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bitcoin/script: support variants where we only have the ripemd.

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For space saving, we only keep the ripemd160 for old HTLCs.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2017-08-18 14:13:53 +09:30
parent edd27d21b5
commit af9d763763
2 changed files with 57 additions and 15 deletions
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58
bitcoin/script.c
View File

@@ -708,11 +708,11 @@ u8 **bitcoin_to_local_spend_revocation(const tal_t *ctx,
* OP_ENDIF
* OP_ENDIF
*/
u8 *bitcoin_wscript_htlc_offer(const tal_t *ctx,
const struct pubkey *localkey,
const struct pubkey *remotekey,
const struct sha256 *payment_hash,
const struct pubkey *revocationkey)
u8 *bitcoin_wscript_htlc_offer_ripemd160(const tal_t *ctx,
const struct pubkey *localkey,
const struct pubkey *remotekey,
const struct ripemd160 *payment_ripemd,
const struct pubkey *revocationkey)
{
u8 *script = tal_arr(ctx, u8, 0);
struct ripemd160 ripemd;
@@ -739,8 +739,8 @@ u8 *bitcoin_wscript_htlc_offer(const tal_t *ctx,
add_op(&script, OP_CHECKMULTISIG);
add_op(&script, OP_ELSE);
add_op(&script, OP_HASH160);
ripemd160(&ripemd, payment_hash->u.u8, sizeof(payment_hash->u));
add_push_bytes(&script, ripemd.u.u8, sizeof(ripemd.u.u8));
add_push_bytes(&script,
payment_ripemd->u.u8, sizeof(payment_ripemd->u.u8));
add_op(&script, OP_EQUALVERIFY);
add_op(&script, OP_CHECKSIG);
add_op(&script, OP_ENDIF);
@@ -749,6 +749,19 @@ u8 *bitcoin_wscript_htlc_offer(const tal_t *ctx,
return script;
}
u8 *bitcoin_wscript_htlc_offer(const tal_t *ctx,
const struct pubkey *localkey,
const struct pubkey *remotekey,
const struct sha256 *payment_hash,
const struct pubkey *revocationkey)
{
struct ripemd160 ripemd;
ripemd160(&ripemd, payment_hash->u.u8, sizeof(payment_hash->u));
return bitcoin_wscript_htlc_offer_ripemd160(ctx, localkey, remotekey,
&ripemd, revocationkey);
}
/* BOLT #3:
*
* #### Received HTLC Outputs
@@ -775,12 +788,12 @@ u8 *bitcoin_wscript_htlc_offer(const tal_t *ctx,
* OP_ENDIF
* OP_ENDIF
*/
u8 *bitcoin_wscript_htlc_receive(const tal_t *ctx,
const struct abs_locktime *htlc_abstimeout,
const struct pubkey *localkey,
const struct pubkey *remotekey,
const struct sha256 *payment_hash,
const struct pubkey *revocationkey)
u8 *bitcoin_wscript_htlc_receive_ripemd(const tal_t *ctx,
const struct abs_locktime *htlc_abstimeout,
const struct pubkey *localkey,
const struct pubkey *remotekey,
const struct ripemd160 *payment_ripemd,
const struct pubkey *revocationkey)
{
u8 *script = tal_arr(ctx, u8, 0);
struct ripemd160 ripemd;
@@ -800,8 +813,8 @@ u8 *bitcoin_wscript_htlc_receive(const tal_t *ctx,
add_op(&script, OP_EQUAL);
add_op(&script, OP_IF);
add_op(&script, OP_HASH160);
ripemd160(&ripemd, payment_hash->u.u8, sizeof(payment_hash->u));
add_push_bytes(&script, ripemd.u.u8, sizeof(ripemd.u.u8));
add_push_bytes(&script,
payment_ripemd->u.u8, sizeof(payment_ripemd->u.u8));
add_op(&script, OP_EQUALVERIFY);
add_number(&script, 2);
add_op(&script, OP_SWAP);
@@ -820,6 +833,21 @@ u8 *bitcoin_wscript_htlc_receive(const tal_t *ctx,
return script;
}
u8 *bitcoin_wscript_htlc_receive(const tal_t *ctx,
const struct abs_locktime *htlc_abstimeout,
const struct pubkey *localkey,
const struct pubkey *remotekey,
const struct sha256 *payment_hash,
const struct pubkey *revocationkey)
{
struct ripemd160 ripemd;
ripemd160(&ripemd, payment_hash->u.u8, sizeof(payment_hash->u));
return bitcoin_wscript_htlc_receive_ripemd(ctx, htlc_abstimeout,
localkey, remotekey,
&ripemd, revocationkey);
}
/* BOLT #3:
*
* ## HTLC-Timeout and HTLC-Success Transactions

14
bitcoin/script.h
View File

@@ -11,6 +11,7 @@ struct bitcoin_tx_input;
struct preimage;
struct pubkey;
struct sha256;
struct ripemd160;
struct rel_locktime;
struct abs_locktime;
@@ -141,6 +142,19 @@ u8 **bitcoin_htlc_receive_spend_preimage(const tal_t *ctx,
const struct preimage *preimage,
const u8 *wscript);
/* Underlying functions for penalties, where we only keep ripemd160 */
u8 *bitcoin_wscript_htlc_offer_ripemd160(const tal_t *ctx,
const struct pubkey *localkey,
const struct pubkey *remotekey,
const struct ripemd160 *payment_ripemd,
const struct pubkey *revocationkey);
u8 *bitcoin_wscript_htlc_receive_ripemd(const tal_t *ctx,
const struct abs_locktime *htlc_abstimeout,
const struct pubkey *localkey,
const struct pubkey *remotekey,
const struct ripemd160 *payment_ripemd,
const struct pubkey *revocationkey);
/* BOLT #3 HTLC-success/HTLC-timeout output */
u8 *bitcoin_wscript_htlc_tx(const tal_t *ctx,
u16 to_self_delay,