@1inch/byte-utils

Contains helpers to work with bytes

Installation

npm install @1inch/byte-utils

Docs

🧰 Functions

• isHexString
• isHexBytes

⚙️ isHexString

Check that string starts with 0x and has only valid hex symbols

Function	Type
isHexString	(val: string) => boolean

⚙️ isHexBytes

Check that string is valid hex with 0x prefix and length is even

Function	Type
isHexBytes	(val: string) => boolean

🔧 Constants

• UINT_8_MAX
• UINT_24_MAX
• UINT_32_MAX
• UINT_40_MAX
• UINT_48_MAX
• UINT_80_MAX
• UINT_160_MAX
• UINT_128_MAX
• UINT_256_MAX

⚙️ UINT_8_MAX

Constant	Type
UINT_8_MAX	bigint

⚙️ UINT_24_MAX

Constant	Type
UINT_24_MAX	bigint

⚙️ UINT_32_MAX

Constant	Type
UINT_32_MAX	bigint

⚙️ UINT_40_MAX

Constant	Type
UINT_40_MAX	bigint

⚙️ UINT_48_MAX

Constant	Type
UINT_48_MAX	bigint

⚙️ UINT_80_MAX

Constant	Type
UINT_80_MAX	bigint

⚙️ UINT_160_MAX

Constant	Type
UINT_160_MAX	bigint

⚙️ UINT_128_MAX

Constant	Type
UINT_128_MAX	bigint

⚙️ UINT_256_MAX

Constant	Type
UINT_256_MAX	bigint

🏭 BitMask

Class to define bit mask: new BitMask(16, 32) is for bits from [16, 32) => 0xffff0000

Methods

• toString
• toBigInt

⚙️ toString

Method	Type
toString	() => string

⚙️ toBigInt

Method	Type
toBigInt	() => bigint

🏭 BN

Class to work with bits in bignumber Immutable, all methods return new value

Methods

• fromNumber
• fromHex
• add
• sub
• setBit
• getBit
• shiftLeft
• shiftRight
• and
• or
• xor
• isZero
• isOne
• getMask
• setMask
• clearMask
• toHex
• toNumber

⚙️ fromNumber

Method	Type
fromNumber	(n: number) => BN

⚙️ fromHex

Method	Type
fromHex	(hex: string) => BN

⚙️ add

Add value

Method	Type
add	(other: BN) => BN

⚙️ sub

Subtract value

Method	Type
sub	(other: BN) => BN

⚙️ setBit

Method	Type
setBit	(n: bigint, value: 0 or 1) => BN

⚙️ getBit

Method	Type
getBit	(n: bigint) => 0 or 1

⚙️ shiftLeft

Method	Type
shiftLeft	(n: bigint) => BN

⚙️ shiftRight

Method	Type
shiftRight	(n: bigint) => BN

⚙️ and

Method	Type
and	(other: bigint or BN) => BN

⚙️ or

Method	Type
or	(other: bigint or BN) => BN

⚙️ xor

Method	Type
xor	(other: bigint or BN) => BN

⚙️ isZero

Method	Type
isZero	() => boolean

⚙️ isOne

Method	Type
isOne	() => boolean

⚙️ getMask

Return bits defined in mask as BN

Method	Type
getMask	(mask: BitMask) => BN

⚙️ setMask

Set bits defined in mask to value if value is bigger than mask then error will be thrown

Method	Type
setMask	(mask: BitMask, value: bigint or BN) => BN

⚙️ clearMask

Set bits defined in mask to 0s

Method	Type
clearMask	(mask: BitMask) => BN

⚙️ toHex

Return 0x prefixed string with hex representation of BN, padded with '0s' if padNum specified

Method	Type
toHex	(padNum?: number) => string

⚙️ toNumber

Convert BN to Number

Caution: value will be rounded for numbers > Number.MAX_SAFE_INTEGER

Method	Type
toNumber	() => number

🏭 BytesIter

Class to iterate through bytes string by parsing individual bytes

Methods

• BigInt
• String
• rest
• isEmpty
• nextByte
• nextBytes
• nextAddress
• nextUint8
• nextUint16
• nextUint24
• nextUint32
• nextUint128
• nextUint160
• nextUint256

⚙️ BigInt

Method	Type
BigInt	(bytes: string) => BytesIter<bigint>

⚙️ String

Method	Type
String	(bytes: string) => BytesIter<string>

⚙️ rest

Returns all not consumed bytes

Method	Type
rest	() => T

⚙️ isEmpty

Method	Type
isEmpty	() => boolean

⚙️ nextByte

Method	Type
nextByte	(side?: Side) => T

⚙️ nextBytes

Method	Type
nextBytes	(n: number, side?: Side) => T

⚙️ nextAddress

Method	Type
nextAddress	(side?: Side) => T

⚙️ nextUint8

Method	Type
nextUint8	(side?: Side) => T

⚙️ nextUint16

Method	Type
nextUint16	(side?: Side) => T

⚙️ nextUint24

Method	Type
nextUint24	(side?: Side) => T

⚙️ nextUint32

Method	Type
nextUint32	(side?: Side) => T

⚙️ nextUint128

Method	Type
nextUint128	(side?: Side) => T

⚙️ nextUint160

Method	Type
nextUint160	(side?: Side) => T

⚙️ nextUint256

Method	Type
nextUint256	(side?: Side) => T

🏭 BytesBuilder

Helper class to build an arbitrary bytes sequence

Methods

• addAddress
• addBytes
• addByte
• addUint8
• addUint16
• addUint24
• addUint32
• addUint64
• addUint128
• addUint160
• addUint256
• asBigInt
• asHex

⚙️ addAddress

Method	Type
addAddress	(address: string or bigint or BN) => this

⚙️ addBytes

Method	Type
addBytes	(bytes: string) => this

⚙️ addByte

Method	Type
addByte	(byte: string or bigint or BN) => this

⚙️ addUint8

Method	Type
addUint8	(val: string or bigint or BN) => this

⚙️ addUint16

Method	Type
addUint16	(val: string or bigint or BN) => this

⚙️ addUint24

Method	Type
addUint24	(val: string or bigint or BN) => this

⚙️ addUint32

Method	Type
addUint32	(val: string or bigint or BN) => this

⚙️ addUint64

Method	Type
addUint64	(val: string or bigint or BN) => this

⚙️ addUint128

Method	Type
addUint128	(val: string or bigint or BN) => this

⚙️ addUint160

Method	Type
addUint160	(val: string or bigint or BN) => this

⚙️ addUint256

Method	Type
addUint256	(val: string or bigint or BN) => this

⚙️ asBigInt

Returns bytes as single bigint value

Method	Type
asBigInt	() => bigint

⚙️ asHex

Returns hex string

Method	Type
asHex	(prefixed?: boolean) => string

Parameters:

• prefixed: should be string prefixed with 0x or not, true by default