consts

Documentation

Overview

Package consts contains constants used throughout the entire library and errors.

Index

• Constants
• Variables
• type SecurityLevel

Constants

const (
	// TrinaryRadix defines the base of the trinary system.
	TrinaryRadix = 3
	// TryteRadix defines the radix used for tryte conversions.
	TryteRadix = 27
	// TryteAlphabet are letters of the alphabet and the number 9
	// which directly map to decimal values of a single Tryte value.
	TryteAlphabet = "9ABCDEFGHIJKLMNOPQRSTUVWXYZ"
	// TritsPerTryte is the number of trits in one tryte
	TritsPerTryte = 3
	// MinTryteValue is the minimum value of a tryte value.
	MinTryteValue = -13
	// MaxTryteValue is the maximum value of a tryte value.
	MaxTryteValue = 13
	// MinTritValue is the minimum value of a trit value.
	MinTritValue = -1
	// MaxTritValue is the maximum value of a trit value.
	MaxTritValue = 1
)

const (
	// HashTrinarySize is the standard size for hashes from Curl or Kerl.
	HashTrinarySize = 243
	// HashTrytesSize is the trytes size of HashTrinarySize.
	HashTrytesSize = HashTrinarySize / 3
	// HashBytesSize is the bytes size of HashTrytesSize.
	HashBytesSize = 48
	// IntLength is used for bytes-trytes conversion.
	IntLength = HashBytesSize / 4
	// KeySegmentsPerFragment is the amount of segments per key fragment.
	KeySegmentsPerFragment = 27
	// KeyFragmentLength defines the length of a key fragment.
	KeyFragmentLength = HashTrinarySize * KeySegmentsPerFragment // 6561
	// KeySegmentHashRounds is the amount of hashing rounds during key segment hashing.
	KeySegmentHashRounds = 26
)

const (
	AddressChecksumTrytesSize     = 9
	AddressWithChecksumTrytesSize = HashTrytesSize + AddressChecksumTrytesSize
	MinChecksumTrytesSize         = 3

	// Total supply of IOTA available in the network. Used for ensuring a balanced ledger state and bundle balances
	// = (3^33 - 1) / 2
	TotalSupply uint64 = 1300000000000000
)

Address, balance and checksum constants.

const (
	UpperBoundAttachmentTimestamp = (3 ^ 27 - 1) / 2
	LowerBoundAttachmentTimestamp = 0
)

Attachment timestamp constants.

const (
	SignatureMessageFragmentTrinaryOffset = 0
	SignatureMessageFragmentTrinarySize   = 6561
	AddressTrinaryOffset                  = SignatureMessageFragmentTrinaryOffset + SignatureMessageFragmentTrinarySize
	AddressTrinarySize                    = 243
	ValueOffsetTrinary                    = AddressTrinaryOffset + AddressTrinarySize
	ValueUsedSizeTrinary                  = 33
	ValueSizeTrinary                      = 81
	ObsoleteTagTrinaryOffset              = ValueOffsetTrinary + ValueSizeTrinary
	ObsoleteTagTrinarySize                = 81
	TimestampTrinaryOffset                = ObsoleteTagTrinaryOffset + ObsoleteTagTrinarySize
	TimestampTrinarySize                  = 27
	CurrentIndexTrinaryOffset             = TimestampTrinaryOffset + TimestampTrinarySize
	CurrentIndexTrinarySize               = 27
	LastIndexTrinaryOffset                = CurrentIndexTrinaryOffset + CurrentIndexTrinarySize
	LastIndexTrinarySize                  = 27
	BundleTrinaryOffset                   = LastIndexTrinaryOffset + LastIndexTrinarySize
	BundleTrinarySize                     = 243
	TrunkTransactionTrinaryOffset         = BundleTrinaryOffset + BundleTrinarySize
	TrunkTransactionTrinarySize           = 243
	BranchTransactionTrinaryOffset        = TrunkTransactionTrinaryOffset + TrunkTransactionTrinarySize
	BranchTransactionTrinarySize          = 243
	TagTrinaryOffset                      = BranchTransactionTrinaryOffset + BranchTransactionTrinarySize
	TagTrinarySize                        = 81
	AttachmentTimestampTrinaryOffset      = TagTrinaryOffset + TagTrinarySize
	AttachmentTimestampTrinarySize        = 27

	AttachmentTimestampLowerBoundTrinaryOffset = AttachmentTimestampTrinaryOffset + AttachmentTimestampTrinarySize
	AttachmentTimestampLowerBoundTrinarySize   = 27
	AttachmentTimestampUpperBoundTrinaryOffset = AttachmentTimestampLowerBoundTrinaryOffset + AttachmentTimestampLowerBoundTrinarySize
	AttachmentTimestampUpperBoundTrinarySize   = 27
	NonceTrinaryOffset                         = AttachmentTimestampUpperBoundTrinaryOffset + AttachmentTimestampUpperBoundTrinarySize
	NonceTrinarySize                           = 81

