{-# LANGUAGE OverloadedStrings #-}

-- |
-- Module      : Haskoin.Transaction.Genesis
-- Copyright   : No rights reserved
-- License     : UNLICENSE
-- Maintainer  : jprupp@protonmail.ch
-- Stability   : experimental
-- Portability : POSIX
--
-- Code related to transactions parsing and serialization.
module Haskoin.Transaction.Genesis (genesisTx) where

import Crypto.Secp256k1 (Ctx, importPubKey)
import Data.Bytes.Get (runGetS)
import Haskoin.Crypto.Keys.Common
import Haskoin.Script.Standard
import Haskoin.Transaction.Common
import Haskoin.Util

-- | Transaction from Genesis block.
genesisTx :: Ctx -> Tx
genesisTx ctx =
  Tx 1 [txin] [txout] [] locktime
  where
    txin = TxIn outpoint inputBS maxBound
    txout = TxOut 5000000000 (marshal ctx output)
    locktime = 0
    outpoint = OutPoint z maxBound
    Just inputBS =
      decodeHex
        "04ffff001d0104455468652054696d65732030332f4a616e2f323030392043686\
        \16e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f\
        \757420666f722062616e6b73"
    Just pubKeyBS =
      decodeHex
        "04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb\
        \649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f"
    Right pubKey =
      unmarshal ctx pubKeyBS
    output = PayPK pubKey
    z = "0000000000000000000000000000000000000000000000000000000000000000"