ipld-eth-server/pkg/eth/api.go

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// VulcanizeDB
// Copyright © 2019 Vulcanize
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program 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 Affero General Public License for more details.
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package eth
import (
"context"
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"database/sql"
"encoding/json"
"errors"
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"fmt"
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"io"
"math/big"
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"strconv"
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"time"
"github.com/cerc-io/ipld-eth-server/v4/pkg/log"
ipld_eth_statedb "github.com/cerc-io/ipld-eth-statedb"
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"github.com/ethereum/go-ethereum/accounts/abi"
"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/common/math"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/eth/filters"
"github.com/ethereum/go-ethereum/ethclient"
"github.com/ethereum/go-ethereum/rlp"
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"github.com/ethereum/go-ethereum/rpc"
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"github.com/ethereum/go-ethereum/statediff"
"github.com/cerc-io/ipld-eth-server/v4/pkg/shared"
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)
const (
defaultEVMTimeout = 30 * time.Second
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)
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// APIName is the namespace for the watcher's eth api
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const APIName = "eth"
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// APIVersion is the version of the watcher's eth api
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const APIVersion = "0.0.1"
type APIConfig struct {
// Proxy node for forwarding cache misses
SupportsStateDiff bool // Whether the remote node supports the statediff_writeStateDiffAt endpoint, if it does we can fill the local cache when we hit a miss
ForwardEthCalls bool // if true, forward eth_call calls directly to the configured proxy node
ForwardGetStorageAt bool // if true, forward eth_getStorageAt calls directly to the configured proxy node
ProxyOnError bool // turn on regular proxy fall-through on errors; needed to test difference between direct and indirect fall-through
StateDiffTimeout time.Duration
}
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// PublicEthAPI is the eth namespace API
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type PublicEthAPI struct {
// Local db backend
B *Backend
rpc *rpc.Client
ethClient *ethclient.Client
config APIConfig
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}
// NewPublicEthAPI creates a new PublicEthAPI with the provided underlying Backend
func NewPublicEthAPI(b *Backend, client *rpc.Client, config APIConfig) (*PublicEthAPI, error) {
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if b == nil {
return nil, errors.New("ipld-eth-server must be configured with an ethereum backend")
}
if config.ForwardEthCalls && client == nil {
return nil, errors.New("ipld-eth-server is configured to forward eth_calls to proxy node but no proxy node is configured")
}
if config.ForwardGetStorageAt && client == nil {
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return nil, errors.New("ipld-eth-server is configured to forward eth_getStorageAt to proxy node but no proxy node is configured")
}
if config.ProxyOnError && client == nil {
return nil, errors.New("ipld-eth-server is configured to forward all calls to proxy node on errors but no proxy node is configured")
}
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var ethClient *ethclient.Client
if client != nil {
ethClient = ethclient.NewClient(client)
}
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return &PublicEthAPI{
B: b,
rpc: client,
ethClient: ethClient,
config: config,
}, nil
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}
/*
Headers and blocks
*/
// GetHeaderByNumber returns the requested canonical block header.
// * When blockNr is -1 the chain head is returned.
// * We cannot support pending block calls since we do not have an active miner
func (pea *PublicEthAPI) GetHeaderByNumber(ctx context.Context, number rpc.BlockNumber) (map[string]interface{}, error) {
header, err := pea.B.HeaderByNumber(ctx, number)
if header != nil && err == nil {
return pea.rpcMarshalHeader(header)
}
if pea.config.ProxyOnError {
if header, err := pea.ethClient.HeaderByNumber(ctx, big.NewInt(number.Int64())); header != nil && err == nil {
go pea.writeStateDiffAt(number.Int64())
return pea.rpcMarshalHeader(header)
}
}
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return nil, err
}
// GetHeaderByHash returns the requested header by hash.
func (pea *PublicEthAPI) GetHeaderByHash(ctx context.Context, hash common.Hash) map[string]interface{} {
header, err := pea.B.HeaderByHash(ctx, hash)
if header != nil && err == nil {
if res, err := pea.rpcMarshalHeader(header); err == nil {
return res
}
}
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if pea.config.ProxyOnError {
var result map[string]interface{}
if err := pea.rpc.CallContext(ctx, &result, "eth_getHeaderByHash", hash); result != nil && err == nil {
go pea.writeStateDiffFor(hash)
return result
}
}
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return nil
}
// rpcMarshalHeader uses the generalized output filler, then adds the total difficulty field
func (pea *PublicEthAPI) rpcMarshalHeader(header *types.Header) (map[string]interface{}, error) {
fields := RPCMarshalHeader(header)
td, err := pea.B.GetTd(header.Hash())
if err != nil {
return nil, err
}
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fields["totalDifficulty"] = (*hexutil.Big)(td)
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return fields, nil
}
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// BlockNumber returns the block number of the chain head.
func (pea *PublicEthAPI) BlockNumber() hexutil.Uint64 {
number, _ := pea.B.Retriever.RetrieveLastBlockNumber()
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return hexutil.Uint64(number)
}
// GetBlockByNumber returns the requested canonical block.
// * When blockNr is -1 the chain head is returned.
