SolRengine Transactions

SOL transfer model, confirmation tracking, and Stimulus controller for Rails. Build transactions with @solana/kit, sign with wallet-standard, track confirmation via background job.

Part of the SolRengine framework.

gem "solrengine-transactions"

rails generate solrengine:transactions:install
rails db:prepare

# config/initializers/solrengine.rb
Solrengine::Transactions.configure do |config|
  config.transfer_class = "Transfer" # default, change if your model is named differently
end

class Transfer < ApplicationRecord
  include Solrengine::Transactions::Transferable
end

Solrengine::Transactions::ConfirmationJob.perform_later(transfer.id)

The job uses the solana_confirmation queue. Configure your queue adapter accordingly:

# config/sidekiq.yml
:queues:
  - default
  - solana_confirmation

Include TransferUpdates in your transfers controller to enforce ownership and valid status transitions:

class TransfersController < ApplicationController
  include Solrengine::Transactions::TransferUpdates

  def update
    transfer = find_user_transfer # scopes to current_user

    unless valid_status_transition?(transfer, params[:status])
      return head :unprocessable_entity
    end

    transfer.update!(signature: params[:signature], status: params[:status])
    head :ok
  end
end

Important: Always scope transfer lookups to the current user. Never allow unauthenticated access to transfer updates. Validate the transfer amount against the on-chain balance in your create action.

The controller expects these data attributes:

<div data-controller="transfer"
     data-transfer-create-url-value="/transfers"
     data-transfer-dashboard-url-value="/dashboard"
     data-transfer-wallet-value="<%= current_user.wallet_address %>"
     data-transfer-balance-value="<%= @balance %>"
     data-transfer-rpc-url-value="<%= Solrengine::Rpc.endpoint %>"
     data-transfer-chain-value="solana:devnet"
     data-transfer-transfers-path-value="/transfers">

The chain value must be one of solana:mainnet, solana:devnet, or solana:testnet. The transfers-path value defaults to /transfers.

Your server's create endpoint must return last_valid_block_height from the getLatestBlockhash RPC response:

{
  "transfer_id": 1,
  "sender": "...",
  "recipient": "...",
  "amount_lamports": 1000000000,
  "blockhash": "...",
  "last_valid_block_height": 123456789
}

MIT