laconicd/x/evm/keeper/keeper.go

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package keeper
import (
"bytes"
"math/big"
"github.com/cosmos/cosmos-sdk/codec"
"github.com/cosmos/cosmos-sdk/store/prefix"
sdk "github.com/cosmos/cosmos-sdk/types"
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paramtypes "github.com/cosmos/cosmos-sdk/x/params/types"
"github.com/ethereum/go-ethereum/common"
ethtypes "github.com/ethereum/go-ethereum/core/types"
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"github.com/tendermint/tendermint/libs/log"
"github.com/cosmos/ethermint/x/evm/types"
)
// Keeper wraps the CommitStateDB, allowing us to pass in SDK context while adhering
// to the StateDB interface.
type Keeper struct {
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// Protobuf codec
cdc codec.BinaryMarshaler
// 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.
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// - storing block hash -> block height map. Needed for the Web3 API. TODO: remove
storeKey sdk.StoreKey
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// key to access the transient store, which is reset on every block during Commit
transientKey sdk.StoreKey
paramSpace paramtypes.Subspace
accountKeeper types.AccountKeeper
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bankKeeper types.BankKeeper
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ctx sdk.Context
// Ethermint concrete implementation on the EVM StateDB interface
CommitStateDB *types.CommitStateDB
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// Per-transaction access list
// See EIP-2930 for more info: https://eips.ethereum.org/EIPS/eip-2930
// TODO: (@fedekunze) for how long should we persist the entries in the access list?
// same block (i.e Transient Store)? 2 or more (KVStore with module Parameter which resets the state after that window)?
accessList *types.AccessListMappings
}
// NewKeeper generates new evm module keeper
func NewKeeper(
cdc codec.BinaryMarshaler, storeKey, transientKey sdk.StoreKey, paramSpace paramtypes.Subspace,
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ak types.AccountKeeper, bankKeeper types.BankKeeper,
) *Keeper {
// set KeyTable if it has not already been set
if !paramSpace.HasKeyTable() {
paramSpace = paramSpace.WithKeyTable(types.ParamKeyTable())
}
// NOTE: we pass in the parameter space to the CommitStateDB in order to use custom denominations for the EVM operations
return &Keeper{
cdc: cdc,
paramSpace: paramSpace,
accountKeeper: ak,
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bankKeeper: bankKeeper,
storeKey: storeKey,
transientKey: transientKey,
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CommitStateDB: types.NewCommitStateDB(sdk.Context{}, storeKey, paramSpace, ak, bankKeeper),
accessList: types.NewAccessListMappings(),
}
}
// Logger returns a module-specific logger.
func (k Keeper) Logger(ctx sdk.Context) log.Logger {
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return ctx.Logger().With("module", types.ModuleName)
}
// WithContext sets an updated SDK context to the keeper
func (k *Keeper) WithContext(ctx sdk.Context) {
k.ctx = ctx
}
// ----------------------------------------------------------------------------
// Block Bloom
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// Required by Web3 API.
// ----------------------------------------------------------------------------
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// GetBlockBloom gets bloombits from block height
func (k Keeper) GetBlockBloom(ctx sdk.Context, height int64) (ethtypes.Bloom, bool) {
store := ctx.KVStore(k.storeKey)
bz := store.Get(types.BloomKey(height))
if len(bz) == 0 {
return ethtypes.Bloom{}, false
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}
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 := ctx.KVStore(k.storeKey)
key := types.BloomKey(height)
store.Set(key, bloom.Bytes())
}
// GetBlockBloomTransient returns bloom bytes for the current block height
func (k Keeper) GetBlockBloomTransient() (*big.Int, bool) {
store := k.ctx.TransientStore(k.transientKey)
bz := store.Get(types.KeyPrefixTransientBloom)
if len(bz) == 0 {
return nil, false
}
return new(big.Int).SetBytes(bz), true
}
// SetBlockBloomTransient sets the given bloom bytes to the transient store. This value is reset on
// every block.