// * We cannot support pending block calls since we do not have an active miner
// * When fullTx is true all transactions in the block are returned, otherwise
// only the transaction hash is returned.
func (pea *PublicEthAPI) GetBlockByNumber(ctx context.Context, number rpc.BlockNumber, fullTx bool) (map[string]interface{}, error) {
block, err := pea.B.BlockByNumber(ctx, number)
if block != nil && err == nil {
return pea.rpcMarshalBlock(block, true, fullTx)
}
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if pea.config.ProxyOnError {
if block, err := pea.ethClient.BlockByNumber(ctx, big.NewInt(number.Int64())); block != nil && err == nil {
go pea.writeStateDiffAt(number.Int64())
return pea.rpcMarshalBlock(block, true, fullTx)
}
}
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return nil, err
}
// GetBlockByHash returns the requested block. When fullTx is true all transactions in the block are returned in full
// detail, otherwise only the transaction hash is returned.
func (pea *PublicEthAPI) GetBlockByHash(ctx context.Context, hash common.Hash, fullTx bool) (map[string]interface{}, error) {
block, err := pea.B.BlockByHash(ctx, hash)
if block != nil && err == nil {
return pea.rpcMarshalBlock(block, true, fullTx)
}
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if pea.config.ProxyOnError {
if block, err := pea.ethClient.BlockByHash(ctx, hash); block != nil && err == nil {
go pea.writeStateDiffFor(hash)
return pea.rpcMarshalBlock(block, true, fullTx)
}
}
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return nil, err
}
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// ChainId is the EIP-155 replay-protection chain id for the current ethereum chain config.
func (pea *PublicEthAPI) ChainId() *hexutil.Big {
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if pea.B.Config.ChainConfig.ChainID == nil || pea.B.Config.ChainConfig.ChainID.Cmp(big.NewInt(0)) <= 0 {
if pea.config.ProxyOnError {
if id, err := pea.ethClient.ChainID(context.Background()); err == nil {
return (*hexutil.Big)(id)
}
}
return nil
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}
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return (*hexutil.Big)(pea.B.Config.ChainConfig.ChainID)
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}
/*
Uncles
*/
// GetUncleByBlockNumberAndIndex returns the uncle block for the given block hash and index. When fullTx is true
// all transactions in the block are returned in full detail, otherwise only the transaction hash is returned.
func (pea *PublicEthAPI) GetUncleByBlockNumberAndIndex(ctx context.Context, blockNr rpc.BlockNumber, index hexutil.Uint) (map[string]interface{}, error) {
block, err := pea.B.BlockByNumber(ctx, blockNr)
if block != nil && err == nil {
uncles := block.Uncles()
if index >= hexutil.Uint(len(uncles)) {
log.Debugxf(ctx, "uncle with index %s request at block number %d was not found", index.String(), blockNr.Int64())
return nil, nil
}
block = types.NewBlockWithHeader(uncles[index])
return pea.rpcMarshalBlock(block, false, false)
}
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if pea.config.ProxyOnError {
if uncle, uncleHashes, err := getBlockAndUncleHashes(pea.rpc, ctx, "eth_getUncleByBlockNumberAndIndex", blockNr, index); uncle != nil && err == nil {
go pea.writeStateDiffAt(blockNr.Int64())
return pea.rpcMarshalBlockWithUncleHashes(uncle, uncleHashes, false, false)
}
}
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return nil, err
}
// GetUncleByBlockHashAndIndex returns the uncle block for the given block hash and index. When fullTx is true
// all transactions in the block are returned in full detail, otherwise only the transaction hash is returned.
func (pea *PublicEthAPI) GetUncleByBlockHashAndIndex(ctx context.Context, blockHash common.Hash, index hexutil.Uint) (map[string]interface{}, error) {
block, err := pea.B.BlockByHash(ctx, blockHash)
if block != nil {
uncles := block.Uncles()
if index >= hexutil.Uint(len(uncles)) {
log.Debugxf(ctx, "uncle with index %s request at block hash %s was not found", index.String(), blockHash.Hex())
return nil, nil
}
block = types.NewBlockWithHeader(uncles[index])
return pea.rpcMarshalBlock(block, false, false)
}
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if pea.config.ProxyOnError {
if uncle, uncleHashes, err := getBlockAndUncleHashes(pea.rpc, ctx, "eth_getUncleByBlockHashAndIndex", blockHash, index); uncle != nil && err == nil {
go pea.writeStateDiffFor(blockHash)
return pea.rpcMarshalBlockWithUncleHashes(uncle, uncleHashes, false, false)
}
}
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return nil, err
}
// GetUncleCountByBlockNumber returns number of uncles in the block for the given block number
func (pea *PublicEthAPI) GetUncleCountByBlockNumber(ctx context.Context, blockNr rpc.BlockNumber) *hexutil.Uint {
if block, err := pea.B.BlockByNumber(ctx, blockNr); block != nil && err == nil {
n := hexutil.Uint(len(block.Uncles()))
return &n
}
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if pea.config.ProxyOnError {
var num *hexutil.Uint
if err := pea.rpc.CallContext(ctx, &num, "eth_getUncleCountByBlockNumber", blockNr); num != nil && err == nil {
go pea.writeStateDiffAt(blockNr.Int64())
return num
}
}
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return nil
}
// GetUncleCountByBlockHash returns number of uncles in the block for the given block hash
func (pea *PublicEthAPI) GetUncleCountByBlockHash(ctx context.Context, blockHash common.Hash) *hexutil.Uint {
if block, err := pea.B.BlockByHash(ctx, blockHash); block != nil && err == nil {
n := hexutil.Uint(len(block.Uncles()))
return &n
}
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if pea.config.ProxyOnError {
var num *hexutil.Uint
if err := pea.rpc.CallContext(ctx, &num, "eth_getUncleCountByBlockHash", blockHash); num != nil && err == nil {
go pea.writeStateDiffFor(blockHash)
return num
}
}
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return nil
}
/*
Transactions
*/
// GetTransactionCount returns the number of transactions the given address has sent for the given block number
func (pea *PublicEthAPI) GetTransactionCount(ctx context.Context, address common.Address, blockNrOrHash rpc.BlockNumberOrHash) (*hexutil.Uint64, error) {
count, err := pea.localGetTransactionCount(ctx, address, blockNrOrHash)
if count != nil && err == nil {
return count, nil
}
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if pea.config.ProxyOnError {
var num *hexutil.Uint64
if err := pea.rpc.CallContext(ctx, &num, "eth_getTransactionCount", address, blockNrOrHash); num != nil && err == nil {
go pea.writeStateDiffAtOrFor(blockNrOrHash)
return num, nil
}
}
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return nil, err
}
func (pea *PublicEthAPI) localGetTransactionCount(ctx context.Context, address common.Address, blockNrOrHash rpc.BlockNumberOrHash) (*hexutil.Uint64, error) {
account, err := pea.B.GetAccountByNumberOrHash(ctx, address, blockNrOrHash)
if err != nil {
return nil, err
}
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nonce := hexutil.Uint64(account.Nonce)
return &nonce, nil
}
// GetBlockTransactionCountByNumber returns the number of transactions in the block with the given block number.
