add convertpassphrase RPC method (convert Agama passphrases to WIF)

src/wallet/rpcdump.cpp

@@ -89,6 +89,65 @@ std::string DecodeDumpString(const std::string &str) {
     return ret.str();
 }
 
+UniValue convertpassphrase(const UniValue& params, bool fHelp)
+{
+    if (fHelp || params.size() < 1 || params.size() > 1)
+        throw runtime_error(
+            "convertpassphrase \"agamapassphrase\"\n"
+            "\nConverts Agama passphrase to a private key and WIF (for import with importprivkey).\n"
+            "\nArguments:\n"
+            "1. \"agamapassphrase\"   (string, required) Agama passphrase\n"
+            "\nResult:\n"
+            "\"agamapassphrase\": \"agamapassphrase\",   (string) Agama passphrase you entered\n"
+            "\"address\": \"komodoaddress\",             (string) Address corresponding to your passphrase\n"
+            "\"pubkey\": \"publickeyhex\",               (string) The hex value of the raw public key\n"
+            "\"privkey\": \"privatekeyhex\",             (string) The hex value of the raw private key\n"
+            "\"wif\": \"wif\"                            (string) The private key in WIF format to use with 'importprivkey'\n"
+            "\nExamples:\n"
+            + HelpExampleCli("convertpassphrase", "\"agamapassphrase\"")
+            + HelpExampleRpc("convertpassphrase", "\"agamapassphrase\"")
+        );
+
+    bool fCompressed = true;
+    string strAgamaPassphrase = params[0].get_str();
+
+    UniValue ret(UniValue::VOBJ);
+    ret.push_back(Pair("agamapassphrase", strAgamaPassphrase));
+
+    CKey tempkey = DecodeSecret(strAgamaPassphrase);
+    /* first we should check if user pass wif to method, instead of passphrase */
+    if (!tempkey.IsValid()) {
+        /* it's a passphrase, not wif */
+        uint256 sha256;
+        CSHA256().Write((const unsigned char *)strAgamaPassphrase.c_str(), strAgamaPassphrase.length()).Finalize(sha256.begin());
+        std::vector<unsigned char> privkey(sha256.begin(), sha256.begin() + sha256.size());
+        privkey.front() &= 0xf8;
+        privkey.back()  &= 0x7f;
+        privkey.back()  |= 0x40;
+        CKey key;
+        key.Set(privkey.begin(),privkey.end(), fCompressed);
+        CPubKey pubkey = key.GetPubKey();
+        assert(key.VerifyPubKey(pubkey));
+        CKeyID vchAddress = pubkey.GetID();
+
+        ret.push_back(Pair("address", EncodeDestination(vchAddress)));
+        ret.push_back(Pair("pubkey", HexStr(pubkey)));
+        ret.push_back(Pair("privkey", HexStr(privkey)));
+        ret.push_back(Pair("wif", EncodeSecret(key)));
+    } else {
+        /* seems it's a wif */
+        CPubKey pubkey = tempkey.GetPubKey();
+        assert(tempkey.VerifyPubKey(pubkey));
+        CKeyID vchAddress = pubkey.GetID();
+        ret.push_back(Pair("address", EncodeDestination(vchAddress)));
+        ret.push_back(Pair("pubkey", HexStr(pubkey)));
+        ret.push_back(Pair("privkey", HexStr(tempkey)));
+        ret.push_back(Pair("wif", strAgamaPassphrase));
+    }
+
+    return ret;
+}
+
 UniValue importprivkey(const UniValue& params, bool fHelp)
 {
     if (!EnsureWalletIsAvailable(fHelp))

src/wallet/rpcwallet.cpp

@@ -7977,6 +7977,7 @@ UniValue heirlist(const UniValue& params, bool fHelp)
 
 
 extern UniValue dumpprivkey(const UniValue& params, bool fHelp); // in rpcdump.cpp
+extern UniValue convertpassphrase(const UniValue& params, bool fHelp);
 extern UniValue importprivkey(const UniValue& params, bool fHelp);
 extern UniValue importaddress(const UniValue& params, bool fHelp);
 extern UniValue dumpwallet(const UniValue& params, bool fHelp);
@@ -8012,6 +8013,7 @@ static const CRPCCommand commands[] =
     { "wallet",             "gettransaction",           &gettransaction,           false },
     { "wallet",             "getunconfirmedbalance",    &getunconfirmedbalance,    false },
     { "wallet",             "getwalletinfo",            &getwalletinfo,            false },
+    { "wallet",             "convertpassphrase",        &convertpassphrase,        true  },
     { "wallet",             "importprivkey",            &importprivkey,            true  },
     { "wallet",             "importwallet",             &importwallet,             true  },
     { "wallet",             "importaddress",            &importaddress,            true  },