keeper

package
v6.1.0 Latest Latest
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 Go to latest Published: Jul 30, 2024 License: Apache-2.0 Imports: 38 Imported by: 0

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Constants

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Variables

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Functions

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Types

type Keeper 

type Keeper struct {
	*evmkeeper.Keeper
	// contains filtered or unexported fields
}

func NewKeeper 

func NewKeeper(ek *evmkeeper.Keeper, ak fxevmtypes.AccountKeeper) *Keeper

func (*Keeper) ApplyContract 

func (k *Keeper) ApplyContract(ctx sdk.Context, from, contract common.Address, value *big.Int, abi abi.ABI, method string, constructorData ...interface{}) (*evmtypes.MsgEthereumTxResponse, error)

ApplyContract apply contract with args

func (*Keeper) ApplyMessage 

func (k *Keeper) ApplyMessage(ctx sdk.Context, msg core.Message, tracer vm.EVMLogger, commit bool) (*types.MsgEthereumTxResponse, error)

ApplyMessage calls ApplyMessageWithConfig with default EVMConfig

func (*Keeper) ApplyMessageWithConfig 

func (k *Keeper) ApplyMessageWithConfig(ctx sdk.Context,
	msg core.Message,
	tracer vm.EVMLogger,
	commit bool,
	cfg *statedb.EVMConfig,
	txConfig statedb.TxConfig,
) (*types.MsgEthereumTxResponse, error)

ApplyMessageWithConfig computes the new state by applying the given message against the existing state. If the message fails, the VM execution error with the reason will be returned to the client and the transaction won't be committed to the store.

Reverted state

The snapshot and rollback are supported by the `statedb.StateDB`.

Different Callers

It's called in three scenarios: 1. `ApplyTransaction`, in the transaction processing flow. 2. `EthCall/EthEstimateGas` grpc query handler. 3. Called by other native modules directly.

Prechecks and Preprocessing

All relevant state transition prechecks for the MsgEthereumTx are performed on the AnteHandler, prior to running the transaction against the state. The prechecks run are the following:

1. the nonce of the message caller is correct 2. caller has enough balance to cover transaction fee(gaslimit * gasprice) 3. the amount of gas required is available in the block 4. the purchased gas is enough to cover intrinsic usage 5. there is no overflow when calculating intrinsic gas 6. caller has enough balance to cover asset transfer for **topmost** call

The preprocessing steps performed by the AnteHandler are:

1. set up the initial access list (iff fork > Berlin)

Tracer parameter

It should be a `vm.Tracer` object or nil, if pass `nil`, it'll create a default one based on keeper options.

Commit parameter

If commit is true, the `StateDB` will be committed, otherwise discarded.

func (*Keeper) ApplyTransaction 

func (k *Keeper) ApplyTransaction(ctx sdk.Context, msgEth *types.MsgEthereumTx) (*types.MsgEthereumTxResponse, error)

ApplyTransaction runs and attempts to perform a state transition with the given transaction (i.e Message), that will only be persisted (committed) to the underlying KVStore if the transaction does not fail.

Gas tracking

Ethereum consumes gas according to the EVM opcodes instead of general reads and writes to store. Because of this, the state transition needs to ignore the SDK gas consumption mechanism defined by the GasKVStore and instead consume the amount of gas used by the VM execution. The amount of gas used is tracked by the EVM and returned in the execution result.

Prior to the execution, the starting tx gas meter is saved and replaced with an infinite gas meter in a new context in order to ignore the SDK gas consumption config values (read, write, has, delete). After the execution, the gas used from the message execution will be added to the starting gas consumed, taking into consideration the amount of gas returned. Finally, the context is updated with the EVM gas consumed value prior to returning.

