contract

package
v0.5.4 Latest Latest
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 Go to latest Published: Aug 29, 2023 License: GPL-3.0, LGPL-3.0 Imports: 12 Imported by: 1

Documentation

Overview

Defines the interface for the configuration and execution of a precompile contract

Package contract is a generated GoMock package.

Index

Constants

View Source 
const (
	WriteGasCostPerSlot = 20_000
	ReadGasCostPerSlot  = 5_000
)

Gas costs for stateful precompiles

View Source 
const (
	SelectorLen = 4
)

Variables

This section is empty.

Functions

func CalculateFunctionSelector 

func CalculateFunctionSelector(functionSignature string) []byte

CalculateFunctionSelector returns the 4 byte function selector that results from [functionSignature] Ex. the function setBalance(addr address, balance uint256) should be passed in as the string: "setBalance(address,uint256)" TODO: remove this after moving to ABI based function selectors.

func DeductGas 

func DeductGas(suppliedGas uint64, requiredGas uint64) (uint64, error)

DeductGas checks if [suppliedGas] is sufficient against [requiredGas] and deducts [requiredGas] from [suppliedGas].

func PackOrderedHashes 

func PackOrderedHashes(dst []byte, hashes []common.Hash) error

PackOrderedHashes packs the ordered list of [hashes] into the [dst] byte buffer. assumes that [dst] has sufficient space to pack [hashes] or else this function will panic.

func PackOrderedHashesWithSelector 

func PackOrderedHashesWithSelector(dst []byte, functionSelector []byte, hashes []common.Hash) error

PackOrderedHashesWithSelector packs the function selector and ordered list of hashes into [dst] byte slice. assumes that [dst] has sufficient room for [functionSelector] and [hashes].

func PackedHash 

func PackedHash(packed []byte, index int) []byte

PackedHash returns packed the byte slice with common.HashLength from [packed] at the given [index]. Assumes that [packed] is composed entirely of packed 32 byte segments.

func ParseABI 

func ParseABI(rawABI string) abi.ABI

ParseABI parses the given ABI string and returns the parsed ABI. If the ABI is invalid, it panics.

Types

type AccessibleState 

type AccessibleState interface {
	GetStateDB() StateDB
	GetBlockContext() BlockContext
	GetSnowContext() *snow.Context
}

AccessibleState defines the interface exposed to stateful precompile contracts

type ActivationFunc added in v0.5.4 

type ActivationFunc func(AccessibleState) bool

ActivationFunc defines a function that is used to determine if a function is active The return value is whether or not the function is active

type BlockContext 

type BlockContext interface {
	Number() *big.Int
	Timestamp() uint64
}

BlockContext defines an interface that provides information to a stateful precompile about the current block. The BlockContext may be provided during both precompile activation and execution.

type Configurator 

type Configurator interface {
	MakeConfig() precompileconfig.Config
	Configure(
		chainConfig precompileconfig.ChainConfig,
		precompileconfig precompileconfig.Config,
		state StateDB,
		blockContext BlockContext,
	) error
}

type MockAccessibleState added in v0.5.4 

type MockAccessibleState struct {
	// contains filtered or unexported fields
}

MockAccessibleState is a mock of AccessibleState interface.

func NewMockAccessibleState 

func NewMockAccessibleState(ctrl *gomock.Controller) *MockAccessibleState

NewMockAccessibleState creates a new mock instance.

func (*MockAccessibleState) EXPECT added in v0.5.4 

func (m *MockAccessibleState) EXPECT() *MockAccessibleStateMockRecorder

EXPECT returns an object that allows the caller to indicate expected use.

func (*MockAccessibleState) GetBlockContext added in v0.5.4 

func (m *MockAccessibleState) GetBlockContext() BlockContext

GetBlockContext mocks base method.

func (*MockAccessibleState) GetSnowContext added in v0.5.4 

func (m *MockAccessibleState) GetSnowContext() *snow.Context

GetSnowContext mocks base method.

func (*MockAccessibleState) GetStateDB added in v0.5.4 

func (m *MockAccessibleState) GetStateDB() StateDB

GetStateDB mocks base method.

type MockAccessibleStateMockRecorder added in v0.5.4 

type MockAccessibleStateMockRecorder struct {
	// contains filtered or unexported fields
}

MockAccessibleStateMockRecorder is the mock recorder for MockAccessibleState.

func (*MockAccessibleStateMockRecorder) GetBlockContext added in v0.5.4 

func (mr *MockAccessibleStateMockRecorder) GetBlockContext() *gomock.Call

GetBlockContext indicates an expected call of GetBlockContext.

func (*MockAccessibleStateMockRecorder) GetSnowContext added in v0.5.4 

func (mr *MockAccessibleStateMockRecorder) GetSnowContext() *gomock.Call

GetSnowContext indicates an expected call of GetSnowContext.

