Function steal_htlc_tx

onchaind/onchaind.c:1118–1161

BOLT #5: * * - MUST *resolve* the _remote node's HTLC-timeout transaction_ by spending it * using the revocation private key. * - MUST *resolve* the _remote node's HTLC-success transaction_ by spending it * using the revocation private key. */

 *     using the revocation private key.
 */
static void steal_htlc_tx(struct tracked_output *out,
			  struct tracked_output ***outs,
			  const struct tx_parts *htlc_tx,
			  u32 htlc_tx_blockheight,
			  enum tx_type htlc_tx_type,
			  const struct bitcoin_outpoint *htlc_outpoint)
{
	struct tracked_output *htlc_out;
	struct amount_asset asset;
	struct amount_sat htlc_out_amt;
	const u8 *msg;

	u8 *wscript = bitcoin_wscript_htlc_tx(htlc_tx, to_self_delay[REMOTE],
					      &keyset->self_revocation_key,
					      &keyset->self_delayed_payment_key);

	asset = wally_tx_output_get_amount(htlc_tx->outputs[htlc_outpoint->n]);
	assert(amount_asset_is_main(&asset));
	htlc_out_amt = amount_asset_to_sat(&asset);

	htlc_out = new_tracked_output(outs,
				      htlc_outpoint, htlc_tx_blockheight,
				      htlc_tx_type,
				      htlc_out_amt,
				      DELAYED_CHEAT_OUTPUT_TO_THEM,
				      &out->htlc, wscript, NULL);

	/* mark commitment tx htlc output as 'resolved by them' */
	resolved_by_other(out, &htlc_tx->txid, htlc_tx_type);

	/* BOLT #3:
	 *
	 * To spend this via penalty, the remote node uses a witness stack
	 * `<revocationsig> 1`
	 */
	msg = towire_onchaind_spend_penalty(NULL,
					    htlc_outpoint, htlc_out_amt,
					    remote_per_commitment_secret,
					    tal_dup(tmpctx, u8, &ONE),
					    htlc_out->wscript);

	/* Spend this immediately. */
	propose_immediate_resolution(htlc_out, take(msg), OUR_PENALTY_TX);
}

static void onchain_annotate_txout(const struct bitcoin_outpoint *outpoint,
				   enum wallet_tx_type type)