laconicd/x/feemarket/keeper/keeper.go

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package keeper
import (
"math/big"
"github.com/cosmos/cosmos-sdk/codec"
sdk "github.com/cosmos/cosmos-sdk/types"
paramtypes "github.com/cosmos/cosmos-sdk/x/params/types"
"github.com/tendermint/tendermint/libs/log"
"github.com/tharsis/ethermint/x/feemarket/types"
)
// Keeper grants access to the Fee Market module state.
type Keeper struct {
// Protobuf codec
cdc codec.BinaryCodec
// Store key required for the Fee Market Prefix KVStore.
storeKey sdk.StoreKey
// module specific parameter space that can be configured through governance
paramSpace paramtypes.Subspace
}
// NewKeeper generates new fee market module keeper
func NewKeeper(
cdc codec.BinaryCodec, storeKey sdk.StoreKey, paramSpace paramtypes.Subspace,
) Keeper {
// set KeyTable if it has not already been set
if !paramSpace.HasKeyTable() {
paramSpace = paramSpace.WithKeyTable(types.ParamKeyTable())
}
return Keeper{
cdc: cdc,
storeKey: storeKey,
paramSpace: paramSpace,
}
}
// Logger returns a module-specific logger.
func (k Keeper) Logger(ctx sdk.Context) log.Logger {
return ctx.Logger().With("module", types.ModuleName)
}
// ----------------------------------------------------------------------------
// Parent Block Gas Used
// Required by EIP1559 base fee calculation.
// ----------------------------------------------------------------------------
// GetBlockGasUsed returns the last block gas used value from the store.
func (k Keeper) GetBlockGasUsed(ctx sdk.Context) uint64 {
store := ctx.KVStore(k.storeKey)
bz := store.Get(types.KeyPrefixBlockGasUsed)
if len(bz) == 0 {
return 0
}
return sdk.BigEndianToUint64(bz)
}
// SetBlockGasUsed gets the block gas consumed to the store.
// CONTRACT: this should be only called during EndBlock.
func (k Keeper) SetBlockGasUsed(ctx sdk.Context, gas uint64) {
store := ctx.KVStore(k.storeKey)
gasBz := sdk.Uint64ToBigEndian(gas)
store.Set(types.KeyPrefixBlockGasUsed, gasBz)
}
// ----------------------------------------------------------------------------
// Parent Base Fee
// Required by EIP1559 base fee calculation.
// ----------------------------------------------------------------------------
// GetBlockGasUsed returns the last block gas used value from the store.
func (k Keeper) GetBaseFee(ctx sdk.Context) *big.Int {
store := ctx.KVStore(k.storeKey)
bz := store.Get(types.KeyPrefixBaseFee)
if len(bz) == 0 {
return nil
}
return new(big.Int).SetBytes(bz)
}
// SetBlockGasUsed gets the current block gas consumed to the store.
// CONTRACT: this should be only called during EndBlock.
func (k Keeper) SetBaseFee(ctx sdk.Context, baseFee *big.Int) {
store := ctx.KVStore(k.storeKey)
store.Set(types.KeyPrefixBaseFee, baseFee.Bytes())
}