func (pea *PublicEthAPI) GetBlockTransactionCountByNumber(ctx context.Context, blockNr rpc.BlockNumber) *hexutil.Uint {
if block, _ := pea.B.BlockByNumber(ctx, blockNr); block != nil {
n := hexutil.Uint(len(block.Transactions()))
return &n
}
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if pea.config.ProxyOnError {
var num *hexutil.Uint
if err := pea.rpc.CallContext(ctx, &num, "eth_getBlockTransactionCountByNumber", blockNr); num != nil && err == nil {
go pea.writeStateDiffAt(blockNr.Int64())
return num
}
}
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return nil
}
// GetBlockTransactionCountByHash returns the number of transactions in the block with the given hash.
func (pea *PublicEthAPI) GetBlockTransactionCountByHash(ctx context.Context, blockHash common.Hash) *hexutil.Uint {
if block, _ := pea.B.BlockByHash(ctx, blockHash); block != nil {
n := hexutil.Uint(len(block.Transactions()))
return &n
}
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if pea.config.ProxyOnError {
var num *hexutil.Uint
if err := pea.rpc.CallContext(ctx, &num, "eth_getBlockTransactionCountByHash", blockHash); num != nil && err == nil {
go pea.writeStateDiffFor(blockHash)
return num
}
}
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return nil
}
// GetTransactionByBlockNumberAndIndex returns the transaction for the given block number and index.
func (pea *PublicEthAPI) GetTransactionByBlockNumberAndIndex(ctx context.Context, blockNr rpc.BlockNumber, index hexutil.Uint) *RPCTransaction {
if block, _ := pea.B.BlockByNumber(ctx, blockNr); block != nil {
return newRPCTransactionFromBlockIndex(block, uint64(index))
}
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if pea.config.ProxyOnError {
var tx *RPCTransaction
if err := pea.rpc.CallContext(ctx, &tx, "eth_getTransactionByBlockNumberAndIndex", blockNr, index); tx != nil && err == nil {
go pea.writeStateDiffAt(blockNr.Int64())
return tx
}
}
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return nil
}
// GetTransactionByBlockHashAndIndex returns the transaction for the given block hash and index.
func (pea *PublicEthAPI) GetTransactionByBlockHashAndIndex(ctx context.Context, blockHash common.Hash, index hexutil.Uint) *RPCTransaction {
if block, _ := pea.B.BlockByHash(ctx, blockHash); block != nil {
return newRPCTransactionFromBlockIndex(block, uint64(index))
}
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if pea.config.ProxyOnError {
var tx *RPCTransaction
if err := pea.rpc.CallContext(ctx, &tx, "eth_getTransactionByBlockHashAndIndex", blockHash, index); tx != nil && err == nil {
go pea.writeStateDiffFor(blockHash)
return tx
}
}
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return nil
}
// GetRawTransactionByBlockNumberAndIndex returns the bytes of the transaction for the given block number and index.
func (pea *PublicEthAPI) GetRawTransactionByBlockNumberAndIndex(ctx context.Context, blockNr rpc.BlockNumber, index hexutil.Uint) hexutil.Bytes {
if block, _ := pea.B.BlockByNumber(ctx, blockNr); block != nil {
return newRPCRawTransactionFromBlockIndex(block, uint64(index))
}
if pea.config.ProxyOnError {
var tx hexutil.Bytes
if err := pea.rpc.CallContext(ctx, &tx, "eth_getRawTransactionByBlockNumberAndIndex", blockNr, index); tx != nil && err == nil {
go pea.writeStateDiffAt(blockNr.Int64())
return tx
}
}
return nil
}
// GetRawTransactionByBlockHashAndIndex returns the bytes of the transaction for the given block hash and index.
func (pea *PublicEthAPI) GetRawTransactionByBlockHashAndIndex(ctx context.Context, blockHash common.Hash, index hexutil.Uint) hexutil.Bytes {
if block, _ := pea.B.BlockByHash(ctx, blockHash); block != nil {
return newRPCRawTransactionFromBlockIndex(block, uint64(index))
}
if pea.config.ProxyOnError {
var tx hexutil.Bytes
if err := pea.rpc.CallContext(ctx, &tx, "eth_getRawTransactionByBlockHashAndIndex", blockHash, index); tx != nil && err == nil {
go pea.writeStateDiffFor(blockHash)
return tx
}
}
return nil
}
// GetTransactionByHash returns the transaction for the given hash
// eth ipld-eth-server cannot currently handle pending/tx_pool txs
func (pea *PublicEthAPI) GetTransactionByHash(ctx context.Context, hash common.Hash) (*RPCTransaction, error) {
tx, blockHash, blockNumber, index, err := pea.B.GetTransaction(ctx, hash)
if tx != nil && err == nil {
header, err := pea.B.HeaderByHash(ctx, blockHash)
if err != nil {
return nil, err
}
return NewRPCTransaction(tx, blockHash, blockNumber, index, header.BaseFee), nil
}
if pea.config.ProxyOnError {
var tx *RPCTransaction
if err := pea.rpc.CallContext(ctx, &tx, "eth_getTransactionByHash", hash); tx != nil && err == nil {
go pea.writeStateDiffFor(hash)
return tx, nil
}
}
return nil, err
}
// GetRawTransactionByHash returns the bytes of the transaction for the given hash.
