5f1f252361
* evm: TxData as proto.Any * proto message * fix protobuf any generation * Int pointer * fix build and tests * ante tests * swagger * cleanup * c++
359 lines
10 KiB
Go
359 lines
10 KiB
Go
package backend
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import (
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"context"
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"fmt"
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"math/big"
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"regexp"
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"github.com/tharsis/ethermint/ethereum/rpc/types"
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"github.com/pkg/errors"
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tmtypes "github.com/tendermint/tendermint/types"
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log "github.com/xlab/suplog"
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"github.com/cosmos/cosmos-sdk/client"
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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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ethtypes "github.com/ethereum/go-ethereum/core/types"
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ethermint "github.com/tharsis/ethermint/types"
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evmtypes "github.com/tharsis/ethermint/x/evm/types"
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)
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// Backend implements the functionality needed to filter changes.
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// Implemented by EVMBackend.
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type Backend interface {
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// Used by block filter; also used for polling
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BlockNumber() (hexutil.Uint64, error)
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HeaderByNumber(blockNum types.BlockNumber) (*ethtypes.Header, error)
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HeaderByHash(blockHash common.Hash) (*ethtypes.Header, error)
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GetBlockByNumber(blockNum types.BlockNumber, fullTx bool) (map[string]interface{}, error)
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GetBlockByHash(hash common.Hash, fullTx bool) (map[string]interface{}, error)
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// returns the logs of a given block
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GetLogs(blockHash common.Hash) ([][]*ethtypes.Log, error)
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// Used by pending transaction filter
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PendingTransactions() ([]*types.RPCTransaction, error)
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// Used by log filter
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GetTransactionLogs(txHash common.Hash) ([]*ethtypes.Log, error)
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BloomStatus() (uint64, uint64)
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}
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var _ Backend = (*EVMBackend)(nil)
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// EVMBackend implements the Backend interface
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type EVMBackend struct {
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ctx context.Context
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clientCtx client.Context
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queryClient *types.QueryClient // gRPC query client
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logger log.Logger
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chainID *big.Int
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}
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// NewEVMBackend creates a new EVMBackend instance
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func NewEVMBackend(clientCtx client.Context) *EVMBackend {
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chainID, err := ethermint.ParseChainID(clientCtx.ChainID)
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if err != nil {
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panic(err)
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}
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return &EVMBackend{
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ctx: context.Background(),
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clientCtx: clientCtx,
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queryClient: types.NewQueryClient(clientCtx),
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logger: log.WithField("module", "evm-backend"),
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chainID: chainID,
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}
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}
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// BlockNumber returns the current block number.
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func (e *EVMBackend) BlockNumber() (hexutil.Uint64, error) {
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// NOTE: using 0 as min and max height returns the blockchain info up to the latest block.
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info, err := e.clientCtx.Client.BlockchainInfo(e.ctx, 0, 0)
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if err != nil {
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return hexutil.Uint64(0), err
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}
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return hexutil.Uint64(info.LastHeight), nil
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}
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// GetBlockByNumber returns the block identified by number.
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func (e *EVMBackend) GetBlockByNumber(blockNum types.BlockNumber, fullTx bool) (map[string]interface{}, error) {
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height := blockNum.Int64()
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currentBlockNumber, _ := e.BlockNumber()
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switch blockNum {
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case types.EthLatestBlockNumber:
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if currentBlockNumber > 0 {
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height = int64(currentBlockNumber - 1)
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}
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case types.EthPendingBlockNumber:
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if currentBlockNumber > 0 {
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height = int64(currentBlockNumber)
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}
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case types.EthEarliestBlockNumber:
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height = 1
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default:
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if blockNum < 0 {
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err := errors.Errorf("incorrect block height: %d", height)
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return nil, err
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} else if height > int64(currentBlockNumber) {
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return nil, nil
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}
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}
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resBlock, err := e.clientCtx.Client.Block(e.ctx, &height)
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if err != nil {
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// e.logger.Debugf("GetBlockByNumber safely bumping down from %d to latest", height)
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if resBlock, err = e.clientCtx.Client.Block(e.ctx, nil); err != nil {
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e.logger.Debugln("GetBlockByNumber failed to get latest block")
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return nil, nil
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}
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}
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res, err := e.EthBlockFromTendermint(e.clientCtx, e.queryClient, resBlock.Block, fullTx)
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if err != nil {
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e.logger.WithError(err).Debugf("EthBlockFromTendermint failed with block %s", resBlock.Block.String())
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}
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return res, err
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}
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// GetBlockByHash returns the block identified by hash.
