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The definition was in wire/wire.h, and helper functions in fromwire.c! Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>nifty/pset-pre
Rusty Russell
5 years ago
committed by
Christian Decker
42 changed files with 211 additions and 41 deletions
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#include <bitcoin/tx.h> |
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#include <common/channel_id.h> |
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#include <common/type_to_string.h> |
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#include <wire/wire.h> |
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void derive_channel_id(struct channel_id *channel_id, |
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const struct bitcoin_txid *txid, u16 txout) |
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{ |
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BUILD_ASSERT(sizeof(*channel_id) == sizeof(*txid)); |
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memcpy(channel_id, txid, sizeof(*channel_id)); |
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channel_id->id[sizeof(*channel_id)-2] ^= txout >> 8; |
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channel_id->id[sizeof(*channel_id)-1] ^= txout; |
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} |
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void towire_channel_id(u8 **pptr, const struct channel_id *channel_id) |
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{ |
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towire(pptr, channel_id, sizeof(*channel_id)); |
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} |
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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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{ |
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fromwire(cursor, max, channel_id, sizeof(*channel_id)); |
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} |
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REGISTER_TYPE_TO_HEXSTR(channel_id); |
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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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struct bitcoin_txid; |
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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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void derive_channel_id(struct channel_id *channel_id, |
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const struct bitcoin_txid *txid, u16 txout); |
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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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