Module: Solana::Ruby::Kit::Addresses

Extended by:
T::Sig
Defined in:
lib/solana/ruby/kit/addresses/curve.rb,
lib/solana/ruby/kit/addresses/address.rb,
lib/solana/ruby/kit/addresses/public_key.rb,
lib/solana/ruby/kit/addresses/program_derived_address.rb

Defined Under Namespace

Classes: Address, OffCurveAddress, ProgramDerivedAddress

Constant Summary collapse

CURVE_P =

Field prime p = 2^255 − 19

T.let(T.unsafe(2**255 - 19), Integer)
CURVE_D =

Curve constant d = −121665/121666 mod p (computed to avoid oversized literals)

T.let((-121665 * 121666.pow(CURVE_P - 2, CURVE_P)) % CURVE_P, Integer)
CURVE_SQRT_M1 =

sqrt(−1) mod p = 2^((p−1)/4) mod p

T.let(2.pow((CURVE_P - 1) / 4, CURVE_P), Integer)
ADDRESS_BYTE_LENGTH =

Expected byte length of a Solana address.

T.let(32, Integer)
ADDRESS_MIN_STR_LEN =

Minimum / maximum character lengths for a base58-encoded 32-byte address.

T.let(32, Integer)
ADDRESS_MAX_STR_LEN = 
T.let(44, Integer)
ProgramDerivedAddressBump =

The integer bump seed used when deriving a PDA. Must be in [0, 255]. Mirrors TypeScript: ‘type ProgramDerivedAddressBump = Brand<number, ’ProgramDerivedAddressBump’>‘

T.type_alias { Integer }
Seed =

Accepted seed types mirror TypeScript’s Seeds union:

type Seed = ReadonlyUint8Array | string

In Ruby, a seed is either a binary String or an Integer Array.

T.type_alias { T.any(String, T::Array[Integer]) }
MAX_SEED_LENGTH =

Maximum byte length of a single seed.

T.let(32, Integer)
MAX_SEEDS =

Maximum number of seeds per PDA derivation.

T.let(16, Integer)
PDA_MARKER_BYTES =

Marker bytes appended during hashing: UTF-8 “ProgramDerivedAddress”.

T.let('ProgramDerivedAddress'.b, String)

Class Method Summary collapse

Class Method Details

.address(putative) ⇒ Object 



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# File 'lib/solana/ruby/kit/addresses/address.rb', line 121

def address(putative)
  assert_address!(putative)
  Address.new(putative)
end

.address?(putative) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/solana/ruby/kit/addresses/address.rb', line 94

def address?(putative)
  return false unless putative.length.between?(ADDRESS_MIN_STR_LEN, ADDRESS_MAX_STR_LEN)
  return false unless putative.chars.all? { |c| Encoding::Base58::ALPHABET.include?(c) }

  bytes = Encoding::Base58.decode(putative)
  bytes.bytesize == ADDRESS_BYTE_LENGTH
rescue ArgumentError
  false
end

.address_comparator ⇒ Object 



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# File 'lib/solana/ruby/kit/addresses/address.rb', line 129

def address_comparator
  ->(a, b) { a.value <=> b.value }
end

.assert_address!(putative) ⇒ Object 



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# File 'lib/solana/ruby/kit/addresses/address.rb', line 107

def assert_address!(putative)
  unless putative.length.between?(ADDRESS_MIN_STR_LEN, ADDRESS_MAX_STR_LEN)
    Kernel.raise SolanaError.new(
      SolanaError::ADDRESSES__STRING_LENGTH_OUT_OF_RANGE,
      actual_length: putative.length
    )
  end

  Kernel.raise SolanaError.new(SolanaError::ADDRESSES__INVALID_BASE58_ENCODED_ADDRESS) unless address?(putative)
end

.assert_off_curve_address!(addr) ⇒ Object 



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# File 'lib/solana/ruby/kit/addresses/curve.rb', line 100

def assert_off_curve_address!(addr)
  Kernel.raise SolanaError.new(SolanaError::ADDRESSES__SEEDS_POINT_ON_CURVE) if on_ed25519_curve?(decode_address(addr))
end

.assert_program_derived_address!(value) ⇒ Object 



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# File 'lib/solana/ruby/kit/addresses/program_derived_address.rb', line 57

def assert_program_derived_address!(value)
  Kernel.raise SolanaError.new(SolanaError::ADDRESSES__INVALID_SEEDS_POINT_ON_CURVE) unless value.is_a?(ProgramDerivedAddress)
  Kernel.raise SolanaError.new(SolanaError::ADDRESSES__PDA_BUMP_SEED_OUT_OF_RANGE) unless value.bump.between?(0, 255)
end

.create_address_with_seed(base_address:, program_address:, seed:) ⇒ Object 



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# File 'lib/solana/ruby/kit/addresses/program_derived_address.rb', line 120

def create_address_with_seed(base_address:, program_address:, seed:)
  seed_bytes = seed.b

  if seed_bytes.bytesize > MAX_SEED_LENGTH
    Kernel.raise SolanaError.new(
      SolanaError::ADDRESSES__MAX_SEED_LENGTH_EXCEEDED,
      actual_length: seed_bytes.bytesize
    )
  end

  base_bytes    = decode_address(base_address)
  program_bytes = decode_address(program_address)

  # hash_input = base_address || seed || program_address
  hash_input   = base_bytes + seed_bytes + program_bytes
  result_bytes = Digest::SHA256.digest(hash_input)