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func (e *EVMBackend) GetBlockByHash(hash common.Hash, fullTx bool) (map[string]interface{}, error) {
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resBlock, err := e.clientCtx.Client.BlockByHash(e.ctx, hash.Bytes())
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if err != nil {
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e.logger.Warningf("BlockByHash failed for %s", hash.Hex())
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return nil, err
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}
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return e.EthBlockFromTendermint(e.clientCtx, e.queryClient, resBlock.Block, fullTx)
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}
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// EthBlockFromTendermint returns a JSON-RPC compatible Ethereum block from a given Tendermint block.
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func (e *EVMBackend) EthBlockFromTendermint(
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clientCtx client.Context,
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queryClient evmtypes.QueryClient,
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block *tmtypes.Block,
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fullTx bool,
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) (map[string]interface{}, error) {
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gasUsed := uint64(0)
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ethRPCTxs := []interface{}{}
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for i, txBz := range block.Txs {
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tx, gas := types.DecodeTx(e.clientCtx, txBz)
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gasUsed += gas
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msg, isEthTx := tx.(*evmtypes.MsgEthereumTx)
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if !isEthTx {
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// TODO: eventually support Cosmos txs in the block
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continue
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}
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hash := msg.AsTransaction().Hash()
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if !fullTx {
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ethRPCTxs = append(ethRPCTxs, hash)
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continue
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}
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// get full transaction from message data
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from, err := msg.GetSender(e.chainID)
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if err != nil {
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from = common.HexToAddress(msg.From)
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}
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txData, err := evmtypes.UnpackTxData(msg.Data)
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if err != nil {
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e.logger.WithError(err).Debugln("decoding failed")
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return nil, fmt.Errorf("failed to unpack tx data: %w", err)
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}
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ethTx, err := types.NewTransactionFromData(
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txData,
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from,
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hash,
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common.BytesToHash(block.Hash()),
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uint64(block.Height),
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uint64(i),
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)
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if err != nil {
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e.logger.WithError(err).Debugln("NewTransactionFromData for receipt failed", "hash", hash.Hex)
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continue
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}
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ethRPCTxs = append(ethRPCTxs, ethTx)
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}
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blockBloomResp, err := queryClient.BlockBloom(types.ContextWithHeight(block.Height), &evmtypes.QueryBlockBloomRequest{})
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if err != nil {
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e.logger.WithError(err).Debugln("failed to query BlockBloom", "height", block.Height)
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blockBloomResp = &evmtypes.QueryBlockBloomResponse{Bloom: ethtypes.Bloom{}.Bytes()}
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}
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bloom := ethtypes.BytesToBloom(blockBloomResp.Bloom)
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formattedBlock := types.FormatBlock(block.Header, block.Size(), ethermint.DefaultRPCGasLimit, new(big.Int).SetUint64(gasUsed), ethRPCTxs, bloom)
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e.logger.Infoln(formattedBlock)
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return formattedBlock, nil
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}
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// HeaderByNumber returns the block header identified by height.
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func (e *EVMBackend) HeaderByNumber(blockNum types.BlockNumber) (*ethtypes.Header, error) {
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height := blockNum.Int64()
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currentBlockNumber, _ := e.BlockNumber()
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switch blockNum {
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case types.EthLatestBlockNumber:
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if currentBlockNumber > 0 {
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height = int64(currentBlockNumber - 1)
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}
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case types.EthPendingBlockNumber:
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if currentBlockNumber > 0 {
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height = int64(currentBlockNumber)
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}
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case types.EthEarliestBlockNumber:
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height = 1
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default:
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if blockNum < 0 {
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err := errors.Errorf("incorrect block height: %d", height)
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return nil, err
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}
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}
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resBlock, err := e.clientCtx.Client.Block(e.ctx, &height)
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if err != nil {
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e.logger.Warningf("HeaderByNumber failed")
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return nil, err
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}
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req := &evmtypes.QueryBlockBloomRequest{}
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res, err := e.queryClient.BlockBloom(types.ContextWithHeight(resBlock.Block.Height), req)
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if err != nil {
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e.logger.Warningf("HeaderByNumber BlockBloom fail %d", resBlock.Block.Height)
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return nil, err
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}
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ethHeader := types.EthHeaderFromTendermint(resBlock.Block.Header)
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ethHeader.Bloom = ethtypes.BytesToBloom(res.Bloom)
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return ethHeader, nil
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}
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// HeaderByHash returns the block header identified by hash.