For relevant discussion see: https://github.com/cosmos/cosmos-sdk/discussions/9072

func (*Keeper) CallContract 

func (k *Keeper) CallContract(goCtx context.Context, msg *fxevmtypes.MsgCallContract) (*fxevmtypes.MsgCallContractResponse, error)

func (*Keeper) CallEVMWithoutGas 

func (k *Keeper) CallEVMWithoutGas(
	ctx sdk.Context,
	from common.Address,
	contract *common.Address,
	value *big.Int,
	data []byte,
	commit bool,
) (*types.MsgEthereumTxResponse, error)

CallEVMWithoutGas performs a smart contract method call using contract data without gas

func (*Keeper) CreateContractWithCode 

func (k *Keeper) CreateContractWithCode(ctx sdk.Context, address common.Address, code []byte) error

CreateContractWithCode create contract account and set code

func (*Keeper) DeployContract 

func (k *Keeper) DeployContract(ctx sdk.Context, from common.Address, abi abi.ABI, bin []byte, constructorData ...interface{}) (common.Address, error)

DeployContract deploy contract with args

func (*Keeper) DeployUpgradableContract 

func (k *Keeper) DeployUpgradableContract(ctx sdk.Context, from, logic common.Address, logicData []byte, initializeAbi *abi.ABI, initializeArgs ...interface{}) (common.Address, error)

DeployUpgradableContract deploy upgrade contract and initialize it

func (*Keeper) EVMConfig 

func (k *Keeper) EVMConfig(ctx sdk.Context, proposerAddress sdk.ConsAddress, chainID *big.Int) (*statedb.EVMConfig, error)

EVMConfig creates the EVMConfig based on current state

func (*Keeper) EstimateGas 

func (k *Keeper) EstimateGas(c context.Context, req *types.EthCallRequest) (*types.EstimateGasResponse, error)

EstimateGas implements eth_estimateGas rpc api with enable hook flag.

func (*Keeper) EthCall 

func (k *Keeper) EthCall(c context.Context, req *types.EthCallRequest) (*types.MsgEthereumTxResponse, error)

EthCall implements eth_call rpc api.

func (*Keeper) EthereumTx 

func (k *Keeper) EthereumTx(goCtx context.Context, msg *types.MsgEthereumTx) (*types.MsgEthereumTxResponse, error)

EthereumTx implements the gRPC MsgServer interface. It receives a transaction which is then executed (i.e applied) against the go-ethereum EVM. The provided SDK Context is set to the Keeper so that it can implements and call the StateDB methods without receiving it as a function parameter.

func (*Keeper) InitGenesis 

func (k *Keeper) InitGenesis(ctx sdk.Context, accountKeeper types.AccountKeeper, data types.GenesisState) []abci.ValidatorUpdate

InitGenesis initializes genesis state based on exported genesis

func (*Keeper) QueryContract 

func (k *Keeper) QueryContract(ctx sdk.Context, from, contract common.Address, abi abi.ABI, method string, res interface{}, constructorData ...interface{}) error

QueryContract query contract with args and res

func (*Keeper) SetAccount 

func (k *Keeper) SetAccount(ctx sdk.Context, addr common.Address, account statedb.Account) error

SetAccount updates nonce/balance/codeHash together.

func (*Keeper) TraceBlock 

func (k *Keeper) TraceBlock(c context.Context, req *types.QueryTraceBlockRequest) (*types.QueryTraceBlockResponse, error)

TraceBlock configures a new tracer according to the provided configuration, and executes the given message in the provided environment for all the transactions in the queried block. The return value will be tracer dependent.

func (*Keeper) TraceTx 

func (k *Keeper) TraceTx(c context.Context, req *types.QueryTraceTxRequest) (*types.QueryTraceTxResponse, error)

TraceTx configures a new tracer according to the provided configuration, and executes the given message in the provided environment. The return value will be tracer dependent.

func (*Keeper) UpdateContractCode 

func (k *Keeper) UpdateContractCode(ctx sdk.Context, address common.Address, contractCode []byte) error

UpdateContractCode update contract code and code-hash

Source Files

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