func (k Keeper) SetBlockBloomTransient(bloom *big.Int) {
store := k.ctx.TransientStore(k.transientKey)
store.Set(types.KeyPrefixTransientBloom, bloom.Bytes())
}
// ----------------------------------------------------------------------------
// Block
// ----------------------------------------------------------------------------
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// GetBlockHash gets block height from block consensus hash
func (k Keeper) GetBlockHashFromHeight(ctx sdk.Context, height int64) (common.Hash, bool) {
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store := ctx.KVStore(k.storeKey)
bz := store.Get(types.KeyBlockHeightHash(uint64(height)))
if len(bz) == 0 {
return common.Hash{}, false
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}
return common.BytesToHash(bz), true
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}
// SetBlockHash sets the mapping from block consensus hash to block height
func (k Keeper) SetBlockHash(ctx sdk.Context, hash []byte, height int64) {
store := ctx.KVStore(k.storeKey)
bz := sdk.Uint64ToBigEndian(uint64(height))
store.Set(types.KeyBlockHash(common.BytesToHash(hash)), bz)
}
// GetBlockHash gets block height from block consensus hash
func (k Keeper) GetBlockHeightByHash(ctx sdk.Context, hash common.Hash) (int64, bool) {
store := ctx.KVStore(k.storeKey)
bz := store.Get(types.KeyBlockHash(hash))
if len(bz) == 0 {
return 0, false
}
height := sdk.BigEndianToUint64(bz)
return int64(height), true
}
// SetBlockHash sets the mapping from block consensus hash to block height
func (k Keeper) SetBlockHeightToHash(ctx sdk.Context, hash common.Hash, height int64) {
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store := ctx.KVStore(k.storeKey)
store.Set(types.KeyBlockHeightHash(uint64(height)), hash.Bytes())
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}
// SetTxReceiptToHash sets the mapping from tx hash to tx receipt
func (k Keeper) SetTxReceiptToHash(ctx sdk.Context, hash common.Hash, receipt *types.TxReceipt) {
ctx = ctx.WithGasMeter(sdk.NewInfiniteGasMeter())
data := k.cdc.MustMarshalBinaryBare(receipt)
store := ctx.KVStore(k.storeKey)
store.Set(types.KeyHashTxReceipt(hash), data)
}
// GetHeightHash returns the block header hash associated with a given block height and chain epoch number.
func (k Keeper) GetHeightHash(ctx sdk.Context, height uint64) common.Hash {
return k.CommitStateDB.WithContext(ctx).GetHeightHash(height)
}
// SetHeightHash sets the block header hash associated with a given height.
func (k Keeper) SetHeightHash(ctx sdk.Context, height uint64, hash common.Hash) {
k.CommitStateDB.WithContext(ctx).SetHeightHash(height, hash)
}
// ----------------------------------------------------------------------------
// Tx
// ----------------------------------------------------------------------------
// GetTxIndexTransient returns EVM transaction index on the current block.
func (k Keeper) GetTxIndexTransient() uint64 {
store := k.ctx.TransientStore(k.transientKey)
bz := store.Get(types.KeyPrefixTransientBloom)
if len(bz) == 0 {
return 0
}
return sdk.BigEndianToUint64(bz)
}
// IncreaseTxIndexTransient fetches the current EVM tx index from the transient store, increases its
// value by one and then sets the new index back to the transient store.
func (k Keeper) IncreaseTxIndexTransient() {
txIndex := k.GetTxIndexTransient()
store := k.ctx.TransientStore(k.transientKey)
store.Set(types.KeyPrefixTransientBloom, sdk.Uint64ToBigEndian(txIndex+1))
}
// ResetRefundTransient resets the refund gas value.
func (k Keeper) ResetRefundTransient(ctx sdk.Context) {
store := ctx.TransientStore(k.transientKey)
store.Delete(types.KeyPrefixTransientRefund)
}
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// GetTxReceiptFromHash gets tx receipt by tx hash.
func (k Keeper) GetTxReceiptFromHash(ctx sdk.Context, hash common.Hash) (*types.TxReceipt, bool) {
store := ctx.KVStore(k.storeKey)
data := store.Get(types.KeyHashTxReceipt(hash))
if len(data) == 0 {
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return nil, false
}
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var receipt types.TxReceipt
k.cdc.MustUnmarshalBinaryBare(data, &receipt)
return &receipt, true
}
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// AddTxHashToBlock stores tx hash in the list of tx for the block.
func (k Keeper) AddTxHashToBlock(ctx sdk.Context, blockHeight int64, txHash common.Hash) {
key := types.KeyBlockHeightTxs(uint64(blockHeight))
list := types.BytesList{}
store := ctx.KVStore(k.storeKey)
data := store.Get(key)
if len(data) > 0 {
k.cdc.MustUnmarshalBinaryBare(data, &list)
}
list.Bytes = append(list.Bytes, txHash.Bytes())
data = k.cdc.MustMarshalBinaryBare(&list)
store.Set(key, data)
}
// GetTxsFromBlock returns list of tx hash in the block by height.
func (k Keeper) GetTxsFromBlock(ctx sdk.Context, blockHeight int64) []common.Hash {
key := types.KeyBlockHeightTxs(uint64(blockHeight))
store := ctx.KVStore(k.storeKey)
data := store.Get(key)
if len(data) > 0 {
list := types.BytesList{}
k.cdc.MustUnmarshalBinaryBare(data, &list)
txs := make([]common.Hash, 0, len(list.Bytes))
for _, b := range list.Bytes {
txs = append(txs, common.BytesToHash(b))
}
return txs
}
return nil
}
// GetTxReceiptsByBlockHeight gets tx receipts by block height.