func (*MockAccessibleStateMockRecorder) GetStateDB added in v0.5.4 

func (mr *MockAccessibleStateMockRecorder) GetStateDB() *gomock.Call

GetStateDB indicates an expected call of GetStateDB.

type MockBlockContext added in v0.5.4 

type MockBlockContext struct {
	// contains filtered or unexported fields
}

MockBlockContext is a mock of BlockContext interface.

func NewMockBlockContext 

func NewMockBlockContext(ctrl *gomock.Controller) *MockBlockContext

NewMockBlockContext creates a new mock instance.

func (*MockBlockContext) EXPECT added in v0.5.4 

func (m *MockBlockContext) EXPECT() *MockBlockContextMockRecorder

EXPECT returns an object that allows the caller to indicate expected use.

func (*MockBlockContext) GetPredicateResults added in v0.5.4 

func (m *MockBlockContext) GetPredicateResults(arg0 common.Hash, arg1 common.Address) []byte

GetPredicateResults mocks base method.

func (*MockBlockContext) Number added in v0.5.4 

func (m *MockBlockContext) Number() *big.Int

Number mocks base method.

func (*MockBlockContext) Timestamp added in v0.5.4 

func (m *MockBlockContext) Timestamp() uint64

Timestamp mocks base method.

type MockBlockContextMockRecorder added in v0.5.4 

type MockBlockContextMockRecorder struct {
	// contains filtered or unexported fields
}

MockBlockContextMockRecorder is the mock recorder for MockBlockContext.

func (*MockBlockContextMockRecorder) GetPredicateResults added in v0.5.4 

func (mr *MockBlockContextMockRecorder) GetPredicateResults(arg0, arg1 interface{}) *gomock.Call

GetPredicateResults indicates an expected call of GetPredicateResults.

func (*MockBlockContextMockRecorder) Number added in v0.5.4 

func (mr *MockBlockContextMockRecorder) Number() *gomock.Call

Number indicates an expected call of Number.

func (*MockBlockContextMockRecorder) Timestamp added in v0.5.4 

func (mr *MockBlockContextMockRecorder) Timestamp() *gomock.Call

Timestamp indicates an expected call of Timestamp.

type RunStatefulPrecompileFunc 

type RunStatefulPrecompileFunc func(accessibleState AccessibleState, caller common.Address, addr common.Address, input []byte, suppliedGas uint64, readOnly bool) (ret []byte, remainingGas uint64, err error)

type StateDB 

type StateDB interface {
	GetState(common.Address, common.Hash) common.Hash
	SetState(common.Address, common.Hash, common.Hash)

	SetNonce(common.Address, uint64)
	GetNonce(common.Address) uint64

	GetBalance(common.Address) *big.Int
	AddBalance(common.Address, *big.Int)

	CreateAccount(common.Address)
	Exist(common.Address) bool

	AddLog(addr common.Address, topics []common.Hash, data []byte, blockNumber uint64)
	GetLogData() [][]byte
	GetPredicateStorageSlots(address common.Address) ([]byte, bool)
	SetPredicateStorageSlots(address common.Address, predicate []byte)

	Suicide(common.Address) bool
	Finalise(deleteEmptyObjects bool)

	Snapshot() int
	RevertToSnapshot(int)
}

StateDB is the interface for accessing EVM state

type StatefulPrecompileFunction 

type StatefulPrecompileFunction struct {
	// contains filtered or unexported fields
}

StatefulPrecompileFunction defines a function implemented by a stateful precompile

func NewStatefulPrecompileFunction 

func NewStatefulPrecompileFunction(selector []byte, execute RunStatefulPrecompileFunc) *StatefulPrecompileFunction

NewStatefulPrecompileFunction creates a stateful precompile function with the given arguments

func NewStatefulPrecompileFunctionWithActivator added in v0.5.4 

func NewStatefulPrecompileFunctionWithActivator(selector []byte, execute RunStatefulPrecompileFunc, activation ActivationFunc) *StatefulPrecompileFunction

func (*StatefulPrecompileFunction) IsActivated added in v0.5.4 

func (f *StatefulPrecompileFunction) IsActivated(accessibleState AccessibleState) bool

type StatefulPrecompiledContract 

type StatefulPrecompiledContract interface {
	// Run executes the precompiled contract.
	Run(accessibleState AccessibleState, caller common.Address, addr common.Address, input []byte, suppliedGas uint64, readOnly bool) (ret []byte, remainingGas uint64, err error)
}

StatefulPrecompiledContract is the interface for executing a precompiled contract

func NewStatefulPrecompileContract 

func NewStatefulPrecompileContract(fallback RunStatefulPrecompileFunc, functions []*StatefulPrecompileFunction) (StatefulPrecompiledContract, error)

NewStatefulPrecompileContract generates new StatefulPrecompile using [functions] as the available functions and [fallback] as an optional fallback if there is no input data. Note: the selector of [fallback] will be ignored, so it is required to be left empty.

Source Files

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