendTxArgs) setDefaults(ctx context.Context, b Backend) error {
	if args.GasPrice == nil {
		price, err := b.SuggestPrice(ctx)
		if err != nil {
			return err
		}
		args.GasPrice = (*hexutil.Big)(price)
	}
	if args.Value == nil {
		args.Value = new(hexutil.Big)
	}
	if args.Nonce == nil {
		nonce, err := b.GetPoolNonce(ctx, args.From)
		if err != nil {
			return err
		}
		args.Nonce = (*hexutil.Uint64)(&nonce)
	}
	if args.Data != nil && args.Input != nil && !bytes.Equal(*args.Data, *args.Input) {
		return errors.New(`both "data" and "input" are set and not equal. Please use "input" to pass transaction call data`)
	}
	if args.To == nil {
		// Contract creation
		var input []byte
		if args.Data != nil {
			input = *args.Data
		} else if args.Input != nil {
			input = *args.Input
		}
		if len(input) == 0 {
			return errors.New(`contract creation without any data provided`)
		}
	}
	// Estimate the gas usage if necessary.
	if args.Gas == nil {
		// For backwards-compatibility reason, we try both input and data
		// but input is preferred.
		input := args.Input
		if input == nil {
			input = args.Data
		}
		callArgs := CallArgs{
			From:     &args.From, // From shouldn't be nil
			To:       args.To,
			GasPrice: args.GasPrice,
			Value:    args.Value,
			Data:     input,
		}
		pendingBlockNr := rpc.BlockNumberOrHashWithNumber(rpc.PendingBlockNumber)
		estimated, err := DoEstimateGas(ctx, b, callArgs, pendingBlockNr, b.RPCGasCap())
		if err != nil {
			return err
		}
		args.Gas = &estimated
		log.Trace("Estimate gas usage automatically", "gas", args.Gas)
	}
	return nil
}

// SubmitTransaction is a helper function that submits tx to txPool and logs a message.
func SubmitTransaction(ctx context.Context, b Backend, tx *types.Transaction) (common.Hash, error) {
	if err := b.SendTx(ctx, tx); err != nil {
		return common.Hash{}, err
	}
	if tx.To() == nil {
		signer := types.MakeSigner(b.ChainConfig())
		from, err := types.Sender(signer, tx)
		if err != nil {
			return common.Hash{}, err
		}
		addr := crypto.CreateAddress(from, tx.Nonce())
		log.Info("Submitted contract creation", "fullHash", tx.Hash().Hex(), "contract", addr.Hex())
	} else {
		log.Info("Submitted transaction", "fullHash", tx.Hash().Hex(), "recipient", tx.To())
	}
	return tx.Hash(), nil
}

func (args *SendTxArgs) toTransaction() *types.Transaction {
	var input []byte
	if args.Input != nil {
		input = *args.Input
	} else if args.Data != nil {
		input = *args.Data
	}
	if args.To == nil {
		return types.NewContractCreation(uint64(*args.Nonce), (*big.Int)(args.Value), uint64(*args.Gas), (*big.Int)(args.GasPrice), input)
	}
	return types.NewTransaction(uint64(*args.Nonce), *args.To, (*big.Int)(args.Value), uint64(*args.Gas), (*big.Int)(args.GasPrice), input, args.Endorsements)
}