339 lines
11 KiB
Go
339 lines
11 KiB
Go
package keeper
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import (
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"math/big"
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"github.com/cosmos/cosmos-sdk/codec"
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"github.com/cosmos/cosmos-sdk/store/prefix"
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storetypes "github.com/cosmos/cosmos-sdk/store/types"
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sdk "github.com/cosmos/cosmos-sdk/types"
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sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
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paramtypes "github.com/cosmos/cosmos-sdk/x/params/types"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core"
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ethtypes "github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/params"
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"github.com/tendermint/tendermint/libs/log"
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ethermint "github.com/tharsis/ethermint/types"
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"github.com/tharsis/ethermint/x/evm/statedb"
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"github.com/tharsis/ethermint/x/evm/types"
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)
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// Keeper grants access to the EVM module state and implements the go-ethereum StateDB interface.
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type Keeper struct {
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// Protobuf codec
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cdc codec.BinaryCodec
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// Store key required for the EVM Prefix KVStore. It is required by:
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// - storing account's Storage State
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// - storing account's Code
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// - storing transaction Logs
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// - storing Bloom filters by block height. Needed for the Web3 API.
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storeKey storetypes.StoreKey
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// key to access the transient store, which is reset on every block during Commit
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transientKey storetypes.StoreKey
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// module specific parameter space that can be configured through governance
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paramSpace paramtypes.Subspace
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// access to account state
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accountKeeper types.AccountKeeper
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// update balance and accounting operations with coins
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bankKeeper types.BankKeeper
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// access historical headers for EVM state transition execution
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stakingKeeper types.StakingKeeper
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// fetch EIP1559 base fee and parameters
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feeMarketKeeper types.FeeMarketKeeper
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// chain ID number obtained from the context's chain id
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eip155ChainID *big.Int
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// Tracer used to collect execution traces from the EVM transaction execution
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tracer string
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// EVM Hooks for tx post-processing
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hooks types.EvmHooks
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}
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// NewKeeper generates new evm module keeper
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func NewKeeper(
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cdc codec.BinaryCodec,
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storeKey, transientKey storetypes.StoreKey, paramSpace paramtypes.Subspace,
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ak types.AccountKeeper, bankKeeper types.BankKeeper, sk types.StakingKeeper,
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fmk types.FeeMarketKeeper,
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tracer string,
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) *Keeper {
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// ensure evm module account is set
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if addr := ak.GetModuleAddress(types.ModuleName); addr == nil {
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panic("the EVM module account has not been set")
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}
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// set KeyTable if it has not already been set
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if !paramSpace.HasKeyTable() {
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paramSpace = paramSpace.WithKeyTable(types.ParamKeyTable())
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}
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// NOTE: we pass in the parameter space to the CommitStateDB in order to use custom denominations for the EVM operations
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return &Keeper{
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cdc: cdc,
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paramSpace: paramSpace,
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accountKeeper: ak,
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bankKeeper: bankKeeper,
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stakingKeeper: sk,
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feeMarketKeeper: fmk,
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storeKey: storeKey,
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transientKey: transientKey,
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tracer: tracer,
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}
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}
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// Logger returns a module-specific logger.
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func (k Keeper) Logger(ctx sdk.Context) log.Logger {
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return ctx.Logger().With("module", types.ModuleName)
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}
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// WithChainID sets the chain id to the local variable in the keeper
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func (k *Keeper) WithChainID(ctx sdk.Context) {
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chainID, err := ethermint.ParseChainID(ctx.ChainID())
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if err != nil {
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panic(err)
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}
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if k.eip155ChainID != nil && k.eip155ChainID.Cmp(chainID) != 0 {
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panic("chain id already set")
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}
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k.eip155ChainID = chainID
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}
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// ChainID returns the EIP155 chain ID for the EVM context
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func (k Keeper) ChainID() *big.Int {
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return k.eip155ChainID
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}
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// ----------------------------------------------------------------------------
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// Block Bloom
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// Required by Web3 API.
