params

Documentation

Index

• Constants
• Variables
• func CalcGasLimit(parent *types.Block) uint64
• type ChainConfig
• type GasTable

Constants

const (
	// GenesisGasLimit Gas limit of the Genesis block.
	GenesisGasLimit uint64 = 100000000
	// MinGasLimit Minimum the gas limit may ever be.
	MinGasLimit uint64 = 5000
	// GasLimitBoundDivisor The bound divisor of the gas limit, used in update calculations.
	GasLimitBoundDivisor uint64 = 1024
	// MaximumExtraDataSize Maximum size extra data may be after Genesis.
	MaximumExtraDataSize uint64 = 32 + 65
	// ActionGas Per action not creating a contract. NOTE: Not payable on data of calls between transactions.
	ActionGas uint64 = 21000
	// ActionGasContractCreation Per action that creates a contract. NOTE: Not payable on data of calls between transactions.
	ActionGasContractCreation uint64 = 53000
	// TxDataNonZeroGas Per byte of data attached to a transaction that is not equal to zero. NOTE:Not payable on data of calls between transactions.
	TxDataNonZeroGas uint64 = 68
	// TxDataZeroGas Per byte of data attached to a transaction that equals zero. NOTE: Not payable on data of calls between transactions.
	TxDataZeroGas uint64 = 4

	ExpByteGas           uint64 = 10    // Times ceil(log256(exponent)) for the EXP instruction.
	SloadGas             uint64 = 50    // Multiplied by the number of 32-byte words that are copied (round up) for any *COPY operation and added.
	CallValueTransferGas uint64 = 9000  // Paid for CALL when the value transfer is non-zero.
	CallNewAccountGas    uint64 = 25000 // Paid for CALL when the destination address didn't exist prior.
	QuadCoeffDiv         uint64 = 512   // Divisor for the quadratic particle of the memory cost equation.
	SstoreSetGas         uint64 = 20000 // Once per SLOAD operation.
	LogDataGas           uint64 = 8     // Per byte in a LOG* operation's data.
	CallStipend          uint64 = 2300  // Free gas given at beginning of call.

	Sha3Gas          uint64 = 30    // Once per SHA3 operation.
	Sha3WordGas      uint64 = 6     // Once per word of the SHA3 operation's data.
	SstoreResetGas   uint64 = 5000  // Once per SSTORE operation if the zeroness changes from zero.
	SstoreClearGas   uint64 = 5000  // Once per SSTORE operation if the zeroness doesn't change.
	SstoreRefundGas  uint64 = 15000 // Once per SSTORE operation if the zeroness changes to zero.
	JumpdestGas      uint64 = 1     // Refunded gas, once per SSTORE operation if the zeroness changes to zero.
	EpochDuration    uint64 = 30000 // Duration between proof-of-work epochs.
	CallGas          uint64 = 40    // Once per CALL operation & message call transaction.
	CreateDataGas    uint64 = 200   //
	CallCreateDepth  uint64 = 1024  // Maximum depth of call/create stack.
	ExpGas           uint64 = 10    // Once per EXP instruction
	LogGas           uint64 = 375   // Per LOG* operation.
	CopyGas          uint64 = 3     //
	StackLimit       uint64 = 1024  // Maximum size of VM stack allowed.
	TierStepGas      uint64 = 0     // Once per operation, for a selection of them.
	LogTopicGas      uint64 = 375   // Multiplied by the * of the LOG*, per LOG transaction. e.g. LOG0 incurs 0 * c_txLogTopicGas, LOG4 incurs 4 * c_txLogTopicGas.
	CreateGas        uint64 = 32000 // Once per CREATE operation & contract-creation transaction.
	SuicideRefundGas uint64 = 24000 // Refunded following a suicide operation.
	MemoryGas        uint64 = 3     // Times the address of the (highest referenced byte in memory + 1). NOTE: referencing happens on read, write and in instructions such as RETURN and CALL.