func (pea *PublicEthAPI) GetRawTransactionByHash(ctx context.Context, hash common.Hash) (hexutil.Bytes, error) {
// Retrieve a finalized transaction, or a pooled otherwise
tx, _, _, _, err := pea.B.GetTransaction(ctx, hash)
if tx != nil && err == nil {
return rlp.EncodeToBytes(tx)
}
if pea.config.ProxyOnError {
var tx hexutil.Bytes
if err := pea.rpc.CallContext(ctx, &tx, "eth_getRawTransactionByHash", hash); tx != nil && err == nil {
go pea.writeStateDiffFor(hash)
return tx, nil
}
}
return nil, err
}
// accessListResult returns an optional accesslist
// Its the result of the `debug_createAccessList` RPC call.
// It contains an error if the transaction itself failed.
type accessListResult struct {
Accesslist *types.AccessList `json:"accessList"`
Error string `json:"error,omitempty"`
GasUsed hexutil.Uint64 `json:"gasUsed"`
}
// CreateAccessList creates a EIP-2930 type AccessList for the given transaction.
// Reexec and BlockNrOrHash can be specified to create the accessList on top of a certain state.
func (pea *PublicEthAPI) CreateAccessList(ctx context.Context, args TransactionArgs, blockNrOrHash *rpc.BlockNumberOrHash) (*accessListResult, error) {
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if pea.rpc != nil {
var res *accessListResult
if err := pea.rpc.CallContext(ctx, &res, "eth_createAccessList", args, blockNrOrHash); err != nil {
return nil, err
}
return res, nil
}
return nil, RequiresProxyError{method: "eth_createAccessList"}
}
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type feeHistoryResult struct {
OldestBlock *hexutil.Big `json:"oldestBlock"`
Reward [][]*hexutil.Big `json:"reward,omitempty"`
BaseFee []*hexutil.Big `json:"baseFeePerGas,omitempty"`
GasUsedRatio []float64 `json:"gasUsedRatio"`
}
// FeeHistory returns the fee market history.
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func (pea *PublicEthAPI) FeeHistory(ctx context.Context, blockCount int, lastBlock rpc.BlockNumber, rewardPercentiles []float64) (*feeHistoryResult, error) {
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if pea.rpc != nil {
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var res *feeHistoryResult
if err := pea.rpc.CallContext(ctx, &res, "eth_feeHistory", blockCount, lastBlock, rewardPercentiles); err != nil {
return nil, err
}
return res, nil
}
return nil, RequiresProxyError{method: "eth_feeHistory"}
}
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// EstimateGas returns an estimate of the amount of gas needed to execute the
// given transaction against the current pending block.
func (pea *PublicEthAPI) EstimateGas(ctx context.Context, args TransactionArgs, blockNrOrHash *rpc.BlockNumberOrHash) (hexutil.Uint64, error) {
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if pea.rpc != nil {
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var res hexutil.Uint64
if err := pea.rpc.CallContext(ctx, &res, "eth_estimateGas", args, blockNrOrHash); err != nil {
return hexutil.Uint64(0), err
}
return res, nil
}
return hexutil.Uint64(0), RequiresProxyError{method: "eth_estimateGas"}
}
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// GasPrice returns a suggestion for a gas price for legacy transactions.
func (pea *PublicEthAPI) GasPrice(ctx context.Context) (*hexutil.Big, error) {
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if pea.rpc != nil {
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var res *hexutil.Big
if err := pea.rpc.CallContext(ctx, &res, "eth_gasPrice"); err != nil {
return nil, err
}
return res, nil
}
return nil, RequiresProxyError{method: "eth_gasPrice"}
}
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// MaxPriorityFeePerGas returns a suggestion for a gas tip cap for dynamic fee transactions.
func (pea *PublicEthAPI) MaxPriorityFeePerGas(ctx context.Context) (*hexutil.Big, error) {
if pea.rpc != nil {
var res *hexutil.Big
if err := pea.rpc.CallContext(ctx, &res, "eth_maxPriorityFeePerGas"); err != nil {
return nil, err
}
return res, nil
}
return nil, RequiresProxyError{method: "eth_maxPriorityFeePerGas"}
}
/*
Receipts and Logs
*/
// GetTransactionReceipt returns the transaction receipt for the given transaction hash.
func (pea *PublicEthAPI) GetTransactionReceipt(ctx context.Context, hash common.Hash) (map[string]interface{}, error) {
receipt, err := pea.localGetTransactionReceipt(ctx, hash)
if receipt != nil && err == nil {
return receipt, nil
}
if pea.config.ProxyOnError {
if receipt := pea.remoteGetTransactionReceipt(ctx, hash); receipt != nil {
go pea.writeStateDiffFor(hash)
return receipt, nil
}
}
return nil, err
}
func (pea *PublicEthAPI) localGetTransactionReceipt(ctx context.Context, hash common.Hash) (map[string]interface{}, error) {
// TODO: this can be optimized for Postgres
tx, blockHash, blockNumber, index, err := pea.B.GetTransaction(ctx, hash)
if err != nil {
return nil, err
}
if tx == nil {
return nil, nil
}
receipts, err := pea.B.GetReceipts(ctx, blockHash)
if err != nil {
return nil, err
}
block, err := pea.B.BlockByHash(ctx, blockHash)
if err != nil {
return nil, err
}
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err = receipts.DeriveFields(pea.B.Config.ChainConfig, blockHash, blockNumber, block.BaseFee(), block.Transactions())
if err != nil {
return nil, err
}
if len(receipts) <= int(index) {
return nil, nil
}
receipt := receipts[index]
var signer types.Signer = types.FrontierSigner{}
if tx.Protected() {
signer = types.NewEIP155Signer(tx.ChainId())
}
from, _ := types.Sender(signer, tx)
fields := map[string]interface{}{
"blockHash": blockHash,
"blockNumber": hexutil.Uint64(blockNumber),
"transactionHash": hash,
"transactionIndex": hexutil.Uint64(index),
"from": from,
"to": tx.To(),
"gasUsed": hexutil.Uint64(receipt.GasUsed),
"cumulativeGasUsed": hexutil.Uint64(receipt.CumulativeGasUsed),
"contractAddress": nil,
"logs": receipt.Logs,
"logsBloom": receipt.Bloom,
}
// Assign receipt status or post state.