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// ----------------------------------------------------------------------------
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// EmitBlockBloomEvent emit block bloom events
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func (k Keeper) EmitBlockBloomEvent(ctx sdk.Context, bloom ethtypes.Bloom) {
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ctx.EventManager().EmitEvent(
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sdk.NewEvent(
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types.EventTypeBlockBloom,
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sdk.NewAttribute(types.AttributeKeyEthereumBloom, string(bloom.Bytes())),
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),
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)
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}
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// GetBlockBloomTransient returns bloom bytes for the current block height
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func (k Keeper) GetBlockBloomTransient(ctx sdk.Context) *big.Int {
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store := prefix.NewStore(ctx.TransientStore(k.transientKey), types.KeyPrefixTransientBloom)
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heightBz := sdk.Uint64ToBigEndian(uint64(ctx.BlockHeight()))
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bz := store.Get(heightBz)
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if len(bz) == 0 {
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return big.NewInt(0)
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}
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return new(big.Int).SetBytes(bz)
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}
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// SetBlockBloomTransient sets the given bloom bytes to the transient store. This value is reset on
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// every block.
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func (k Keeper) SetBlockBloomTransient(ctx sdk.Context, bloom *big.Int) {
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store := prefix.NewStore(ctx.TransientStore(k.transientKey), types.KeyPrefixTransientBloom)
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heightBz := sdk.Uint64ToBigEndian(uint64(ctx.BlockHeight()))
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store.Set(heightBz, bloom.Bytes())
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}
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// ----------------------------------------------------------------------------
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// Tx
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// ----------------------------------------------------------------------------
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// SetTxIndexTransient set the index of processing transaction
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func (k Keeper) SetTxIndexTransient(ctx sdk.Context, index uint64) {
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store := ctx.TransientStore(k.transientKey)
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store.Set(types.KeyPrefixTransientTxIndex, sdk.Uint64ToBigEndian(index))
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}
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// GetTxIndexTransient returns EVM transaction index on the current block.
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func (k Keeper) GetTxIndexTransient(ctx sdk.Context) uint64 {
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store := ctx.TransientStore(k.transientKey)
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bz := store.Get(types.KeyPrefixTransientTxIndex)
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if len(bz) == 0 {
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return 0
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}
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return sdk.BigEndianToUint64(bz)
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}
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// ----------------------------------------------------------------------------
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// Log
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// ----------------------------------------------------------------------------
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// GetLogSizeTransient returns EVM log index on the current block.
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func (k Keeper) GetLogSizeTransient(ctx sdk.Context) uint64 {
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store := ctx.TransientStore(k.transientKey)
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bz := store.Get(types.KeyPrefixTransientLogSize)
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if len(bz) == 0 {
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return 0
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}
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return sdk.BigEndianToUint64(bz)
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}
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// SetLogSizeTransient fetches the current EVM log index from the transient store, increases its
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// value by one and then sets the new index back to the transient store.
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func (k Keeper) SetLogSizeTransient(ctx sdk.Context, logSize uint64) {
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store := ctx.TransientStore(k.transientKey)
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store.Set(types.KeyPrefixTransientLogSize, sdk.Uint64ToBigEndian(logSize))
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}
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// ----------------------------------------------------------------------------
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// Storage
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// ----------------------------------------------------------------------------
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// GetAccountStorage return state storage associated with an account
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func (k Keeper) GetAccountStorage(ctx sdk.Context, address common.Address) types.Storage {
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storage := types.Storage{}
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k.ForEachStorage(ctx, address, func(key, value common.Hash) bool {
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storage = append(storage, types.NewState(key, value))
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return true
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})
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return storage
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}
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// ----------------------------------------------------------------------------
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// Account
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// ----------------------------------------------------------------------------
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// SetHooks sets the hooks for the EVM module
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// It should be called only once during initialization, it panic if called more than once.
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func (k *Keeper) SetHooks(eh types.EvmHooks) *Keeper {
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if k.hooks != nil {
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panic("cannot set evm hooks twice")
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}
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k.hooks = eh
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return k
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}
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// PostTxProcessing delegate the call to the hooks. If no hook has been registered, this function returns with a `nil` error
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func (k *Keeper) PostTxProcessing(ctx sdk.Context, from common.Address, to *common.Address, receipt *ethtypes.Receipt) error {
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if k.hooks == nil {
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return nil
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}
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return k.hooks.PostTxProcessing(ctx, from, to, receipt)
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}
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// Tracer return a default vm.Tracer based on current keeper state
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func (k Keeper) Tracer(ctx sdk.Context, msg core.Message, ethCfg *params.ChainConfig) vm.EVMLogger {
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return types.NewTracer(k.tracer, msg, ethCfg, ctx.BlockHeight())
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}
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// GetAccountWithoutBalance load nonce and codehash without balance,
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// more efficient in cases where balance is not needed.