	MaxCodeSize = 24576 // Maximum bytecode to permit for a contract

	EcrecoverGas            uint64 = 3000   // Elliptic curve sender recovery gas price
	Sha256BaseGas           uint64 = 60     // Base price for a SHA256 operation
	Sha256PerWordGas        uint64 = 12     // Per-word price for a SHA256 operation
	Ripemd160BaseGas        uint64 = 600    // Base price for a RIPEMD160 operation
	Ripemd160PerWordGas     uint64 = 120    // Per-word price for a RIPEMD160 operation
	IdentityBaseGas         uint64 = 15     // Base price for a data copy operation
	IdentityPerWordGas      uint64 = 3      // Per-work price for a data copy operation
	ModExpQuadCoeffDiv      uint64 = 20     // Divisor for the quadratic particle of the big int modular exponentiation
	Bn256AddGas             uint64 = 500    // Gas needed for an elliptic curve addition
	Bn256ScalarMulGas       uint64 = 40000  // Gas needed for an elliptic curve scalar multiplication
	Bn256PairingBaseGas     uint64 = 100000 // Base price for an elliptic curve pairing check
	Bn256PairingPerPointGas uint64 = 80000  // Per-point price for an elliptic curve pairing check

	Wei   = 1
	GWei  = 1e9
	Ether = 1e18
)

const (
	// VersionMajor is Major version component of the current release
	VersionMajor = 0
	// VersionMinor is Minor version component of the current release
	VersionMinor = 1
	// VersionPatch is Patch version component of the current release
	VersionPatch = 0
	// VersionMeta is Version metadata to append to the version string
	VersionMeta = "unstable"
)

const (
	//ClientIdentifier Client identifier to advertise over the network
	ClientIdentifier = "ft"
)

const DefaultPubkeyHex = "" /* 130-byte string literal not displayed */

const (
	Fractal = 1e18
)

Variables

var (
	DifficultyBoundDivisor = big.NewInt(2048)   // The bound divisor of the difficulty, used in the update calculations.
	GenesisDifficulty      = big.NewInt(131072) // Difficulty of the Genesis block.
	MinimumDifficulty      = big.NewInt(131072) // The minimum that the difficulty may ever be.
	DurationLimit          = big.NewInt(13)     // The decision boundary on the blocktime duration used to determine whether difficulty should go up or not.
)

var DefaultChainconfig = &ChainConfig{
	ChainID:  big.NewInt(1),
	SysName:  "ftsystemio",
	SysToken: "ftoken",
}

var (

	// GasTable contain the gas re-prices
	GasTableInstanse = GasTable{
		ExtcodeSize: 700,
		ExtcodeCopy: 700,
		Balance:     400,
		SLoad:       200,
		Calls:       700,
		Suicide:     5000,
		ExpByte:     50,

		CreateBySuicide: 25000,
		SetOwner:        200,
	}
)

Variables containing gas prices for different ethereum phases.

var GitCommit = func() string {
	head := readGitFile("HEAD")
	if splits := strings.Split(head, " "); len(splits) == 2 {
		head = splits[1]
		return readGitFile(head)
	}
	return ""
}

GitCommit Git SHA1 commit hash of the release (set via linker flags)

var Version = func() string {
	v := fmt.Sprintf("%d.%d.%d", VersionMajor, VersionMinor, VersionPatch)
	if VersionMeta != "" {
		v += "-" + VersionMeta
	}
	return v
}()

Version holds the textual version string.

Functions

func CalcGasLimit

func CalcGasLimit(parent *types.Block) uint64

CalcGasLimit computes the gas limit of the next block after parent. This is miner strategy, not consensus protocol.

Types

type ChainConfig

type ChainConfig struct {
	ChainID          *big.Int    `json:"chainId"`  // chainId identifies the current chain and is used for replay protection
	SysName          common.Name `json:"sysName"`  // system name
	SysToken         string      `json:"sysToken"` // system token
	SysTokenID       uint64      `json:"-"`
	SysTokenDecimals uint64      `json:"-"`
}

ChainConfig is the core config which determines the blockchain settings. ChainConfig is stored in the database on a per block basis.

type GasTable

type GasTable struct {
	ExtcodeSize uint64
	ExtcodeCopy uint64
	Balance     uint64
	SLoad       uint64
	Calls       uint64
	Suicide     uint64

	ExpByte uint64

	// CreateBySuicide occurs when the
	// refunded account is one that does
	// not exist. This logic is similar
	// to call. May be left nil. Nil means
	// not charged.
	CreateBySuicide uint64
	SetOwner        uint64
}

GasTable organizes gas prices for different ethereum phases.