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protocol: switch to single-funder anchor model.

Browse Source 
Most complex change was gather_updates(), which handles all the "what
is the current state of the channel" logic for our dumb test utils.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2015-07-29 16:14:28 +09:30
parent 2255cb749d
commit eac3af06f1
35 changed files with 1078 additions and 1608 deletions
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59
test-cli/create-commit-tx.c
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@@ -5,7 +5,6 @@
#include <ccan/str/hex/hex.h>
#include <ccan/err/err.h>
#include "lightning.pb-c.h"
#include "anchor.h"
#include "bitcoin/base58.h"
#include "pkt.h"
#include "bitcoin/script.h"
@@ -16,6 +15,7 @@
#include "bitcoin/privkey.h"
#include "find_p2sh_out.h"
#include "protobuf_convert.h"
#include "gather_updates.h"
#include <unistd.h>
/* FIXME: this code doesn't work if we're not the ones proposing the delta */
@@ -23,34 +23,31 @@ int main(int argc, char *argv[])
{
const tal_t *ctx = tal_arr(NULL, char, 0);
OpenChannel *o1, *o2;
Pkt *pkt;
struct bitcoin_tx *anchor, *commit;
struct sha256_double anchor_txid;
OpenAnchor *a;
struct bitcoin_tx *commit;
struct privkey privkey;
bool testnet;
struct bitcoin_signature sig1, sig2;
size_t i;
struct pubkey pubkey1, pubkey2;
u8 *redeemscript;
int64_t delta;
uint64_t our_amount, their_amount;
struct sha256 rhash;
err_set_progname(argv[0]);
opt_register_noarg("--help|-h", opt_usage_and_exit,
"<anchor-tx> <open-channel-file1> <open-channel-file2> <commit-privkey> [final-update-accept|open-commit-sig] [<updates>]\n"
"<open-channel-file1> <open-channel-file2> <open-anchor-file> <commit-privkey> [<updates>]\n"
"Create the signature needed for the commit transaction",
"Print this message.");
opt_parse(&argc, argv, opt_log_stderr_exit);
if (argc < 6)
opt_usage_exit_fail("Expected 5+ arguments");
if (argc < 5)
opt_usage_exit_fail("Expected 4+ arguments");
anchor = bitcoin_tx_from_file(ctx, argv[1]);
bitcoin_txid(anchor, &anchor_txid);
o1 = pkt_from_file(argv[2], PKT__PKT_OPEN)->open;
o2 = pkt_from_file(argv[3], PKT__PKT_OPEN)->open;
o1 = pkt_from_file(argv[1], PKT__PKT_OPEN)->open;
o2 = pkt_from_file(argv[2], PKT__PKT_OPEN)->open;
a = pkt_from_file(argv[3], PKT__PKT_OPEN_ANCHOR)->open_anchor;
if (!key_from_base58(argv[4], strlen(argv[4]), &testnet, &privkey, &pubkey1))
errx(1, "Invalid private key '%s'", argv[4]);
@@ -66,49 +63,27 @@ int main(int argc, char *argv[])
if (!proto_to_pubkey(o2->commit_key, &pubkey2))
errx(1, "Invalid o2 commit pubkey");
/* Their signature comes from open-commit or from update-accept. */
sig2.stype = SIGHASH_ALL;
pkt = any_pkt_from_file(argv[5]);
switch (pkt->pkt_case) {
case PKT__PKT_UPDATE_ACCEPT:
if (!proto_to_signature(pkt->update_accept->sig, &sig2.sig))
errx(1, "Invalid update-accept sig");
break;
case PKT__PKT_OPEN_COMMIT_SIG:
if (!proto_to_signature(pkt->open_commit_sig->sig, &sig2.sig))
errx(1, "Invalid open-commit-sig sig");
break;
default:
errx(1, "Unexpected packet type %u in %s",
pkt->pkt_case, argv[5]);
}
gather_updates(o1, o2, a, argv + 5, &our_amount, &their_amount,
&rhash, NULL, &sig2.sig);
/* Initial revocation hash comes from open. */
proto_to_sha256(o1->revocation_hash, &rhash);
delta = 0;
/* Figure out cumulative delta since anchor, update revocation hash */
for (i = 6; i < argc; i++) {
Update *u = pkt_from_file(argv[i], PKT__PKT_UPDATE)->update;
delta += u->delta;
proto_to_sha256(u->revocation_hash, &rhash);
}
redeemscript = bitcoin_redeem_2of2(ctx, &pubkey1, &pubkey2);
/* Now create commitment tx to spend 2/2 output of anchor. */
commit = create_commit_tx(ctx, o1, o2, &rhash, delta, &anchor_txid,
find_p2sh_out(anchor, redeemscript));
commit = create_commit_tx(ctx, o1, o2, a, &rhash,
our_amount, their_amount);
/* If contributions don't exceed fees, this fails. */
/* This only fails on malformed packets */
if (!commit)
errx(1, "Bad commit amounts");
errx(1, "Malformed packets");
/* We generate our signature. */
sig1.stype = SIGHASH_ALL;
sign_tx_input(ctx, commit, 0, redeemscript, tal_count(redeemscript),
&privkey, &pubkey1, &sig1.sig);
/* Check it works with theirs... */
if (!check_2of2_sig(commit, 0, redeemscript, tal_count(redeemscript),
&pubkey1, &pubkey2, &sig1, &sig2))
errx(1, "Signature failed");