if len(receipt.PostState) > 0 {
fields["root"] = hexutil.Bytes(receipt.PostState)
} else {
fields["status"] = hexutil.Uint(receipt.Status)
}
if receipt.Logs == nil {
fields["logs"] = []*types.Log{}
}
// If the ContractAddress is 20 0x0 bytes, assume it is not a contract creation
if receipt.ContractAddress != (common.Address{}) {
fields["contractAddress"] = receipt.ContractAddress
}
return fields, nil
}
func (pea *PublicEthAPI) remoteGetTransactionReceipt(ctx context.Context, hash common.Hash) map[string]interface{} {
var rct *RPCReceipt
if err := pea.rpc.CallContext(ctx, &rct, "eth_getTransactionReceipt", hash); rct != nil && err == nil {
return map[string]interface{}{
"blockHash": rct.BlockHash,
"blockNumber": rct.BlockNumber,
"transactionHash": rct.TransactionHash,
"transactionIndex": rct.TransactionIndex,
"from": rct.From,
"to": rct.To,
"gasUsed": rct.GasUsed,
"cumulativeGasUsed": rct.CumulativeGsUsed,
"contractAddress": rct.ContractAddress,
"logs": rct.Logs,
"logsBloom": rct.Bloom,
"root": rct.Root,
"status": rct.Status,
}
}
return nil
}
// GetLogs returns logs matching the given argument that are stored within the state.
//
// https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_getlogs
func (pea *PublicEthAPI) GetLogs(ctx context.Context, crit filters.FilterCriteria) ([]*types.Log, error) {
logs, err := pea.localGetLogs(crit)
if err != nil && pea.config.ProxyOnError {
var res []*types.Log
if err := pea.rpc.CallContext(ctx, &res, "eth_getLogs", crit); err == nil {
go pea.writeStateDiffWithCriteria(crit)
return res, nil
}
}
return logs, err
}
func (pea *PublicEthAPI) localGetLogs(crit filters.FilterCriteria) ([]*types.Log, error) {
// TODO: this can be optimized away from using the old cid retriever and ipld fetcher interfaces
// Convert FilterQuery into ReceiptFilter
addrStrs := make([]string, len(crit.Addresses))
for i, addr := range crit.Addresses {
addrStrs[i] = addr.String()
}
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topicStrSets := make([][]string, len(crit.Topics))
for i, topicSet := range crit.Topics {
if i > 3 {
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topicStrSets = topicStrSets[:4]
// don't allow more than 4 topics
break
}
for _, topic := range topicSet {
topicStrSets[i] = append(topicStrSets[i], topic.String())
}
}
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filter := ReceiptFilter{
LogAddresses: addrStrs,
Topics: topicStrSets,
}
// Begin tx
tx, err := pea.B.DB.Beginx()
if err != nil {
return nil, err
}
defer func() {
if p := recover(); p != nil {
shared.Rollback(tx)
panic(p)
} else if err != nil {
shared.Rollback(tx)
} else {
err = tx.Commit()
}
}()
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// If we have a blockHash to filter on, fire off single retrieval query
if crit.BlockHash != nil {
filteredLogs, err := pea.B.Retriever.RetrieveFilteredLogs(tx, filter, 0, crit.BlockHash)
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if err != nil {
return nil, err
}
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return decomposeLogs(filteredLogs)
}
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// Otherwise, create block range from criteria
// nil values are filled in; to request a single block have both ToBlock and FromBlock equal that number
startingBlock := crit.FromBlock
endingBlock := crit.ToBlock
if startingBlock == nil {
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startingBlock = common.Big0
}
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if endingBlock == nil {
endingBlockInt, err := pea.B.Retriever.RetrieveLastBlockNumber()
if err != nil {
return nil, err
}
endingBlock = big.NewInt(endingBlockInt)
}
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start := startingBlock.Int64()
end := endingBlock.Int64()
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var logs []*types.Log
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for i := start; i <= end; i++ {
filteredLogs, err := pea.B.Retriever.RetrieveFilteredLogs(tx, filter, i, nil)
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if err != nil {
return nil, err
}
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logCIDs, err := decomposeLogs(filteredLogs)
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if err != nil {
return nil, err
}
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logs = append(logs, logCIDs...)
