hvm

Documentation

Index

• Variables
• func CanTransfer(db evm.StateDB, addr common.Address, amount *big.Int) bool
• func GetHashFn(ref *types.Header, chain ChainContext) func(n uint64) common.Hash
• func NewEVMContext(msg Message, header *types.Header, chain ChainContext, author *common.Address) evm.Context
• func NewEVMContextWithMessage(context evm.Context, msg Message) evm.Context
• func NewEVMContextWithoutMessage(header *types.Header, chain ChainContext, author *common.Address) evm.Context
• func Transfer(db evm.StateDB, sender, recipient common.Address, amount *big.Int)
• type ChainContext
• type Message

Variables

var (
	ErrOutOfGas                 = errors.New("out of gas")
	ErrCodeStoreOutOfGas        = errors.New("contract creation code storage out of gas")
	ErrDepth                    = errors.New("max call depth exceeded")
	ErrTraceLimitReached        = errors.New("the number of logs reached the specified limit")
	ErrInsufficientBalance      = errors.New("insufficient balance for transfer")
	ErrContractAddressCollision = errors.New("contract address collision")
)

Functions

func CanTransfer

func CanTransfer(db evm.StateDB, addr common.Address, amount *big.Int) bool

CanTransfer checks wether there are enough funds in the address' account to make a transfer. This does not take the necessary gas in to account to make the transfer valid.

func GetHashFn

func GetHashFn(ref *types.Header, chain ChainContext) func(n uint64) common.Hash

GetHashFn returns a GetHashFunc which retrieves header hashes by number

func NewEVMContext

func NewEVMContext(msg Message, header *types.Header, chain ChainContext, author *common.Address) evm.Context

NewEVMContext creates a new context for use in the EVM.

func NewEVMContextWithMessage

func NewEVMContextWithMessage(context evm.Context, msg Message) evm.Context

func NewEVMContextWithoutMessage

func NewEVMContextWithoutMessage(header *types.Header, chain ChainContext, author *common.Address) evm.Context

NewEVMContextWithoutMessage creates a new context without message for use in the EVM.

func Transfer

func Transfer(db evm.StateDB, sender, recipient common.Address, amount *big.Int)

Transfer subtracts amount from sender and adds amount to recipient using the given Db

Types

type ChainContext

type ChainContext interface {
	// Engine retrieves the chain's consensus engine.
	Engine() consensus.Engine

	// GetHeader returns the hash corresponding to their hash.
	GetHeader(common.Hash, uint64) *types.Header
}

ChainContext supports retrieving headers and consensus parameters from the current blockchain to be used during transaction processing.

type Message

type Message interface {
	From() common.Address
	//FromFrontier() (common.Address, error)
	To() *common.Address

	GasPrice() *big.Int
	Gas() uint64
	Value() *big.Int

	Nonce() uint64
	CheckNonce() bool
	Data() []byte
}

Message represents a message sent to a contract.