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func (k *Keeper) GetAccountWithoutBalance(ctx sdk.Context, addr common.Address) *statedb.Account {
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cosmosAddr := sdk.AccAddress(addr.Bytes())
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acct := k.accountKeeper.GetAccount(ctx, cosmosAddr)
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if acct == nil {
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return nil
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}
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codeHash := types.EmptyCodeHash
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ethAcct, ok := acct.(ethermint.EthAccountI)
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if ok {
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codeHash = ethAcct.GetCodeHash().Bytes()
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}
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return &statedb.Account{
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Nonce: acct.GetSequence(),
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CodeHash: codeHash,
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}
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}
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// GetAccountOrEmpty returns empty account if not exist, returns error if it's not `EthAccount`
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func (k *Keeper) GetAccountOrEmpty(ctx sdk.Context, addr common.Address) statedb.Account {
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acct := k.GetAccount(ctx, addr)
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if acct != nil {
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return *acct
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}
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// empty account
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return statedb.Account{
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Balance: new(big.Int),
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CodeHash: types.EmptyCodeHash,
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}
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}
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// GetNonce returns the sequence number of an account, returns 0 if not exists.
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func (k *Keeper) GetNonce(ctx sdk.Context, addr common.Address) uint64 {
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cosmosAddr := sdk.AccAddress(addr.Bytes())
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acct := k.accountKeeper.GetAccount(ctx, cosmosAddr)
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if acct == nil {
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return 0
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}
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return acct.GetSequence()
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}
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// GetBalance load account's balance of gas token
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func (k *Keeper) GetBalance(ctx sdk.Context, addr common.Address) *big.Int {
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cosmosAddr := sdk.AccAddress(addr.Bytes())
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params := k.GetParams(ctx)
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coin := k.bankKeeper.GetBalance(ctx, cosmosAddr, params.EvmDenom)
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return coin.Amount.BigInt()
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}
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// BaseFee returns current base fee, return values:
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// - `nil`: london hardfork not enabled.
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// - `0`: london hardfork enabled but feemarket is not enabled.
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// - `n`: both london hardfork and feemarket are enabled.
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func (k Keeper) BaseFee(ctx sdk.Context, ethCfg *params.ChainConfig) *big.Int {
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if !types.IsLondon(ethCfg, ctx.BlockHeight()) {
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return nil
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}
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baseFee := k.feeMarketKeeper.GetBaseFee(ctx)
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if baseFee == nil {
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// return 0 if feemarket not enabled.
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baseFee = big.NewInt(0)
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}
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return baseFee
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}
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// ResetTransientGasUsed reset gas used to prepare for execution of current cosmos tx, called in ante handler.
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func (k Keeper) ResetTransientGasUsed(ctx sdk.Context) {
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store := ctx.TransientStore(k.transientKey)
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store.Delete(types.KeyPrefixTransientGasUsed)
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}
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// GetTransientGasUsed returns the gas used by current cosmos tx.
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func (k Keeper) GetTransientGasUsed(ctx sdk.Context) uint64 {
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store := ctx.TransientStore(k.transientKey)
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bz := store.Get(types.KeyPrefixTransientGasUsed)
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if len(bz) == 0 {
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return 0
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}
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return sdk.BigEndianToUint64(bz)
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}
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// SetTransientGasUsed sets the gas used by current cosmos tx.
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func (k Keeper) SetTransientGasUsed(ctx sdk.Context, gasUsed uint64) {
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store := ctx.TransientStore(k.transientKey)
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bz := sdk.Uint64ToBigEndian(gasUsed)
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store.Set(types.KeyPrefixTransientGasUsed, bz)
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}
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// AddTransientGasUsed accumulate gas used by each eth msgs included in current cosmos tx.
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func (k Keeper) AddTransientGasUsed(ctx sdk.Context, gasUsed uint64) (uint64, error) {
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result := k.GetTransientGasUsed(ctx) + gasUsed
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if result < gasUsed {
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return 0, sdkerrors.Wrap(types.ErrGasOverflow, "transient gas used")
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}
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k.SetTransientGasUsed(ctx, result)
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return result, nil
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}
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