}
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if err := tx.Commit(); err != nil {
return nil, err
}
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return logs, err // need to return err variable so that we return the err = tx.Commit() assignment in the defer
}
/*
State and Storage
*/
// GetBalance returns the amount of wei for the given address in the state of the
// given block number. The rpc.LatestBlockNumber and rpc.PendingBlockNumber meta
// block numbers are also allowed.
func (pea *PublicEthAPI) GetBalance(ctx context.Context, address common.Address, blockNrOrHash rpc.BlockNumberOrHash) (*hexutil.Big, error) {
bal, err := pea.localGetBalance(ctx, address, blockNrOrHash)
if bal != nil && err == nil {
return bal, nil
}
if pea.config.ProxyOnError {
var res *hexutil.Big
if err := pea.rpc.CallContext(ctx, &res, "eth_getBalance", address, blockNrOrHash); res != nil && err == nil {
return res, nil
}
}
if err == sql.ErrNoRows {
return (*hexutil.Big)(big.NewInt(0)), nil
}
return nil, err
}
func (pea *PublicEthAPI) localGetBalance(ctx context.Context, address common.Address, blockNrOrHash rpc.BlockNumberOrHash) (*hexutil.Big, error) {
account, err := pea.B.GetAccountByNumberOrHash(ctx, address, blockNrOrHash)
if err != nil {
return nil, err
}
return (*hexutil.Big)(account.Balance), nil
}
// GetStorageAt returns the storage from the state at the given address, key and
// block number. The rpc.LatestBlockNumber and rpc.PendingBlockNumber meta block
// numbers are also allowed.
func (pea *PublicEthAPI) GetStorageAt(ctx context.Context, address common.Address, key string, blockNrOrHash rpc.BlockNumberOrHash) (hexutil.Bytes, error) {
if pea.config.ForwardGetStorageAt {
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var res hexutil.Bytes
// If forwarding all getStorageAt calls, don't request statediffing.
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err := pea.rpc.CallContext(ctx, &res, "eth_getStorageAt", address, key, blockNrOrHash)
return res, err
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}
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storageVal, err := pea.B.GetStorageByNumberOrHash(ctx, address, common.HexToHash(key), blockNrOrHash)
if storageVal != nil && err == nil {
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var value common.Hash
_, content, _, err := rlp.Split(storageVal)
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if err == io.ErrUnexpectedEOF {
return hexutil.Bytes{}, nil
}
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if err != nil {
return nil, err
}
value.SetBytes(content)
return value[:], nil
}
if pea.config.ProxyOnError {
log.Warnxf(ctx, "Missing eth_getStorageAt(%s, %s, %s)", address.Hash().String(), key, blockNrOrHash.String())
var res hexutil.Bytes
if err := pea.rpc.CallContext(ctx, &res, "eth_getStorageAt", address, key, blockNrOrHash); res != nil && err == nil {
return res, nil
}
}
if err == sql.ErrNoRows {
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return make([]byte, 32), nil
}
return nil, err
}
// GetCode returns the code stored at the given address in the state for the given block number.
func (pea *PublicEthAPI) GetCode(ctx context.Context, address common.Address, blockNrOrHash rpc.BlockNumberOrHash) (hexutil.Bytes, error) {
code, err := pea.B.GetCodeByNumberOrHash(ctx, address, blockNrOrHash)
if code != nil && err == nil {
return code, nil
}
if pea.config.ProxyOnError {
var res hexutil.Bytes
if err := pea.rpc.CallContext(ctx, &res, "eth_getCode", address, blockNrOrHash); res != nil && err == nil {
return res, nil
}
}
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if err == sql.ErrNoRows {
return code, nil
}
return nil, err
}
// GetProof returns the Merkle-proof for a given account and optionally some storage keys.
func (pea *PublicEthAPI) GetProof(ctx context.Context, address common.Address, storageKeys []string, blockNrOrHash rpc.BlockNumberOrHash) (*AccountResult, error) {
proof, err := pea.localGetProof(ctx, address, storageKeys, blockNrOrHash)
if proof != nil && err == nil {
return proof, nil
}
if pea.config.ProxyOnError {
var res *AccountResult
if err := pea.rpc.CallContext(ctx, &res, "eth_getProof", address, storageKeys, blockNrOrHash); res != nil && err == nil {
return res, nil
}
}
return nil, err
}
// this continues to use ipfs-ethdb based geth StateDB as it requires trie access
func (pea *PublicEthAPI) localGetProof(ctx context.Context, address common.Address, storageKeys []string, blockNrOrHash rpc.BlockNumberOrHash) (*AccountResult, error) {
state, _, err := pea.B.StateAndHeaderByNumberOrHash(ctx, blockNrOrHash)
if state == nil || err != nil {
return nil, err
}
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storageTrie, err := state.StorageTrie(address)
if storageTrie == nil || err != nil {
return nil, err
}
storageHash := types.EmptyRootHash
codeHash := state.GetCodeHash(address)
storageProof := make([]StorageResult, len(storageKeys))
// if we have a storageTrie, (which means the account exists), we can update the storagehash
if storageTrie != nil {
storageHash = storageTrie.Hash()
} else {
// no storageTrie means the account does not exist, so the codeHash is the hash of an empty bytearray.
codeHash = crypto.Keccak256Hash(nil)
}
// create the proof for the storageKeys
for i, key := range storageKeys {
if storageTrie != nil {
proof, storageError := state.GetStorageProof(address, common.HexToHash(key))
if storageError != nil {
return nil, storageError
}
storageProof[i] = StorageResult{key, (*hexutil.Big)(state.GetState(address, common.HexToHash(key)).Big()), toHexSlice(proof)}
} else {
storageProof[i] = StorageResult{key, &hexutil.Big{}, []string{}}
}
}
// create the accountProof
accountProof, proofErr := state.GetProof(address)
if proofErr != nil {
return nil, proofErr
}
return &AccountResult{
Address: address,
AccountProof: toHexSlice(accountProof),
Balance: (*hexutil.Big)(state.GetBalance(address)),
CodeHash: codeHash,
Nonce: hexutil.Uint64(state.GetNonce(address)),
StorageHash: storageHash,
StorageProof: storageProof,
}, state.Error()
}
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// GetSlice returns a slice of state or storage nodes from a provided root to a provided path and past it to a certain depth
func (pea *PublicEthAPI) GetSlice(ctx context.Context, path string, depth int, root common.Hash, storage bool) (*GetSliceResponse, error) {
return pea.B.GetSlice(path, depth, root, storage)
}
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// revertError is an API error that encompassas an EVM revertal with JSON error
// code and a binary data blob.
type revertError struct {
error
reason string // revert reason hex encoded
}
// ErrorCode returns the JSON error code for a revertal.
