Module: Solana::Ruby::Kit::WalletStandard

Extended by:
T::Sig
Defined in:
lib/solana/ruby/kit/wallet_standard.rb

Overview

Server-side Ruby port of the @solana/wallet-standard signTransaction interface.

When a browser wallet (Phantom, Backpack, Solflare, …) calls

wallet.features['solana:signTransaction'].signTransaction(transaction)

the signed transaction is returned as serialised wire bytes. Rails receives those bytes (typically base64-encoded in a JSON request body) and uses this module to:

1. Decode the wire bytes back into a +Transactions::Transaction+ struct.
2. Verify every present Ed25519 signature against the message bytes.
3. Confirm that a specific wallet address (or all required addresses) signed.
4. Optionally broadcast the verified transaction via +Rpc+.

Solana addresses ARE Ed25519 public keys (32-byte base58), so signature verification requires no external key lookup — the verify key is derived directly from the signer’s address string.

Typical Rails controller usage:

wire_bytes = Base64.strict_decode64(params[:signed_transaction])
tx = Solana::Ruby::Kit::WalletStandard.verify_signed_transaction!(wire_bytes)
Solana::Ruby::Kit::Transactions.assert_fully_signed_transaction!(tx)
# tx is now safe to inspect or forward to the RPC node

Mirrors @solana/wallet-standard (anza-xyz/kit) and @wallet-standard/features.

Constant Summary collapse

SIGN_TRANSACTION =

The wallet can sign transactions without broadcasting them.

T.let('solana:signTransaction',        String)
SIGN_AND_SEND_TRANSACTION =

The wallet can sign and broadcast in a single round-trip.

T.let('solana:signAndSendTransaction', String)
SIGN_MESSAGE =

The wallet can sign arbitrary off-chain messages.

T.let('solana:signMessage',            String)
CONNECT =

Base Wallet Standard lifecycle features.

T.let('standard:connect',              String)
DISCONNECT = 
T.let('standard:disconnect',           String)
EVENTS = 
T.let('standard:events',               String)

Class Method Summary collapse

Class Method Details

.decode_wire_transaction(wire_bytes) ⇒ Object 



82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
 
# File 'lib/solana/ruby/kit/wallet_standard.rb', line 82

def decode_wire_transaction(wire_bytes)
  bytes  = coerce_to_binary(wire_bytes)
  offset = 0

  # 1. Signature count (compact-u16)
  sig_count, offset = decode_compact_u16(bytes, offset)
  if sig_count > 19
    Kernel.raise SolanaError.new(
      SolanaError::WALLET_STANDARD__INVALID_WIRE_FORMAT,
      reason: "signature count #{sig_count} exceeds the maximum of 19"
    )
  end

  # 2. Signature slots — 64 bytes each; all-zero means the slot is unfilled.
  zero64   = ("\x00" * 64).b
  raw_sigs = T.let([], T::Array[T.nilable(String)])
  sig_count.times do
    slot = bytes[offset, 64]
    if slot.nil? || slot.bytesize != 64
      Kernel.raise SolanaError.new(
        SolanaError::WALLET_STANDARD__INVALID_WIRE_FORMAT,
        reason: 'truncated signature slot'
      )
    end
    raw_sigs << (slot.b == zero64 ? nil : slot.b)
    offset += 64
  end

  # 3. Everything after the signatures section is the message.
  msg_slice = bytes[offset..]
  if msg_slice.nil? || msg_slice.empty?
    Kernel.raise SolanaError.new(
      SolanaError::WALLET_STANDARD__INVALID_WIRE_FORMAT,
      reason: 'message section is missing'
    )
  end
  message_bytes = T.must(msg_slice).b

  # 4. Determine version and locate the message header.
  #    Legacy transactions:   first byte = num_required_signatures (0..127)
  #    Versioned (v0) trans.: first byte = 0x80 | version  (≥ 128); skip it.
  msg_pos    = 0
  first_byte = message_bytes.getbyte(msg_pos).to_i
  msg_pos   += 1 if (first_byte & 0x80) != 0

  num_required_sigs = message_bytes.getbyte(msg_pos).to_i
  msg_pos += 1
  msg_pos += 2  # skip num_readonly_signed + num_readonly_unsigned

  # 5. Parse the account list to recover signer addresses.
  num_accounts, msg_pos = decode_compact_u16(message_bytes, msg_pos)
  if msg_pos + (num_accounts * 32) > message_bytes.bytesize
    Kernel.raise SolanaError.new(
      SolanaError::WALLET_STANDARD__INVALID_WIRE_FORMAT,
      reason: 'account table truncated'
    )
  end

   = T.let([], T::Array[String])
  num_accounts.times do
     << Addresses.encode_address(message_bytes[msg_pos, 32].b)
    msg_pos += 32
  end

  # 6. Build the signatures map.
  #    The first +num_required_sigs+ accounts in the account table are the
  #    signers; their raw_sigs slots are positionally aligned.
  signer_addrs = [0, num_required_sigs]
  signatures   = T.let({}, T::Hash[String, T.nilable(String)])
  signer_addrs.each_with_index { |addr, i| signatures[addr] = raw_sigs[i] }

  Transactions::Transaction.new(message_bytes: message_bytes, signatures: signatures)
end

.signed_by?(transaction, address) ⇒ Boolean

Returns:

  • (Boolean) 


205
206
207
208
209
210
211
212
 
# File 'lib/solana/ruby/kit/wallet_standard.rb', line 205

def signed_by?(transaction, address)
  sig_raw = transaction.signatures[address.value]
  return false if sig_raw.nil?

  verify_key = RbNaCl::VerifyKey.new(Addresses.decode_address(address))
  sig_bytes  = Keys::SignatureBytes.new(sig_raw)
  Keys.verify_signature(verify_key, sig_bytes, transaction.message_bytes)
end

.verify_signed_transaction!(wire_bytes) ⇒ Object 



195
196
197
198
199
 
# File 'lib/solana/ruby/kit/wallet_standard.rb', line 195

def verify_signed_transaction!(wire_bytes)
  tx = decode_wire_transaction(wire_bytes)
  verify_transaction_signatures!(tx)
  tx
end

.verify_transaction_signatures!(transaction) ⇒ Object 



169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
 
# File 'lib/solana/ruby/kit/wallet_standard.rb', line 169

def verify_transaction_signatures!(transaction)
  transaction.signatures.each do |addr_str, sig_raw|
    next if sig_raw.nil?

    verify_key = RbNaCl::VerifyKey.new(Addresses.decode_address(Addresses::Address.new(addr_str)))
    sig_bytes  = Keys::SignatureBytes.new(sig_raw)

    unless Keys.verify_signature(verify_key, sig_bytes, transaction.message_bytes)
      Kernel.raise SolanaError.new(
        SolanaError::WALLET_STANDARD__SIGNATURE_VERIFICATION_FAILED,
        address: addr_str
      )
    end
  end
end