  Address.new(encode_address(result_bytes))
end

.decode_address(addr) ⇒ Object 



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# File 'lib/solana/ruby/kit/addresses/address.rb', line 81

def decode_address(addr)
  bytes = Encoding::Base58.decode(addr.value)
  Kernel.raise SolanaError.new(
    SolanaError::ADDRESSES__INVALID_BYTE_LENGTH_FOR_ADDRESS,
    byte_length: bytes.bytesize
  ) unless bytes.bytesize == ADDRESS_BYTE_LENGTH

  bytes
end

.encode_address(bytes) ⇒ Object 



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# File 'lib/solana/ruby/kit/addresses/address.rb', line 69

def encode_address(bytes)
  Kernel.raise SolanaError.new(
    SolanaError::ADDRESSES__INVALID_BYTE_LENGTH_FOR_ADDRESS,
    byte_length: bytes.bytesize
  ) unless bytes.bytesize == ADDRESS_BYTE_LENGTH

  Encoding::Base58.encode(bytes)
end

.get_address_from_public_key(verify_key) ⇒ Object 



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# File 'lib/solana/ruby/kit/addresses/public_key.rb', line 19

def get_address_from_public_key(verify_key)
  unless verify_key.is_a?(RbNaCl::VerifyKey)
    Kernel.raise SolanaError.new(SolanaError::ADDRESSES__INVALID_ED25519_PUBLIC_KEY)
  end

  Address.new(encode_address(verify_key.to_bytes))
end

.get_program_derived_address(program_address:, seeds:) ⇒ Object 



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# File 'lib/solana/ruby/kit/addresses/program_derived_address.rb', line 74

def get_program_derived_address(program_address:, seeds:)
  if seeds.length > MAX_SEEDS
    Kernel.raise SolanaError.new(SolanaError::ADDRESSES__TOO_MANY_SEEDS)
  end

  seeds.each do |seed|
    seed_bytes = seed_to_bytes(seed)
    if seed_bytes.bytesize > MAX_SEED_LENGTH
      Kernel.raise SolanaError.new(
        SolanaError::ADDRESSES__MAX_SEED_LENGTH_EXCEEDED,
        actual_length: seed_bytes.bytesize
      )
    end
  end

  program_bytes = decode_address(program_address)

  255.downto(0) do |bump|
    seed_bytes_list = seeds.map { |s| seed_to_bytes(s) }
    bump_bytes       = [bump].pack('C').b

    # hash_input = seed1 || seed2 || ... || bump || program_address || "ProgramDerivedAddress"
    hash_input = (seed_bytes_list + [bump_bytes, program_bytes, PDA_MARKER_BYTES]).join

    candidate_bytes = Digest::SHA256.digest(hash_input)

    next if on_ed25519_curve?(candidate_bytes)

    candidate_address = Address.new(encode_address(candidate_bytes))
    return ProgramDerivedAddress.new(address: candidate_address, bump: bump)
  end

  Kernel.raise SolanaError.new(SolanaError::ADDRESSES__FAILED_TO_FIND_VIABLE_PDA_BUMP_SEED)
end

.get_public_key_from_address(addr) ⇒ Object 



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# File 'lib/solana/ruby/kit/addresses/public_key.rb', line 32

def get_public_key_from_address(addr)
  bytes = decode_address(addr)
  RbNaCl::VerifyKey.new(bytes)
rescue RangeError, ScriptError => e
  Kernel.raise SolanaError.new(SolanaError::ADDRESSES__INVALID_ED25519_PUBLIC_KEY)
end

.off_curve_address(addr) ⇒ Object 



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# File 'lib/solana/ruby/kit/addresses/curve.rb', line 107

def off_curve_address(addr)
  assert_off_curve_address!(addr)
  OffCurveAddress.new(addr.value)
end

.off_curve_address?(addr) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/solana/ruby/kit/addresses/curve.rb', line 92

def off_curve_address?(addr)
  bytes = decode_address(addr)
  off_curve_bytes?(bytes)
end

.off_curve_bytes?(bytes) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/solana/ruby/kit/addresses/curve.rb', line 85

def off_curve_bytes?(bytes)
  !on_ed25519_curve?(bytes)
end

.on_ed25519_curve?(bytes) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/solana/ruby/kit/addresses/curve.rb', line 41

def on_ed25519_curve?(bytes)
  return false unless bytes.bytesize == 32

  p = CURVE_P
  d = CURVE_D

  y_arr = bytes.bytes.dup
  x_sign = (y_arr[31] >> 7) & 1
  y_arr[31] &= 0x7f

  # Little-endian byte array → big integer
  y = y_arr.each_with_index.sum { |b, i| b << (8 * i) }
  return false if y >= p

  y2 = y.pow(2, p)
  u  = (y2 - 1) % p       # numerator:   y² − 1
  v  = (d * y2 + 1) % p   # denominator: d·y² + 1

  # RFC 8032 square-root formula:
  #   x = (u·v³) · (u·v⁷)^((p−5)/8)  mod p
  v3   = v.pow(3, p)
  v7   = v.pow(7, p)
  exp  = (p - 5) / 8
  x    = u * v3 % p * (u * v7 % p).pow(exp, p) % p
  vx2  = v * x.pow(2, p) % p

  if vx2 == u % p
    # Valid root found; adjust sign.
    x = (p - x) % p if (x & 1) != x_sign
    return true
  end

  if vx2 == (p - u) % p
    # x must be multiplied by sqrt(−1).
    x = x * CURVE_SQRT_M1 % p
    x = (p - x) % p if (x & 1) != x_sign
    return true
  end

  false
end

.program_derived_address?(value) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/solana/ruby/kit/addresses/program_derived_address.rb', line 46

def program_derived_address?(value)
  return false unless value.is_a?(ProgramDerivedAddress)
  return false unless address?(value.address.value)

  bump = value.bump
  bump.between?(0, 255)
end