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initpegoutwallet: check for hardened derivation steps early

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Gregory Sanders 2020-03-03 09:52:57 -05:00 • committed by Steven Roose
parent ed88521841
commit 32792e3dc7
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GPG key ID: 2F2A88D7F8D68E87
1 changed files with 13 additions and 10 deletions
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23
src/wallet/rpcwallet.cpp
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@ -4984,6 +4984,19 @@ UniValue initpegoutwallet(const JSONRPCRequest& request)
throw JSONRPCError(RPC_INVALID_PARAMETER, "bitcoin_descriptor must be a ranged descriptor.");
}
// Check if we can actually generate addresses(catches hardened derivation steps etc) before
// writing to cache
UniValue address_list(UniValue::VARR);
for (int i = counter; i < counter+3; i++) {
std::vector<CScript> scripts;
if (!desc->Expand(i, provider, scripts, provider)) {
throw JSONRPCError(RPC_WALLET_ERROR, "Could not generate lookahead addresses with descriptor. Are there hardened derivations after the xpub?");
}
CTxDestination destination;
ExtractDestination(scripts[0], destination);
address_list.push_back(EncodeParentDestination(destination));
}
// For our manual pattern matching, we don't want the checksum part.
auto checksum_char = bitcoin_desc.find('#');
if (checksum_char != std::string::npos) {
@ -5052,16 +5065,6 @@ UniValue initpegoutwallet(const JSONRPCRequest& request)
assert(len == 33);
assert(negatedpubkeybytes.size() == 33);
UniValue address_list(UniValue::VARR);
for (int i = counter; i < counter+3; i++) {
std::vector<CScript> scripts;
if (!desc->Expand(i, provider, scripts, provider)) {
throw JSONRPCError(RPC_WALLET_ERROR, "Could not generate lookahead addresses with descriptor. This is a bug.");
}
CTxDestination destination;
ExtractDestination(scripts[0], destination);
address_list.push_back(EncodeParentDestination(destination));
}
UniValue pak(UniValue::VOBJ);
pak.pushKV("pakentry", "pak=" + HexStr(negatedpubkeybytes) + ":" + HexStr(online_pubkey));
pak.pushKV("liquid_pak", HexStr(online_pubkey));