forked from cerc-io/plugeth
84041e8f31
Storage proofs were being unmarshalled from the RPC form to the go struct, but were not being included in the final returned struct.
237 lines
8.1 KiB
Go
237 lines
8.1 KiB
Go
// Copyright 2021 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// Package gethclient provides an RPC client for geth-specific APIs.
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package gethclient
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import (
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"context"
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"math/big"
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"runtime"
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"runtime/debug"
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"github.com/ethereum/go-ethereum"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/rpc"
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)
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// Client is a wrapper around rpc.Client that implements geth-specific functionality.
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//
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// If you want to use the standardized Ethereum RPC functionality, use ethclient.Client instead.
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type Client struct {
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c *rpc.Client
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}
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// New creates a client that uses the given RPC client.
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func New(c *rpc.Client) *Client {
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return &Client{c}
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}
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// CreateAccessList tries to create an access list for a specific transaction based on the
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// current pending state of the blockchain.
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func (ec *Client) CreateAccessList(ctx context.Context, msg ethereum.CallMsg) (*types.AccessList, uint64, string, error) {
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type accessListResult struct {
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Accesslist *types.AccessList `json:"accessList"`
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Error string `json:"error,omitempty"`
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GasUsed hexutil.Uint64 `json:"gasUsed"`
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}
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var result accessListResult
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if err := ec.c.CallContext(ctx, &result, "eth_createAccessList", toCallArg(msg)); err != nil {
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return nil, 0, "", err
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}
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return result.Accesslist, uint64(result.GasUsed), result.Error, nil
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}
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// AccountResult is the result of a GetProof operation.
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type AccountResult struct {
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Address common.Address `json:"address"`
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AccountProof []string `json:"accountProof"`
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Balance *big.Int `json:"balance"`
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CodeHash common.Hash `json:"codeHash"`
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Nonce uint64 `json:"nonce"`
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StorageHash common.Hash `json:"storageHash"`
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StorageProof []StorageResult `json:"storageProof"`
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}
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// StorageResult provides a proof for a key-value pair.
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type StorageResult struct {
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Key string `json:"key"`
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Value *big.Int `json:"value"`
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Proof []string `json:"proof"`
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}
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// GetProof returns the account and storage values of the specified account including the Merkle-proof.
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// The block number can be nil, in which case the value is taken from the latest known block.
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func (ec *Client) GetProof(ctx context.Context, account common.Address, keys []string, blockNumber *big.Int) (*AccountResult, error) {
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type storageResult struct {
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Key string `json:"key"`
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Value *hexutil.Big `json:"value"`
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Proof []string `json:"proof"`
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}
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type accountResult struct {
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Address common.Address `json:"address"`
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AccountProof []string `json:"accountProof"`
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Balance *hexutil.Big `json:"balance"`
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CodeHash common.Hash `json:"codeHash"`
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Nonce hexutil.Uint64 `json:"nonce"`
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StorageHash common.Hash `json:"storageHash"`
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StorageProof []storageResult `json:"storageProof"`
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}
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var res accountResult
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err := ec.c.CallContext(ctx, &res, "eth_getProof", account, keys, toBlockNumArg(blockNumber))
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// Turn hexutils back to normal datatypes
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storageResults := make([]StorageResult, 0, len(res.StorageProof))
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for _, st := range res.StorageProof {
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storageResults = append(storageResults, StorageResult{
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Key: st.Key,
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Value: st.Value.ToInt(),
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Proof: st.Proof,
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})
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}
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result := AccountResult{
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Address: res.Address,
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AccountProof: res.AccountProof,
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Balance: res.Balance.ToInt(),
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Nonce: uint64(res.Nonce),
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CodeHash: res.CodeHash,
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StorageHash: res.StorageHash,
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StorageProof: storageResults,
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}
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return &result, err
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}
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// OverrideAccount specifies the state of an account to be overridden.
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type OverrideAccount struct {
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Nonce uint64 `json:"nonce"`
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Code []byte `json:"code"`
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Balance *big.Int `json:"balance"`
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State map[common.Hash]common.Hash `json:"state"`
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StateDiff map[common.Hash]common.Hash `json:"stateDiff"`
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}
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// CallContract executes a message call transaction, which is directly executed in the VM
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// of the node, but never mined into the blockchain.
