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commit_tx: keep permutation map.

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This lets us map the HTLCs back to outputs when txs occur onchain.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2016-05-02 16:05:56 +09:30
parent 76cb195ea1
commit 7614e513bd
7 changed files with 26 additions and 17 deletions
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8
commit_tx.c
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@@ -42,7 +42,8 @@ struct bitcoin_tx *create_commit_tx(const tal_t *ctx,
unsigned int anchor_index,
u64 anchor_satoshis,
const struct sha256 *rhash,
const struct channel_state *cstate)
const struct channel_state *cstate,
int **map)
{
struct bitcoin_tx *tx;
const u8 *redeemscript;
@@ -94,7 +95,8 @@ struct bitcoin_tx *create_commit_tx(const tal_t *ctx,
}
assert(num == tx->output_count);
assert(total <= anchor_satoshis);
permute_outputs(tx->output, tx->output_count, NULL);
*map = tal_arr(ctx, int, tx->output_count);
permute_outputs(tx->output, tx->output_count, *map);
return tx;
}