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func (e *EVMBackend) HeaderByHash(blockHash common.Hash) (*ethtypes.Header, error) {
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resBlock, err := e.clientCtx.Client.BlockByHash(e.ctx, blockHash.Bytes())
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if err != nil {
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e.logger.Warningf("HeaderByHash fail")
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return nil, err
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}
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req := &evmtypes.QueryBlockBloomRequest{}
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res, err := e.queryClient.BlockBloom(types.ContextWithHeight(resBlock.Block.Height), req)
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if err != nil {
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e.logger.Warningf("HeaderByHash BlockBloom fail %d", resBlock.Block.Height)
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return nil, err
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}
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ethHeader := types.EthHeaderFromTendermint(resBlock.Block.Header)
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ethHeader.Bloom = ethtypes.BytesToBloom(res.Bloom)
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return ethHeader, nil
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}
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// GetTransactionLogs returns the logs given a transaction hash.
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// It returns an error if there's an encoding error.
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// If no logs are found for the tx hash, the error is nil.
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func (e *EVMBackend) GetTransactionLogs(txHash common.Hash) ([]*ethtypes.Log, error) {
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req := &evmtypes.QueryTxLogsRequest{
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Hash: txHash.String(),
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}
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res, err := e.queryClient.TxLogs(e.ctx, req)
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if err != nil {
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e.logger.Warningf("TxLogs fail")
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return nil, err
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}
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return evmtypes.LogsToEthereum(res.Logs), nil
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}
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// PendingTransactions returns the transactions that are in the transaction pool
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// and have a from address that is one of the accounts this node manages.
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func (e *EVMBackend) PendingTransactions() ([]*types.RPCTransaction, error) {
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return []*types.RPCTransaction{}, nil
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}
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// GetLogs returns all the logs from all the ethereum transactions in a block.
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func (e *EVMBackend) GetLogs(blockHash common.Hash) ([][]*ethtypes.Log, error) {
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// NOTE: we query the state in case the tx result logs are not persisted after an upgrade.
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req := &evmtypes.QueryBlockLogsRequest{
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Hash: blockHash.String(),
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}
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res, err := e.queryClient.BlockLogs(e.ctx, req)
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if err != nil {
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e.logger.Warningf("BlockLogs fail")
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return nil, err
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}
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var blockLogs = [][]*ethtypes.Log{}
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for _, txLog := range res.TxLogs {
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blockLogs = append(blockLogs, txLog.EthLogs())
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}
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return blockLogs, nil
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}
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// This is very brittle, see: https://github.com/tendermint/tendermint/issues/4740
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var regexpMissingHeight = regexp.MustCompile(`height \d+ (must be less than or equal to|is not available)`)
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func (e *EVMBackend) GetLogsByNumber(blockNum types.BlockNumber) ([][]*ethtypes.Log, error) {
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height := blockNum.Int64()
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currentBlockNumber, _ := e.BlockNumber()
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switch blockNum {
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case types.EthLatestBlockNumber:
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if currentBlockNumber > 0 {
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height = int64(currentBlockNumber - 1)
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}
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case types.EthPendingBlockNumber:
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if currentBlockNumber > 0 {
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height = int64(currentBlockNumber)
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}
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case types.EthEarliestBlockNumber:
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height = 1
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default:
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if blockNum < 0 {
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err := errors.Errorf("incorrect block height: %d", height)
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return nil, err
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}
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}
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resBlock, err := e.clientCtx.Client.Block(e.ctx, &height)
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if err != nil {
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if regexpMissingHeight.MatchString(err.Error()) {
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return [][]*ethtypes.Log{}, nil
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}
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e.logger.Warningf("failed to query block at %d", height)
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return nil, err
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}
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return e.GetLogs(common.BytesToHash(resBlock.BlockID.Hash))
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}
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// BloomStatus returns the BloomBitsBlocks and the number of processed sections maintained
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// by the chain indexer.
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func (e *EVMBackend) BloomStatus() (uint64, uint64) {
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return 4096, 0
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}
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