Function towire_tlv

wire/tlvstream.c:326–374

}

void towire_tlv(u8 **pptr,
		const struct tlv_record_type *types, size_t num_types,
		const void *record)
{
	const struct tlv_field *field, *end;
	if (!record)
		return;

	/* First field is always "struct tlv_field *fields;" */
	field = first_unknown_field(*(struct tlv_field **)record, &end);

	for (size_t i = 0; i < num_types; i++) {
		u8 *val;
		if (i != 0)
			assert(types[i].type > types[i-1].type);

		/* Do any unknown fields first */
		while (field && field->numtype < types[i].type) {
			towire_bigsize(pptr, field->numtype);
			towire_bigsize(pptr, field->length);
			towire(pptr, field->value, field->length);
			field = next_unknown_field(field, end);
		}

		val = types[i].towire(NULL, record);
		if (!val)
			continue;

		/* BOLT #1:
		 *
		 * The sending node:
		 ...
		 *  - MUST minimally encode `type` and `length`.
		 */
		towire_bigsize(pptr, types[i].type);
		towire_bigsize(pptr, tal_bytelen(val));
		towire(pptr, val, tal_bytelen(val));
		tal_free(val);
	}

	/* Add any trailing unknown fields */
	while (field) {
		towire_bigsize(pptr, field->numtype);
		towire_bigsize(pptr, field->length);
		towire(pptr, field->value, field->length);
		field = next_unknown_field(field, end);
	}

}

void tlv_update_fields_(const struct tlv_record_type *types,
			size_t num_types,