// See: https://github.com/ethereum/wiki/wiki/JSON-RPC-Error-Codes-Improvement-Proposal
func (e *revertError) ErrorCode() int {
return 3
}
// ErrorData returns the hex encoded revert reason.
func (e *revertError) ErrorData() interface{} {
return e.reason
}
func newRevertError(result *core.ExecutionResult) *revertError {
reason, errUnpack := abi.UnpackRevert(result.Revert())
err := errors.New("execution reverted")
if errUnpack == nil {
err = fmt.Errorf("execution reverted: %v", reason)
}
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return &revertError{
error: err,
reason: hexutil.Encode(result.Revert()),
}
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}
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// OverrideAccount indicates the overriding fields of account during the execution
// of a message call.
// Note, state and stateDiff can't be specified at the same time. If state is
// set, message execution will only use the data in the given state. Otherwise
// if statDiff is set, all diff will be applied first and then execute the call
// message.
type OverrideAccount struct {
Nonce *hexutil.Uint64 `json:"nonce"`
Code *hexutil.Bytes `json:"code"`
Balance **hexutil.Big `json:"balance"`
State *map[common.Hash]common.Hash `json:"state"`
StateDiff *map[common.Hash]common.Hash `json:"stateDiff"`
}
// StateOverride is the collection of overridden accounts.
type StateOverride map[common.Address]OverrideAccount
// Apply overrides the fields of specified accounts into the given state.
func (diff *StateOverride) Apply(state *ipld_eth_statedb.StateDB) error {
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if diff == nil {
return nil
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}
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for addr, account := range *diff {
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// Override account nonce.
if account.Nonce != nil {
state.SetNonce(addr, uint64(*account.Nonce))
}
// Override account(contract) code.
if account.Code != nil {
state.SetCode(addr, *account.Code)
}
// Override account balance.
if account.Balance != nil {
state.SetBalance(addr, (*big.Int)(*account.Balance))
}
if account.State != nil && account.StateDiff != nil {
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return fmt.Errorf("account %s has both 'state' and 'stateDiff'", addr.Hex())
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}
// Replace entire state if caller requires.
if account.State != nil {
state.SetStorage(addr, *account.State)
}
// Apply state diff into specified accounts.
if account.StateDiff != nil {
for key, value := range *account.StateDiff {
state.SetState(addr, key, value)
}
}
}
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return nil
}
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// Call executes the given transaction on the state for the given block number.
//
// Additionally, the caller can specify a batch of contract for fields overriding.
//
// Note, this function doesn't make and changes in the state/blockchain and is
// useful to execute and retrieve values.
func (pea *PublicEthAPI) Call(ctx context.Context, args CallArgs, blockNrOrHash rpc.BlockNumberOrHash, overrides *StateOverride) (hexutil.Bytes, error) {
if pea.config.ForwardEthCalls {
var hex hexutil.Bytes
err := pea.rpc.CallContext(ctx, &hex, "eth_call", args, blockNrOrHash, overrides)
return hex, err
}
result, err := DoCall(ctx, pea.B, args, blockNrOrHash, overrides, defaultEVMTimeout, pea.B.Config.RPCGasCap.Uint64())
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// If the result contains a revert reason, try to unpack and return it.
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if err == nil {
if len(result.Revert()) > 0 {
err = newRevertError(result)
} else if result.Err != nil {
err = result.Err
}
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}
if err != nil && pea.config.ProxyOnError {
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var hex hexutil.Bytes
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if err := pea.rpc.CallContext(ctx, &hex, "eth_call", args, blockNrOrHash, overrides); hex != nil && err == nil {
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return hex, nil
}
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}
if result != nil {
return result.Return(), err
} else {
return nil, err
}
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}
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func DoCall(ctx context.Context, b *Backend, args CallArgs, blockNrOrHash rpc.BlockNumberOrHash, overrides *StateOverride, timeout time.Duration, globalGasCap uint64) (*core.ExecutionResult, error) {
defer func(start time.Time) {
log.Debugxf(ctx, "Executing EVM call finished %s runtime %s", time.Now().String(), time.Since(start).String())
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}(time.Now())
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state, header, err := b.IPLDStateDBAndHeaderByNumberOrHash(ctx, blockNrOrHash)
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if state == nil || err != nil {
return nil, err
}
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if err := overrides.Apply(state); err != nil {
return nil, err
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}
// Setup context so it may be cancelled the call has completed
// or, in case of unmetered gas, setup a context with a timeout.
var cancel context.CancelFunc
if timeout > 0 {
ctx, cancel = context.WithTimeout(ctx, timeout)
} else {
ctx, cancel = context.WithCancel(ctx)
}
// Make sure the context is cancelled when the call has completed
// this makes sure resources are cleaned up.
defer cancel()
// Get a new instance of the EVM.
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msg, err := args.ToMessage(globalGasCap, header.BaseFee)
if err != nil {
return nil, err
}
evm, vmError, err := b.GetEVM(ctx, msg, state, header)
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if err != nil {
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return nil, err
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}
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// Wait for the context to be done and cancel the evm. Even if the
// EVM has finished, cancelling may be done (repeatedly)
go func() {
<-ctx.Done()
evm.Cancel()
}()
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// Execute the message.
