path: root/internal/ethapi/backend.go

// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum 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-ethereum 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-ethereum library. If not, see <http://www.gnu.org/licenses/>.

// Package ethapi implements the general Ethereum API functions.
package ethapi

import (
    "context"
    "math/big"

    ethereum "github.com/dexon-foundation/dexon"
    "github.com/dexon-foundation/dexon/accounts"
    "github.com/dexon-foundation/dexon/common"
    "github.com/dexon-foundation/dexon/core"
    "github.com/dexon-foundation/dexon/core/state"
    "github.com/dexon-foundation/dexon/core/types"
    "github.com/dexon-foundation/dexon/core/vm"
    "github.com/dexon-foundation/dexon/ethdb"
    "github.com/dexon-foundation/dexon/event"
    "github.com/dexon-foundation/dexon/params"
    "github.com/dexon-foundation/dexon/rpc"
)

type Downloader interface {
    Progress() ethereum.SyncProgress
}

// Backend interface provides the common API services (that are provided by
// both full and light clients) with access to necessary functions.
type Backend interface {
    // General Ethereum API
    Downloader() Downloader
    ProtocolVersion() int
    SuggestPrice(ctx context.Context) (*big.Int, error)
    ChainDb() ethdb.Database
    EventMux() *event.TypeMux
    AccountManager() *accounts.Manager
    RPCGasCap() *big.Int // global gas cap for eth_call over rpc: DoS protection

    // BlockChain API
    SetHead(number uint64)
    HeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Header, error)
    BlockByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*types.Block, error)
    StateAndHeaderByNumber(ctx context.Context, blockNr rpc.BlockNumber) (*state.StateDB, *types.Header, error)
    GetBlock(ctx context.Context, blockHash common.Hash) (*types.Block, error)
    GetReceipts(ctx context.Context, blockHash common.Hash) (types.Receipts, error)
    GetTd(blockHash common.Hash) *big.Int
    GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header) (*vm.EVM, func() error, error)
    SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription
    SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription
    SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) event.Subscription

    // TxPool API
    SendTx(ctx context.Context, signedTx *types.Transaction) error
    SendTxs(ctx context.Context, signedTxs []*types.Transaction) []error
    GetPoolTransactions() (types.Transactions, error)
    GetPoolTransaction(txHash common.Hash) *types.Transaction
    GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error)
    Stats() (pending int, queued int)
    TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions)
    SubscribeNewTxsEvent(chan<- core.NewTxsEvent) event.Subscription

    ChainConfig() *params.ChainConfig
    CurrentBlock() *types.Block
}

func GetAPIs(apiBackend Backend) []rpc.API {
    nonceLock := new(AddrLocker)
    return []rpc.API{
        {
            Namespace: "eth",
            Version:   "1.0",
            Service:   NewPublicEthereumAPI(apiBackend),
            Public:    true,
        }, {
            Namespace: "eth",
            Version:   "1.0",
            Service:   NewPublicBlockChainAPI(apiBackend),
            Public:    true,
        }, {
            Namespace: "eth",
            Version:   "1.0",
            Service:   NewPublicTransactionPoolAPI(apiBackend, nonceLock),
            Public:    true,
        }, {
            Namespace: "txpool",
            Version:   "1.0",
            Service:   NewPublicTxPoolAPI(apiBackend),
            Public:    true,
        }, {
            Namespace: "debug",
            Version:   "1.0",
            Service:   NewPublicDebugAPI(apiBackend),
            Public:    true,
        }, {
            Namespace: "debug",
            Version:   "1.0",
            Service:   NewPrivateDebugAPI(apiBackend),
        }, {
            Namespace: "eth",
            Version:   "1.0",
            Service:   NewPublicAccountAPI(apiBackend.AccountManager()),
            Public:    true,
        }, {
            Namespace: "personal",
            Version:   "1.0",
            Service:   NewPrivateAccountAPI(apiBackend, nonceLock),
            Public:    false,
        },
    }
}