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e30c835f72
This is proposed to be added to bolt 12, so we need a type to represent it. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
#include "config.h"
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#include <assert.h>
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#include <common/node_id.h>
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#include <common/sciddir_or_pubkey.h>
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#include <wire/wire.h>
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/* BOLT-sciddir_or_pubkey #1:
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* * `sciddir_or_pubkey`: either 9 or 33 bytes referencing or identifying a node, respectively
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* * if the first byte is 0 or 1, then an 8-byte `short_channel_id` follows for a total of 9 bytes
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* * 0 for the first byte indicates this refers to `node_id_1` in the `channel_announcement` for `short_channel_id` (see [BOLT #7](07-routing-gossip.md#the-channel_announcement-message))
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* * 1 for the first byte indicates this refers to `node_id_2` in the `channel_announcement` for `short_channel_id` (see [BOLT #7](07-routing-gossip.md#the-channel_announcement-message))
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* * if the first byte is 2 or 3, then the value is a 33-byte `point`
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*/
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void towire_sciddir_or_pubkey(u8 **pptr,
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const struct sciddir_or_pubkey *sciddpk)
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{
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if (sciddpk->is_pubkey)
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towire_pubkey(pptr, &sciddpk->pubkey);
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else {
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assert(sciddpk->scidd.dir == 0 || sciddpk->scidd.dir == 1);
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towire_u8(pptr, sciddpk->scidd.dir);
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towire_short_channel_id(pptr, sciddpk->scidd.scid);
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}
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}
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void fromwire_sciddir_or_pubkey(const u8 **cursor, size_t *max,
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struct sciddir_or_pubkey *sciddpk)
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{
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const u8 *peek = *cursor;
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size_t peek_max = *max;
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u8 firstbyte = fromwire_u8(&peek, &peek_max);
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if (firstbyte == 0 || firstbyte == 1) {
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sciddpk->is_pubkey = false;
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sciddpk->scidd.dir = fromwire_u8(cursor, max);
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sciddpk->scidd.scid = fromwire_short_channel_id(cursor, max);
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} else {
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sciddpk->is_pubkey = true;
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fromwire_pubkey(cursor, max, &sciddpk->pubkey);
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}
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}
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void sciddir_or_pubkey_from_pubkey(struct sciddir_or_pubkey *sciddpk,
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const struct pubkey *pubkey)
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{
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sciddpk->is_pubkey = true;
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sciddpk->pubkey = *pubkey;
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}
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bool sciddir_or_pubkey_from_node_id(struct sciddir_or_pubkey *sciddpk,
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const struct node_id *node_id)
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{
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sciddpk->is_pubkey = true;
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return pubkey_from_node_id(&sciddpk->pubkey, node_id);
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}
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void sciddir_or_pubkey_from_scidd(struct sciddir_or_pubkey *sciddpk,
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const struct short_channel_id_dir *scidd)
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{
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sciddpk->is_pubkey = false;
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sciddpk->scidd = *scidd;
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assert(sciddpk->scidd.dir == 0 || sciddpk->scidd.dir == 1);
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}
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const char *fmt_sciddir_or_pubkey(const tal_t *ctx,
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const struct sciddir_or_pubkey *sciddpk)
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{
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if (sciddpk->is_pubkey)
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return fmt_pubkey(ctx, &sciddpk->pubkey);
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return fmt_short_channel_id_dir(ctx, &sciddpk->scidd);
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}
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