	TransactionTrinarySize = SignatureMessageFragmentTrinarySize + AddressTrinarySize +
		ValueSizeTrinary + ObsoleteTagTrinarySize + TimestampTrinarySize +
		CurrentIndexTrinarySize + LastIndexTrinarySize + BundleTrinarySize +
		TrunkTransactionTrinarySize + BranchTransactionTrinarySize +
		TagTrinarySize + AttachmentTimestampTrinarySize +
		AttachmentTimestampLowerBoundTrinarySize + AttachmentTimestampUpperBoundTrinarySize +
		NonceTrinarySize

	SignatureMessageFragmentSizeInTrytes = SignatureMessageFragmentTrinarySize / 3
	TransactionTrytesSize                = TransactionTrinarySize / 3
)

Transaction elements size and offsets.

const (
	ISSFragments   uint64 = 27
	ISSKeyLength   uint64 = HashTrinarySize * ISSFragments
	ISSChunkLength int    = HashTrinarySize / TrinaryRadix
)

Merkle constants.

const (
	// DefaultMinWeightMagnitude is the default difficulty on mainnet.
	DefaultMinWeightMagnitude = 14
)

Variables

var (
	NullHashTrytes                     = strings.Repeat("9", HashTrytesSize)
	NullTagTrytes                      = strings.Repeat("9", TagTrinarySize/3)
	NullNonceTrytes                    = strings.Repeat("9", NonceTrinarySize/3)
	NullSignatureMessageFragmentTrytes = strings.Repeat("9", SignatureMessageFragmentTrinarySize/3)
	NullAddressWithChecksum            = strings.Repeat("9", HashTrytesSize) + "A9BEONKZW"
)

Null value constants.

