laconicd-deprecated/rpc/types/utils.go
Federico Kunze 4501bbccdc
rpc, evm: refactor (#588)
* stargate: refactor

* remove evm CLI

* rpc: refactor

* more fixes

* fixes fixes fixes

* changelog

* refactor according to namespaces

* fix

* lint

* remove export logic

* fix rpc test

* godoc
2020-10-22 17:39:51 -03:00

192 lines
6.5 KiB
Go

package types
import (
"bytes"
"context"
"fmt"
"math/big"
tmbytes "github.com/tendermint/tendermint/libs/bytes"
tmtypes "github.com/tendermint/tendermint/types"
clientcontext "github.com/cosmos/cosmos-sdk/client/context"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
"github.com/cosmos/ethermint/crypto/ethsecp256k1"
evmtypes "github.com/cosmos/ethermint/x/evm/types"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
ethtypes "github.com/ethereum/go-ethereum/core/types"
)
// RawTxToEthTx returns a evm MsgEthereum transaction from raw tx bytes.
func RawTxToEthTx(clientCtx clientcontext.CLIContext, bz []byte) (*evmtypes.MsgEthereumTx, error) {
tx, err := evmtypes.TxDecoder(clientCtx.Codec)(bz)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error())
}
ethTx, ok := tx.(evmtypes.MsgEthereumTx)
if !ok {
return nil, fmt.Errorf("invalid transaction type %T, expected %T", tx, &evmtypes.MsgEthereumTx{})
}
return &ethTx, nil
}
// NewTransaction returns a transaction that will serialize to the RPC
// representation, with the given location metadata set (if available).
func NewTransaction(tx *evmtypes.MsgEthereumTx, txHash, blockHash common.Hash, blockNumber, index uint64) (*Transaction, error) {
// Verify signature and retrieve sender address
from, err := tx.VerifySig(tx.ChainID())
if err != nil {
return nil, err
}
rpcTx := &Transaction{
From: from,
Gas: hexutil.Uint64(tx.Data.GasLimit),
GasPrice: (*hexutil.Big)(tx.Data.Price),
Hash: txHash,
Input: hexutil.Bytes(tx.Data.Payload),
Nonce: hexutil.Uint64(tx.Data.AccountNonce),
To: tx.To(),
Value: (*hexutil.Big)(tx.Data.Amount),
V: (*hexutil.Big)(tx.Data.V),
R: (*hexutil.Big)(tx.Data.R),
S: (*hexutil.Big)(tx.Data.S),
}
if blockHash != (common.Hash{}) {
rpcTx.BlockHash = &blockHash
rpcTx.BlockNumber = (*hexutil.Big)(new(big.Int).SetUint64(blockNumber))
rpcTx.TransactionIndex = (*hexutil.Uint64)(&index)
}
return rpcTx, nil
}
// EthBlockFromTendermint returns a JSON-RPC compatible Ethereum blockfrom a given Tendermint block.
func EthBlockFromTendermint(clientCtx clientcontext.CLIContext, block *tmtypes.Block) (map[string]interface{}, error) {
gasLimit, err := BlockMaxGasFromConsensusParams(context.Background(), clientCtx)
if err != nil {
return nil, err
}
transactions, gasUsed, err := EthTransactionsFromTendermint(clientCtx, block.Txs)
if err != nil {
return nil, err
}
res, _, err := clientCtx.Query(fmt.Sprintf("custom/%s/%s/%d", evmtypes.ModuleName, evmtypes.QueryBloom, block.Height))
if err != nil {
return nil, err
}
var bloomRes evmtypes.QueryBloomFilter
clientCtx.Codec.MustUnmarshalJSON(res, &bloomRes)
bloom := bloomRes.Bloom
return formatBlock(block.Header, block.Size(), gasLimit, gasUsed, transactions, bloom), nil
}
// EthHeaderFromTendermint is an util function that returns an Ethereum Header
// from a tendermint Header.
func EthHeaderFromTendermint(header tmtypes.Header) *ethtypes.Header {
