bsv-wallet

```ruby
gem 'bsv-wallet'
gem 'bsv-wallet-postgres'

require 'bsv-wallet-postgres'

# Connect to PostgreSQL
db = Sequel.connect('postgres://localhost/my_wallet')
BSV::Wallet::Postgres.connect(db)

# Compose the wallet
engine = BSV::Wallet::Engine.new(
  store:           BSV::Wallet::Postgres::Store.new,
  utxo_pool:       BSV::Wallet::Postgres::UTXOPool.new(store: store),
  broadcast_queue: BSV::Wallet::Postgres::BroadcastQueue.new(arc_client: arc),
  proof_store:     BSV::Wallet::Postgres::ProofStore.new,
  key_deriver:     BSV::Wallet::KeyDeriver.new(private_key),
  network:         :mainnet
)

# Create a transaction (BRC-100 createAction)
result = engine.create_action(
  description: 'payment to merchant',
  outputs: [
    { satoshis: 5000, locking_script: recipient_script, basket: 'payments' }
  ],
  labels: ['merchant']
)

# result[:txid]  — 32-byte wire-order wtxid
# result[:tx]    — Atomic BEEF binary (BRC-95)
```