2020-05-15 12:29:53 +02:00
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#ifndef LIGHTNING_COMMON_CHANNEL_ID_H
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#define LIGHTNING_COMMON_CHANNEL_ID_H
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#include "config.h"
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#include <ccan/short_types/short_types.h>
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#include <ccan/structeq/structeq.h>
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2021-10-13 05:45:36 +02:00
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struct bitcoin_outpoint;
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2020-09-09 09:20:53 +02:00
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struct pubkey;
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2020-05-15 12:29:53 +02:00
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/* BOLT #2:
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*
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* This message introduces the `channel_id` to identify the channel. It's
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* derived from the funding transaction by combining the `funding_txid` and
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* the `funding_output_index`, using big-endian exclusive-OR
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* (i.e. `funding_output_index` alters the last 2 bytes).
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*/
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struct channel_id {
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u8 id[32];
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};
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/* Define channel_id_eq (no padding) */
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STRUCTEQ_DEF(channel_id, 0, id);
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2021-03-03 21:07:32 +01:00
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/* For v1 channel establishment */
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2020-05-15 12:29:53 +02:00
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void derive_channel_id(struct channel_id *channel_id,
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2021-10-13 05:45:36 +02:00
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const struct bitcoin_outpoint *outpoint);
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2020-05-15 12:29:53 +02:00
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2021-03-03 21:07:32 +01:00
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/* For v1 channel establishment */
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void temporary_channel_id(struct channel_id *channel_id);
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/* For v2 channel establishment */
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2020-09-09 09:20:53 +02:00
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void derive_channel_id_v2(struct channel_id *channel_id,
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const struct pubkey *basepoint_1,
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const struct pubkey *basepoint_2);
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2020-12-10 20:52:29 +01:00
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2021-03-03 21:07:32 +01:00
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/* For v2 channel establishment */
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void derive_tmp_channel_id(struct channel_id *channel_id,
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const struct pubkey *opener_basepoint);
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2020-05-15 12:29:53 +02:00
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/* Marshalling/unmarshalling functions */
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void towire_channel_id(u8 **pptr, const struct channel_id *channel_id);
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void fromwire_channel_id(const u8 **cursor, size_t *max,
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struct channel_id *channel_id);
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#endif /* LIGHTNING_COMMON_CHANNEL_ID_H */
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