Class: BSV::MCP::Tools::BroadcastP2pkh

Inherits:
MCP::Tool
  • Object
show all
Defined in:
lib/bsv/mcp/tools/broadcast_p2pkh.rb

Overview

Builds, signs, and broadcasts a simple P2PKH payment transaction.

Fetches UTXOs for the sender’s address, constructs a transaction with one payment output and one change output, signs all inputs with the provided private key, and submits to ARC in Extended Format (EF/BRC-30).

This is the most complex MCP tool: it orchestrates WIF → PrivateKey → PublicKey → address → UTXO fetch → tx build → sign → broadcast.

Constant Summary collapse

DUST_THRESHOLD =

Minimum output value to avoid dust rejection.

546

Class Method Summary collapse

Class Method Details

.call(wif:, to_address:, satoshis:, network: nil, server_context: nil) ⇒ Object 



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# File 'lib/bsv/mcp/tools/broadcast_p2pkh.rb', line 88

def self.call(wif:, to_address:, satoshis:, network: nil, server_context: nil)
  net_sym = Helpers.resolve_network_sym(network, server_context)

  private_key = BSV::Primitives::PrivateKey.from_wif(wif)
  sender_address = private_key.public_key.address(network: net_sym)

  woc = BSV::Network::Providers::WhatsOnChain.default(network: net_sym)
  utxo_result = woc.call(:get_utxos_all, sender_address)
  return Helpers.error_response("UTXO fetch failed: #{utxo_result.message}") unless utxo_result.success?

  all_utxos = utxo_result.data.map do |entry|
    BSV::Network::UTXO.new(
      tx_hash: entry[:tx_hash], tx_pos: entry[:tx_pos],
      satoshis: entry[:satoshis], height: entry[:height]
    )
  end

  return Helpers.error_response('No UTXOs found for sender address — the address may have no funds') if all_utxos.empty?

  # Greedy UTXO selection: sort descending, take until sufficient
  sorted = all_utxos.sort_by { |u| -u.satoshis }
  selected = select_utxos(sorted, satoshis)
  return Helpers.error_response("Insufficient funds — available: #{all_utxos.sum(&:satoshis)} satoshis") if selected.nil?

  tx = build_transaction(selected, satoshis, to_address, sender_address, private_key)

  arc = build_arc(net_sym, server_context)
  arc_result = arc.call(:broadcast, tx)
  return Helpers.error_response("Broadcast failed: #{arc_result.message}") unless arc_result.success?

  result = {
    txid: arc_result.data[:txid],
    tx_status: arc_result.data[:tx_status],
    hex: tx.to_hex
  }

  ::MCP::Tool::Response.new(
    [::MCP::Content::Text.new(result.to_json)],
    structured_content: result
  )
rescue ArgumentError => e
  Helpers.error_response(e.message)
end