laconicd/x/evm/keeper/abci.go

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package keeper
import (
"math/big"
"time"
"github.com/ethereum/go-ethereum/common"
ethtypes "github.com/ethereum/go-ethereum/core/types"
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abci "github.com/tendermint/tendermint/abci/types"
"github.com/cosmos/cosmos-sdk/telemetry"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/ethermint/x/evm/types"
)
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// BeginBlock sets the block hash -> block height map for the previous block height
// and resets the Bloom filter and the transaction count to 0.
func (k *Keeper) BeginBlock(ctx sdk.Context, req abci.RequestBeginBlock) {
defer telemetry.ModuleMeasureSince(types.ModuleName, time.Now(), telemetry.MetricKeyBeginBlocker)
k.WithContext(ctx)
k.headerHash = common.BytesToHash(req.Hash)
}
// EndBlock updates the accounts and commits state objects to the KV Store, while
// deleting the empty ones. It also sets the bloom filers for the request block to
// the store. The EVM end block logic doesn't update the validator set, thus it returns
// an empty slice.
func (k Keeper) EndBlock(ctx sdk.Context, req abci.RequestEndBlock) []abci.ValidatorUpdate {
defer telemetry.ModuleMeasureSince(types.ModuleName, time.Now(), telemetry.MetricKeyEndBlocker)
// Gas costs are handled within msg handler so costs should be ignored
ctx = ctx.WithGasMeter(sdk.NewInfiniteGasMeter())
k.CommitStateDB.WithContext(ctx)
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k.WithContext(ctx)
// Update account balances before committing other parts of state
k.CommitStateDB.UpdateAccounts()
root, err := k.CommitStateDB.Commit(true)
// Commit state objects to KV store
if err != nil {
k.Logger(ctx).Error("failed to commit state objects", "error", err, "height", ctx.BlockHeight())
panic(err)
}
// reset all cache after account data has been committed, that make sure node state consistent
if err = k.CommitStateDB.Reset(root); err != nil {
panic(err)
}
// get the block bloom bytes from the transient store and set it to the persistent storage
bloomBig, found := k.GetBlockBloomTransient()
if !found {
bloomBig = big.NewInt(0)
}
bloom := ethtypes.BytesToBloom(bloomBig.Bytes())
k.SetBlockBloom(ctx, req.Height, bloom)
return []abci.ValidatorUpdate{}
}