Function check_balances

openingd/dualopend.c:676–986

}

static char *check_balances(const tal_t *ctx,
			    struct state *state,
			    struct tx_state *tx_state,
			    struct wally_psbt *psbt,
			    u32 feerate_per_kw_funding)
{
	struct amount_sat initiator_inputs, initiator_outs,
		accepter_inputs, accepter_outs,
		tot_input_amt, tot_output_amt,
		initiator_fee, accepter_fee,
		initiator_diff, accepter_diff;

	bool ok;
	u32 funding_outnum = psbt->num_outputs;
	size_t accepter_weight = 0;


	/* BOLT #2:
	 *
	 * The *initiator* is responsible for paying the fees for the
	 * following fields, to be referred to as the `common fields`.
	 *   - version
	 *   - segwit marker + flag
	 *   - input count
	 *   - output count
	 *   - locktime
	 */
	size_t initiator_weight =
		bitcoin_tx_core_weight(psbt->num_inputs,
				       psbt->num_outputs);

	u8 *funding_wscript =
		bitcoin_redeem_2of2(tmpctx,
				    &state->our_funding_pubkey,
				    &state->their_funding_pubkey);

	/*
	 * BOLT #2:
	 * The receiving node: ...
	 * - MUST fail the negotiation if: ...
	 *  - there are more than 252 inputs
	 */
	if (tx_state->psbt->num_inputs > MAX_FUNDING_INPUTS)
		return tal_fmt(ctx,
			       "Too many inputs. Have %zu,"
			       " Max allowed %u",
			       tx_state->psbt->num_inputs,
			       MAX_FUNDING_INPUTS);
	/*
	 * BOLT #2:
	 * The receiving node: ...
	 * - MUST fail the negotiation if: ...
	 *  - there are more than 252 outputs
	 */
	if (tx_state->psbt->num_outputs > MAX_FUNDING_OUTPUTS)
		return tal_fmt(ctx, "Too many inputs. Have %zu,"
			       " Max allowed %u",
			       tx_state->psbt->num_outputs,