aljaz/lightning
1
0
Fork 0
mirror of https://github.com/aljazceru/lightning.git synced 2026-02-09 08:04:19 +01:00
Code Issues Packages Projects Releases Wiki Activity

commit_tx: new file containing logic to create initial commitment transaction.

Browse Source 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2015-05-30 20:44:00 +09:30
parent bf38ca052e
commit c04d20e019
4 changed files with 69 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
commit_tx.c Normal file
View File

@@ -0,0 +1,45 @@
#include "commit_tx.h"
#include "shadouble.h"
#include "bitcoin_tx.h"
#include "bitcoin_script.h"
#include "permute_tx.h"
struct bitcoin_tx *create_commit_tx(const tal_t *ctx,
OpenChannel *ours,
OpenChannel *theirs,
const struct sha256_double *anchor_txid,
unsigned int anchor_output)
{
struct bitcoin_tx *tx;
const u8 *redeemscript;
/* Now create commitment tx: one input, two outputs. */
tx = bitcoin_tx(ctx, 1, 2);
/* Our input spends the anchor tx output. */
tx->input[0].txid = *anchor_txid;
tx->input[0].index = anchor_output;
/* First output is a P2SH to a complex redeem script (usu. for me) */
redeemscript = bitcoin_redeem_revocable(tx, ours->anchor->pubkey,
ours->locktime_seconds,
theirs->anchor->pubkey,
ours->revocation_hash);
tx->output[0].script = scriptpubkey_p2sh(tx, redeemscript);
tx->output[0].script_length = tal_count(tx->output[0].script);
if (ours->anchor->total < ours->commitment_fee)
return tal_free(tx);
tx->output[0].amount = ours->anchor->total - ours->commitment_fee;
/* Second output is a simple payment to them. */
tx->output[1].script = theirs->script_to_me.data;
tx->output[1].script_length = theirs->script_to_me.len;
if (theirs->anchor->total < theirs->commitment_fee)
return tal_free(tx);
tx->output[1].amount = theirs->anchor->total - theirs->commitment_fee;
permute_outputs(ours->seed, theirs->seed, 1, tx->output, 2, NULL);
return tx;
}