From ca2a46a8575d66d529accb1ce3aaf97be8f37e2f Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Tue, 12 Dec 2017 21:54:14 +0100
Subject: precompute speculative signature for payment

---
 src/crypto/cryptoApi.ts    |  4 ++--
 src/crypto/cryptoWorker.ts | 11 +++++++++--
 2 files changed, 11 insertions(+), 4 deletions(-)

(limited to 'src/crypto')

diff --git a/src/crypto/cryptoApi.ts b/src/crypto/cryptoApi.ts
index 94083d622..d0ba6ada8 100644
--- a/src/crypto/cryptoApi.ts
+++ b/src/crypto/cryptoApi.ts
@@ -275,8 +275,8 @@ export class CryptoApi {
     return this.doRpc<boolean>("isValidWireFee", 2, type, wf, masterPub);
   }
 
-  isValidPaymentSignature(sig: string, contractHash: string, merchantPub: string) {
-    return this.doRpc<PayCoinInfo>("isValidPaymentSignature", 1, sig, contractHash, merchantPub);
+  isValidPaymentSignature(sig: string, contractHash: string, merchantPub: string): Promise<boolean> {
+    return this.doRpc<boolean>("isValidPaymentSignature", 1, sig, contractHash, merchantPub);
   }
 
   signDeposit(contractTerms: ContractTerms,
diff --git a/src/crypto/cryptoWorker.ts b/src/crypto/cryptoWorker.ts
index 92947d039..28634b234 100644
--- a/src/crypto/cryptoWorker.ts
+++ b/src/crypto/cryptoWorker.ts
@@ -261,7 +261,11 @@ namespace RpcFunctions {
    */
   export function signDeposit(contractTerms: ContractTerms,
                               cds: CoinWithDenom[]): PayCoinInfo {
-    const ret: PayCoinInfo = [];
+    const ret: PayCoinInfo = {
+      originalCoins: [],
+      updatedCoins: [],
+      sigs: [],
+    };
 
     const contractTermsHash = hashString(canonicalJson(contractTerms));
 
@@ -275,6 +279,7 @@ namespace RpcFunctions {
     const amountRemaining = new native.Amount(total);
     for (const cd of cds) {
       let coinSpend: Amount;
+      const originalCoin = { ...(cd.coin) };
 
       if (amountRemaining.value === 0 && amountRemaining.fraction === 0) {
         break;
@@ -324,7 +329,9 @@ namespace RpcFunctions {
         f: coinSpend.toJson(),
         ub_sig: cd.coin.denomSig,
       };
-      ret.push({sig: s, updatedCoin: cd.coin});
+      ret.sigs.push(s);
+      ret.updatedCoins.push(cd.coin);
+      ret.originalCoins.push(originalCoin);
     }
     return ret;
   }
-- 
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