func (k Keeper) GetTxReceiptsByBlockHeight(ctx sdk.Context, blockHeight int64) []*types.TxReceipt {
txs := k.GetTxsFromBlock(ctx, blockHeight)
if len(txs) == 0 {
return nil
}
store := ctx.KVStore(k.storeKey)
receipts := make([]*types.TxReceipt, 0, len(txs))
for idx, txHash := range txs {
data := store.Get(types.KeyHashTxReceipt(txHash))
if len(data) == 0 {
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continue
}
var receipt types.TxReceipt
k.cdc.MustUnmarshalBinaryBare(data, &receipt)
receipt.Index = uint64(idx)
receipts = append(receipts, &receipt)
}
return receipts
}
// GetTxReceiptsByBlockHash gets tx receipts by block hash.
func (k Keeper) GetTxReceiptsByBlockHash(ctx sdk.Context, hash common.Hash) []*types.TxReceipt {
blockHeight, ok := k.GetBlockHeightByHash(ctx, hash)
if !ok {
return nil
}
return k.GetTxReceiptsByBlockHeight(ctx, blockHeight)
}
// ----------------------------------------------------------------------------
// Log
// ----------------------------------------------------------------------------
// 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() {
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var txLog types.TransactionLogs
k.cdc.MustUnmarshalBinaryBare(iterator.Value(), &txLog)
// add a new entry
txsLogs = append(txsLogs, txLog)
}
return txsLogs
}
// GetLogs returns the current logs for a given transaction hash from the KVStore.
// This function returns an empty, non-nil slice if no logs are found.
func (k Keeper) GetTxLogs(txHash common.Hash) []*ethtypes.Log {
store := prefix.NewStore(k.ctx.KVStore(k.storeKey), types.KeyPrefixLogs)
bz := store.Get(txHash.Bytes())
if len(bz) == 0 {
return []*ethtypes.Log{}
}
var logs types.TransactionLogs
k.cdc.MustUnmarshalBinaryBare(bz, &logs)
return logs.EthLogs()
}
// SetLogs sets the logs for a transaction in the KVStore.
func (k Keeper) SetLogs(txHash common.Hash, logs []*ethtypes.Log) {
store := prefix.NewStore(k.ctx.KVStore(k.storeKey), types.KeyPrefixLogs)
txLogs := types.NewTransactionLogsFromEth(txHash, logs)
bz := k.cdc.MustMarshalBinaryBare(&txLogs)
store.Set(txHash.Bytes(), bz)
}
// DeleteLogs removes the logs from the KVStore. It is used during journal.Revert.
func (k Keeper) DeleteTxLogs(ctx sdk.Context, txHash common.Hash) {
store := prefix.NewStore(ctx.KVStore(k.storeKey), types.KeyPrefixLogs)
store.Delete(txHash.Bytes())
}
// ----------------------------------------------------------------------------
// Storage
// ----------------------------------------------------------------------------
// GetAccountStorage return state storage associated with an account
func (k Keeper) GetAccountStorage(ctx sdk.Context, address common.Address) (types.Storage, error) {
storage := types.Storage{}
err := k.ForEachStorage(address, func(key, value common.Hash) bool {
storage = append(storage, types.NewState(key, value))
return false
})
if err != nil {
return types.Storage{}, err
}
return storage, nil
}
// ----------------------------------------------------------------------------
// Account
// ----------------------------------------------------------------------------
func (k Keeper) DeleteState(addr common.Address, key common.Hash) {
store := prefix.NewStore(k.ctx.KVStore(k.storeKey), types.AddressStoragePrefix(addr))
key = types.KeyAddressStorage(addr, key)
store.Delete(key.Bytes())
}
// DeleteAccountStorage clears all the storage state associated with the given address.
func (k Keeper) DeleteAccountStorage(addr common.Address) {
_ = k.ForEachStorage(addr, func(key, _ common.Hash) bool {
k.DeleteState(addr, key)
return false
})
}
// DeleteCode removes the contract code byte array from the store associated with
// the given address.
func (k Keeper) DeleteCode(addr common.Address) {
hash := k.GetCodeHash(addr)
if bytes.Equal(hash.Bytes(), common.BytesToHash(types.EmptyCodeHash).Bytes()) {
return
}
store := prefix.NewStore(k.ctx.KVStore(k.storeKey), types.KeyPrefixCode)
store.Delete(hash.Bytes())
}
// ClearBalance subtracts the EVM all the balance denomination from the address
// balance while also updating the total supply.
func (k Keeper) ClearBalance(addr sdk.AccAddress) (prevBalance sdk.Coin, err error) {
params := k.GetParams(k.ctx)
prevBalance = k.bankKeeper.GetBalance(k.ctx, addr, params.EvmDenom)
if prevBalance.IsPositive() {
err := k.bankKeeper.SubtractCoins(k.ctx, addr, sdk.Coins{prevBalance})
if err != nil {
return sdk.Coin{}, err
}
}
return prevBalance, nil
}
// ResetAccount removes the code, storage state and evm denom balance coins stored
// with the given address.
func (k Keeper) ResetAccount(addr common.Address) {
k.DeleteCode(addr)
k.DeleteAccountStorage(addr)
_, err := k.ClearBalance(addr.Bytes())
if err != nil {
k.Logger(k.ctx).Error(
"failed to clear balance during account reset",
"ethereum-address", addr.Hex(),
)
}
}