return &ethtypes.Header{
ParentHash: common.BytesToHash(header.LastBlockID.Hash.Bytes()),
UncleHash: common.Hash{},
Coinbase: common.Address{},
Root: common.BytesToHash(header.AppHash),
TxHash: common.BytesToHash(header.DataHash),
ReceiptHash: common.Hash{},
Difficulty: nil,
Number: big.NewInt(header.Height),
Time: uint64(header.Time.Unix()),
Extra: nil,
MixDigest: common.Hash{},
Nonce: ethtypes.BlockNonce{},
}
}
// EthTransactionsFromTendermint returns a slice of ethereum transaction hashes and the total gas usage from a set of
// tendermint block transactions.
func EthTransactionsFromTendermint(clientCtx clientcontext.CLIContext, txs []tmtypes.Tx) ([]common.Hash, *big.Int, error) {
transactionHashes := []common.Hash{}
gasUsed := big.NewInt(0)
for _, tx := range txs {
ethTx, err := RawTxToEthTx(clientCtx, tx)
if err != nil {
// continue to next transaction in case it's not a MsgEthereumTx
continue
}
// TODO: Remove gas usage calculation if saving gasUsed per block
gasUsed.Add(gasUsed, ethTx.Fee())
transactionHashes = append(transactionHashes, common.BytesToHash(tx.Hash()))
}
return transactionHashes, gasUsed, nil
}
// BlockMaxGasFromConsensusParams returns the gas limit for the latest block from the chain consensus params.
func BlockMaxGasFromConsensusParams(_ context.Context, clientCtx clientcontext.CLIContext) (int64, error) {
resConsParams, err := clientCtx.Client.ConsensusParams(nil)
if err != nil {
return 0, err
}
gasLimit := resConsParams.ConsensusParams.Block.MaxGas
if gasLimit == -1 {
// Sets gas limit to max uint32 to not error with javascript dev tooling
// This -1 value indicating no block gas limit is set to max uint64 with geth hexutils
// which errors certain javascript dev tooling which only supports up to 53 bits
gasLimit = int64(^uint32(0))
}
return gasLimit, nil
}
func formatBlock(
header tmtypes.Header, size int, gasLimit int64,
gasUsed *big.Int, transactions interface{}, bloom ethtypes.Bloom,
) map[string]interface{} {
if len(header.DataHash) == 0 {
header.DataHash = tmbytes.HexBytes(common.Hash{}.Bytes())
}
return map[string]interface{}{
"number": hexutil.Uint64(header.Height),
"hash": hexutil.Bytes(header.Hash()),
"parentHash": hexutil.Bytes(header.LastBlockID.Hash),
"nonce": hexutil.Uint64(0), // PoW specific
"sha3Uncles": common.Hash{}, // No uncles in Tendermint
"logsBloom": bloom,
"transactionsRoot": hexutil.Bytes(header.DataHash),
"stateRoot": hexutil.Bytes(header.AppHash),
"miner": common.Address{},
"mixHash": common.Hash{},
"difficulty": 0,
"totalDifficulty": 0,
"extraData": hexutil.Uint64(0),
"size": hexutil.Uint64(size),
"gasLimit": hexutil.Uint64(gasLimit), // Static gas limit
"gasUsed": (*hexutil.Big)(gasUsed),
"timestamp": hexutil.Uint64(header.Time.Unix()),
"transactions": transactions.([]common.Hash),
"uncles": []string{},
"receiptsRoot": common.Hash{},
}
}
// GetKeyByAddress returns the private key matching the given address. If not found it returns false.
func GetKeyByAddress(keys []ethsecp256k1.PrivKey, address common.Address) (key *ethsecp256k1.PrivKey, exist bool) {
for _, key := range keys {
if bytes.Equal(key.PubKey().Address().Bytes(), address.Bytes()) {
return &key, true
}
}
return nil, false
}