Function derive_tmp_channel_id

common/channel_id.c:57–72

}

void derive_tmp_channel_id(struct channel_id *channel_id,
			   const struct pubkey *opener_basepoint)
{
	struct sha256 sha;

	/* BOLT #2:
	 * When sending `open_channel2`, the peer's revocation basepoint is unknown.
	 * A `temporary_channel_id` must be computed by using a zeroed out basepoint
	 * for the non-initiator.
	 */
	u8 der_keys[PUBKEY_CMPR_LEN * 2];
	memset(der_keys, 0, PUBKEY_CMPR_LEN);
	pubkey_to_der(der_keys + PUBKEY_CMPR_LEN, opener_basepoint);
	sha256(&sha, der_keys, sizeof(der_keys));
	CROSS_TYPE_ASSIGNMENT(channel_id, &sha);
}

/* BOLT #2:
 *