var (
	// ErrSettingsNil gets returned when no settings are supplied to ComposeAPI().
	ErrSettingsNil = errors.New("settings must not be nil")
	// ErrInvalidSettingsType gets returned if the wrong underlying type of Settings were supplied for creating a Provider.
	ErrInvalidSettingsType = errors.New("incompatible settings type supplied")
	// ErrInconsistentSubtangle gets returned when the tail transaction is not consistent during promotion.
	ErrInconsistentSubtangle = errors.New("inconsistent subtangle")
	// ErrInvalidSqueezeLength gets returned when the squeeze length is not a multiple of 243 (which it must be for Kerl).
	ErrInvalidSqueezeLength = errors.New("squeeze length must be a multiple of 243")
	// ErrInvalidTritsLength gets returned when the trits length are invalid for the given operation.
	ErrInvalidTritsLength = errors.New("invalid trits length")
	// ErrInvalidTrytesLength gets returned when the trytes length are invalid for the given operation.
	ErrInvalidTrytesLength = errors.New("invalid trytes length")
	// ErrInvalidBytesLength gets returned when the bytes length are invalid for the given operation.
	ErrInvalidBytesLength = errors.New("invalid bytes length")
	// ErrInsufficientBalance gets returned when an operation needs a certain amount of balance to fulfill the operation.
	ErrInsufficientBalance = errors.New("insufficient balance")
	// ErrInvalidAddress gets returned for invalid address parameters.
	ErrInvalidAddress = errors.New("invalid address")
	// ErrInvalidRemainderAddress gets returned for invalid remainder address parameters.
	ErrInvalidRemainderAddress = errors.New("invalid remainder address")
	// ErrInvalidBranchTransaction gets returned for invalid branch transaction parameters.
	ErrInvalidBranchTransaction = errors.New("invalid branch transaction")
	// ErrInvalidBundle gets returned for Bundles which are schematically wrong or/and don't pass validation.
	ErrInvalidBundle = errors.New("invalid bundle")
	// ErrInvalidBundleTotalValue gets returned for Bundles whose total value would overflow/underflow from the total supply.
	ErrInvalidBundleTotalValue = errors.New("invalid bundle total value")
	// ErrInvalidBundleAddressValue gets returned for Bundles with balance mutations in an address that would overflow/underflow from the total supply.
	ErrInvalidBundleAddressValue = errors.New("invalid bundle address value")
	// ErrInvalidBundleHash gets returned for invalid bundle hash parameters.
	ErrInvalidBundleHash = errors.New("invalid bundle hash")
	// ErrInvalidSignature gets returned for bundles with invalid signatures.
	ErrInvalidSignature = errors.New("invalid signature")
	// ErrInvalidChecksum gets returned for addresses with invalid checksum.
	ErrInvalidChecksum = errors.New("invalid checksum")
	// ErrInvalidHash gets returned for invalid hash parameters.
	ErrInvalidHash = errors.New("invalid hash")
	// ErrInvalidValue gets returned for invalid values (e.g. upper 48 trits of the value field used).
	ErrInvalidValue = errors.New("invalid value")
	// ErrInvalidIndex gets returned for invalid index parameters.
	ErrInvalidIndex = errors.New("invalid index option")
	// ErrInvalidTotalOption gets returned for invalid total option parameters.
	ErrInvalidTotalOption = errors.New("invalid total option")
	// ErrInvalidInput gets returned for invalid input parameters.
	ErrInvalidInput = errors.New("invalid input")
	// ErrInvalidSecurityLevel gets returned for invalid security level parameters.
	ErrInvalidSecurityLevel = errors.New("invalid security option")
	// ErrInvalidSeed gets returned for invalid seed parameters.
	ErrInvalidSeed = errors.New("invalid seed")
	// ErrInvalidStartEndOptions gets returned for invalid end options.
	ErrInvalidStartEndOptions = errors.New("invalid end option")
	// ErrInvalidTag gets returned for invalid tags.
	ErrInvalidTag = errors.New("invalid tag")
	// ErrInvalidTransaction gets returned when transactions trits don't make up a valid transaction.
	ErrInvalidTransaction = errors.New("invalid transaction")
	// ErrInvalidTransactionTrytes gets returned for invalid transaction trytes.
	ErrInvalidTransactionTrytes = errors.New("invalid transaction trytes")
	// ErrInvalidAttachedTrytes gets returned for invalid attached transaction trytes.
	ErrInvalidAttachedTrytes = errors.New("invalid attached trytes")
	// ErrInvalidTransactionHash gets returned for invalid transaction hash parameters.
	ErrInvalidTransactionHash = errors.New("invalid transaction hash")
	// ErrInvalidTailTransaction gets returned for invalid tail transaction hashes.
	ErrInvalidTailTransaction = errors.New("invalid tail transaction")
	// ErrInvalidTransfer gets returned for invalid transfer parameters.
	ErrInvalidTransfer = errors.New("invalid transfer object")
	// ErrInvalidTrunkTransaction gets returned for invalid trunk transaction parameters.
	ErrInvalidTrunkTransaction = errors.New("invalid trunk transaction")
	// ErrInvalidReferenceHash gets returned for invalid reference hashes.
	ErrInvalidReferenceHash = errors.New("invalid reference hash")
	// ErrInvalidTrytes gets returned for invalid trytes.
	ErrInvalidTrytes = errors.New("invalid trytes")
	// ErrInvalidByte gets returned for an invalid byte for a to trits conversion (5 packed trits in 1 byte).
	ErrInvalidByte = errors.New("invalid byte")
	// ErrInvalidTrit gets returned for invalid trit.
	ErrInvalidTrit = errors.New("invalid trit")
	// ErrInvalidURI gets returned for invalid URIs.
	ErrInvalidURI = errors.New("invalid uri")
	// ErrInvalidASCIIInput gets returned for invalid ASCII input for to trytes conversion.
	ErrInvalidASCIIInput = errors.New("conversion to trytes requires type of input to be encoded in ascii")
	// ErrInvalidOddLength gets returned for odd trytes length for to ASCII conversion.
	ErrInvalidOddLength = errors.New("conversion from trytes requires length of trytes to be even")
	// ErrInvalidTryteEncodedJSON gets returned for invalid tryte encoded JSON messages.
	ErrInvalidTryteEncodedJSON = errors.New("invalid tryte encoded JSON message")
	// ErrSendingBackToInputs gets returned when a transfer sends back to an Input.
	ErrSendingBackToInputs = errors.New("one of the transaction inputs is used as output")
	// ErrNoRemainderSpecified gets returned when no remainder was specified for certain type of operations.
	ErrNoRemainderSpecified = errors.New("remainder address is needed on a transfer with remainder")
)

Types

type SecurityLevel

type SecurityLevel int

SecurityLevel defines the security level used for input transactions or respectively, how many signature fragments will be generated for value transfers.

const (
	// SecurityLevelLow is for devices with low performance and only storing a small amount of value.
	SecurityLevelLow SecurityLevel = 1
	// SecurityLevelMedium is the standard security level for wallets and other applications.
	SecurityLevelMedium SecurityLevel = 2
	// SecurityLevelHigh is recommended for exchanges and other high security applications.
	SecurityLevelHigh SecurityLevel = 3
	// MaxSecurityLevel is the maximum security level.
	MaxSecurityLevel = 3
)