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gp := new(core.GasPool).AddGas(math.MaxUint64)
result, err := core.ApplyMessage(evm, msg, gp)
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if err := vmError(); err != nil {
return nil, err
}
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// If the timer caused an abort, return an appropriate error message
if evm.Cancelled() {
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return nil, fmt.Errorf("execution aborted (timeout = %v)", timeout)
}
if err != nil {
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return result, fmt.Errorf("err: %w (supplied gas %d)", err, args.Gas)
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}
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return result, nil
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}
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// writeStateDiffAtOrFor calls out to the proxy statediffing geth client to fill in a gap in the index
func (pea *PublicEthAPI) writeStateDiffAtOrFor(blockNrOrHash rpc.BlockNumberOrHash) {
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// short circuit right away if the proxy doesn't support diffing
if !pea.config.SupportsStateDiff {
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return
}
if blockNr, ok := blockNrOrHash.Number(); ok {
pea.writeStateDiffAt(blockNr.Int64())
return
}
if hash, ok := blockNrOrHash.Hash(); ok {
pea.writeStateDiffFor(hash)
}
}
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// writeStateDiffWithCriteria calls out to the proxy statediffing geth client to fill in a gap in the index
func (pea *PublicEthAPI) writeStateDiffWithCriteria(crit filters.FilterCriteria) {
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// short circuit right away if the proxy doesn't support diffing
if !pea.config.SupportsStateDiff || crit.BlockHash == nil {
return
}
pea.writeStateDiffFor(*crit.BlockHash)
}
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// writeStateDiffAt calls out to the proxy statediffing geth client to fill in a gap in the index
func (pea *PublicEthAPI) writeStateDiffAt(height int64) {
if !pea.config.SupportsStateDiff {
return
}
// we use a separate context than the one provided by the client
ctx, cancel := context.WithTimeout(context.Background(), pea.config.StateDiffTimeout)
defer cancel()
var data json.RawMessage
params := statediff.Params{
IntermediateStateNodes: true,
IntermediateStorageNodes: true,
IncludeBlock: true,
IncludeReceipts: true,
IncludeTD: true,
IncludeCode: true,
}
log.Debugf("Calling statediff_writeStateDiffAt(%d)", height)
if err := pea.rpc.CallContext(ctx, &data, "statediff_writeStateDiffAt", uint64(height), params); err != nil {
log.Errorf("writeStateDiffAt %d failed with err %s", height, err.Error())
}
}
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// writeStateDiffFor calls out to the proxy statediffing geth client to fill in a gap in the index
func (pea *PublicEthAPI) writeStateDiffFor(blockHash common.Hash) {
if !pea.config.SupportsStateDiff {
return
}
// we use a separate context than the one provided by the client
ctx, cancel := context.WithTimeout(context.Background(), pea.config.StateDiffTimeout)
defer cancel()
var data json.RawMessage
params := statediff.Params{
IntermediateStateNodes: true,
IntermediateStorageNodes: true,
IncludeBlock: true,
IncludeReceipts: true,
IncludeTD: true,
IncludeCode: true,
}
log.Debugf("Calling statediff_writeStateDiffFor(%s)", blockHash.Hex())
if err := pea.rpc.CallContext(ctx, &data, "statediff_writeStateDiffFor", blockHash, params); err != nil {
log.Errorf("writeStateDiffFor %s failed with err %s", blockHash.Hex(), err.Error())
}
}
// rpcMarshalBlock uses the generalized output filler, then adds the total difficulty field
func (pea *PublicEthAPI) rpcMarshalBlock(b *types.Block, inclTx bool, fullTx bool) (map[string]interface{}, error) {
fields, err := RPCMarshalBlock(b, inclTx, fullTx)
if err != nil {
log.Errorf("error RPC marshalling block with hash %s: %s", b.Hash().String(), err)
return nil, err
}
if inclTx {
td, err := pea.B.GetTd(b.Hash())
if err != nil {
log.Errorf("error getting td for block with hash and number %s, %s: %s", b.Hash().String(), b.Number().String(), err)
return nil, err
}
fields["totalDifficulty"] = (*hexutil.Big)(td)
}
return fields, err
}
// rpcMarshalBlockWithUncleHashes uses the generalized output filler, then adds the total difficulty field
func (pea *PublicEthAPI) rpcMarshalBlockWithUncleHashes(b *types.Block, uncleHashes []common.Hash, inclTx bool, fullTx bool) (map[string]interface{}, error) {
fields, err := RPCMarshalBlockWithUncleHashes(b, uncleHashes, inclTx, fullTx)
if err != nil {
return nil, err
}
td, err := pea.B.GetTd(b.Hash())
if err != nil {
return nil, err
}
fields["totalDifficulty"] = (*hexutil.Big)(td)
return fields, err
}
// toHexSlice creates a slice of hex-strings based on []byte.
func toHexSlice(b [][]byte) []string {
r := make([]string, len(b))
for i := range b {
r[i] = hexutil.Encode(b[i])
}
return r
}
2021-09-01 07:02:28 +00:00
// decomposeLogs return logs from LogResult.
func decomposeLogs(logCIDs []LogResult) ([]*types.Log, error) {
logs := make([]*types.Log, len(logCIDs))
for i, l := range logCIDs {
topics := make([]common.Hash, 0)
if l.Topic0 != "" {
topics = append(topics, common.HexToHash(l.Topic0))
}
if l.Topic1 != "" {
topics = append(topics, common.HexToHash(l.Topic1))
}
if l.Topic2 != "" {
topics = append(topics, common.HexToHash(l.Topic2))
}
if l.Topic3 != "" {
topics = append(topics, common.HexToHash(l.Topic3))
}
// TODO: should we convert string to uint ?
blockNum, err := strconv.ParseUint(l.BlockNumber, 10, 64)
if err != nil {
return nil, err
}
logs[i] = &types.Log{
Address: common.HexToAddress(l.Address),
Topics: topics,
Data: l.Data,
BlockNumber: blockNum,
TxHash: common.HexToHash(l.TxHash),
TxIndex: uint(l.TxnIndex),
BlockHash: common.HexToHash(l.BlockHash),
Index: uint(l.Index),
}
}
return logs, nil
}