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//
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// blockNumber selects the block height at which the call runs. It can be nil, in which
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// case the code is taken from the latest known block. Note that state from very old
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// blocks might not be available.
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//
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// overrides specifies a map of contract states that should be overwritten before executing
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// the message call.
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// Please use ethclient.CallContract instead if you don't need the override functionality.
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func (ec *Client) CallContract(ctx context.Context, msg ethereum.CallMsg, blockNumber *big.Int, overrides *map[common.Address]OverrideAccount) ([]byte, error) {
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var hex hexutil.Bytes
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err := ec.c.CallContext(
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ctx, &hex, "eth_call", toCallArg(msg),
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toBlockNumArg(blockNumber), toOverrideMap(overrides),
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)
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return hex, err
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}
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// GCStats retrieves the current garbage collection stats from a geth node.
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func (ec *Client) GCStats(ctx context.Context) (*debug.GCStats, error) {
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var result debug.GCStats
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err := ec.c.CallContext(ctx, &result, "debug_gcStats")
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return &result, err
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}
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// MemStats retrieves the current memory stats from a geth node.
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func (ec *Client) MemStats(ctx context.Context) (*runtime.MemStats, error) {
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var result runtime.MemStats
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err := ec.c.CallContext(ctx, &result, "debug_memStats")
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return &result, err
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}
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// SetHead sets the current head of the local chain by block number.
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// Note, this is a destructive action and may severely damage your chain.
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// Use with extreme caution.
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func (ec *Client) SetHead(ctx context.Context, number *big.Int) error {
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return ec.c.CallContext(ctx, nil, "debug_setHead", toBlockNumArg(number))
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}
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// GetNodeInfo retrieves the node info of a geth node.
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func (ec *Client) GetNodeInfo(ctx context.Context) (*p2p.NodeInfo, error) {
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var result p2p.NodeInfo
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err := ec.c.CallContext(ctx, &result, "admin_nodeInfo")
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return &result, err
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}
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// SubscribePendingTransactions subscribes to new pending transactions.
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func (ec *Client) SubscribePendingTransactions(ctx context.Context, ch chan<- common.Hash) (*rpc.ClientSubscription, error) {
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return ec.c.EthSubscribe(ctx, ch, "newPendingTransactions")
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}
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func toBlockNumArg(number *big.Int) string {
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if number == nil {
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return "latest"
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}
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pending := big.NewInt(-1)
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if number.Cmp(pending) == 0 {
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return "pending"
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}
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return hexutil.EncodeBig(number)
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}
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func toCallArg(msg ethereum.CallMsg) interface{} {
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arg := map[string]interface{}{
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"from": msg.From,
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"to": msg.To,
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}
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if len(msg.Data) > 0 {
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arg["data"] = hexutil.Bytes(msg.Data)
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}
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if msg.Value != nil {
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arg["value"] = (*hexutil.Big)(msg.Value)
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}
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if msg.Gas != 0 {
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arg["gas"] = hexutil.Uint64(msg.Gas)
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}
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if msg.GasPrice != nil {
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arg["gasPrice"] = (*hexutil.Big)(msg.GasPrice)
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}
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return arg
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}
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func toOverrideMap(overrides *map[common.Address]OverrideAccount) interface{} {
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if overrides == nil {
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return nil
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}
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type overrideAccount struct {
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Nonce hexutil.Uint64 `json:"nonce"`
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Code hexutil.Bytes `json:"code"`
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Balance *hexutil.Big `json:"balance"`
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State map[common.Hash]common.Hash `json:"state"`
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StateDiff map[common.Hash]common.Hash `json:"stateDiff"`
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}
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result := make(map[common.Address]overrideAccount)
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for addr, override := range *overrides {
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result[addr] = overrideAccount{
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Nonce: hexutil.Uint64(override.Nonce),
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Code: override.Code,
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Balance: (*hexutil.Big)(override.Balance),
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State: override.State,
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StateDiff: override.StateDiff,
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}
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}
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return &result
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}
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