Bytecode.from

Universal constructor for creating bytecode from hex strings or Uint8Array

Try it Live

Run Bytecode examples in the interactive playground

BytecodeLike Type

BytecodeLike is a union type accepting any input that can be coerced to bytecode:

type BytecodeLike =
  | Uint8Array
  | BrandedBytecode
  | Bytecode
  | Hex
  | string

Accepted Types

Uint8Array - Raw byte arrays:

const bytes = new Uint8Array([0x60, 0x01])
const code = Bytecode(bytes)

BrandedBytecode - Branded bytecode (passed through):

const branded = Bytecode("0x6001")
const code = Bytecode(branded)  // No conversion

Hex String - With or without 0x prefix:

const code1 = Bytecode("0x6001")
const code2 = Bytecode("6001")  // Also valid

Strings without 0x prefix may be treated as UTF-8 text, not hex. Always use 0x prefix for hex strings.

Usage in Function Signatures

Use BytecodeLike for flexible function parameters:

function analyzeBytecode(input: BytecodeLike): Analysis {
  const code = Bytecode(input)
  return code.analyze()
}

// All valid calls
analyzeBytecode("0x6001")
analyzeBytecode(new Uint8Array([0x60, 0x01]))
analyzeBytecode(Bytecode("0x6001"))

Performance

No conversion overhead for Uint8Array, BrandedBytecode, and Bytecode (zero-copy).

Conversion required for strings (parses hex and allocates new Uint8Array).

For performance-critical code, prefer passing Uint8Array or BrandedBytecode directly.

See Also

• fromHex - Parse hex string directly
• fromUint8Array - Create from Uint8Array directly