laconicd/x/evm/keeper/keeper.go
Federico Kunze 427e96c1de
evm: various fixes (#319)
* evm: use prefix stores, move SetBlockBloom to EndBlock, bug fixes

* add logs to genesis state

* log tests

* commit and finalize on InitGenesis

* validate TransactionLogs

* changelog

* fix test-import

* fix lint

* add more tests
2020-06-04 06:40:21 -04:00

123 lines
4.0 KiB
Go

package keeper
import (
"encoding/binary"
"fmt"
"math/big"
"github.com/tendermint/tendermint/libs/log"
"github.com/cosmos/cosmos-sdk/codec"
"github.com/cosmos/cosmos-sdk/store/prefix"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/ethermint/x/evm/types"
ethcmn "github.com/ethereum/go-ethereum/common"
ethtypes "github.com/ethereum/go-ethereum/core/types"
)
// Keeper wraps the CommitStateDB, allowing us to pass in SDK context while adhering
// to the StateDB interface.
type Keeper struct {
// Amino codec
cdc *codec.Codec
// Store key required for the EVM Prefix KVStore. It is required by:
// - storing Account's Storage State
// - storing Account's Code
// - storing transaction Logs
// - storing block height -> bloom filter map. Needed for the Web3 API.
// - storing block hash -> block height map. Needed for the Web3 API.
storeKey sdk.StoreKey
CommitStateDB *types.CommitStateDB
// Transaction counter in a block. Used on StateSB's Prepare function.
// It is reset to 0 every block on BeginBlock so there's no point in storing the counter
// on the KVStore or adding it as a field on the EVM genesis state.
TxCount int
Bloom *big.Int
}
// NewKeeper generates new evm module keeper
func NewKeeper(
cdc *codec.Codec, storeKey sdk.StoreKey, ak types.AccountKeeper, bk types.BankKeeper,
) Keeper {
return Keeper{
cdc: cdc,
storeKey: storeKey,
CommitStateDB: types.NewCommitStateDB(sdk.Context{}, storeKey, ak, bk),
TxCount: 0,
Bloom: big.NewInt(0),
}
}
// Logger returns a module-specific logger.
func (k Keeper) Logger(ctx sdk.Context) log.Logger {
return ctx.Logger().With("module", fmt.Sprintf("x/%s", types.ModuleName))
}
// ----------------------------------------------------------------------------
// Block hash mapping functions
// Required by Web3 API.
// TODO: remove once tendermint support block queries by hash.
// ----------------------------------------------------------------------------
// GetBlockHash gets block height from block consensus hash
func (k Keeper) GetBlockHash(ctx sdk.Context, hash []byte) (int64, bool) {
store := prefix.NewStore(ctx.KVStore(k.storeKey), types.KeyPrefixBlockHash)
bz := store.Get(hash)
if len(bz) == 0 {
return 0, false
}
height := binary.BigEndian.Uint64(bz)
return int64(height), true
}
// SetBlockHash sets the mapping from block consensus hash to block height
func (k Keeper) SetBlockHash(ctx sdk.Context, hash []byte, height int64) {
store := prefix.NewStore(ctx.KVStore(k.storeKey), types.KeyPrefixBlockHash)
bz := sdk.Uint64ToBigEndian(uint64(height))
store.Set(hash, bz)
}
// ----------------------------------------------------------------------------
// Block bloom bits mapping functions
// Required by Web3 API.
// ----------------------------------------------------------------------------
// GetBlockBloom gets bloombits from block height
func (k Keeper) GetBlockBloom(ctx sdk.Context, height int64) (ethtypes.Bloom, bool) {
store := prefix.NewStore(ctx.KVStore(k.storeKey), types.KeyPrefixBloom)
bz := store.Get(types.BloomKey(height))
if len(bz) == 0 {
return ethtypes.Bloom{}, false
}
return ethtypes.BytesToBloom(bz), true
}
// SetBlockBloom sets the mapping from block height to bloom bits
func (k Keeper) SetBlockBloom(ctx sdk.Context, height int64, bloom ethtypes.Bloom) {
store := prefix.NewStore(ctx.KVStore(k.storeKey), types.KeyPrefixBloom)
store.Set(types.BloomKey(height), bloom.Bytes())
}
// GetAllTxLogs return all the transaction logs from the store.
func (k Keeper) GetAllTxLogs(ctx sdk.Context) []types.TransactionLogs {
store := ctx.KVStore(k.storeKey)
iterator := sdk.KVStorePrefixIterator(store, types.KeyPrefixLogs)
defer iterator.Close()
txsLogs := []types.TransactionLogs{}
for ; iterator.Valid(); iterator.Next() {
hash := ethcmn.BytesToHash(iterator.Key())
var logs []*ethtypes.Log
k.cdc.MustUnmarshalBinaryLengthPrefixed(iterator.Value(), &logs)
// add a new entry
txLog := types.NewTransactionLogs(hash, logs)
txsLogs = append(txsLogs, txLog)
}
return txsLogs
}