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1df206f
Disallow using addresses in createmultisig (Andrew Chow)
Pull request description:
This PR should be the last part of #7965.
This PR makes createmultisig only accept public keys and marks the old functionality of accepting addresses as deprecated.
It also splits `_createmultisig_redeemscript` into two functions, `_createmultisig_getpubkeys` and `_createmultisig_getaddr_pubkeys`. `_createmultisig_getpubkeys` retrieves public keys from the RPC parameters and `_createmultisig_getaddr_pubkeys` retrieves addresses' public keys from the wallet. `_createmultisig_getaddr_pubkeys` requires the wallet and is only used by `addwitnessaddress` (except when `createmultisig` is used in deprecated mode).
`addwitnessaddress`'s API is also changed. Instead of returning just an address, it now returns the same thing as `createmultisig`: a JSON object with two fields, address and redeemscript.
Tree-SHA512: a5796e41935ad5e47d8165ff996a8b20d5112b5fc1a06a6d3c7f5513c13e7628a4fd37ec30fde05d8b15abfed51bc250710140f6834b13f64d0a0e47a3817969
0.16
Wladimir J. van der Laan
7 years ago
15 changed files with 204 additions and 126 deletions
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// Copyright (c) 2017 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <base58.h> |
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#include <keystore.h> |
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#include <pubkey.h> |
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#include <rpc/protocol.h> |
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#include <rpc/util.h> |
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#include <tinyformat.h> |
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#include <utilstrencodings.h> |
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// Converts a hex string to a public key if possible
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CPubKey HexToPubKey(const std::string& hex_in) |
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{ |
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if (!IsHex(hex_in)) { |
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throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid public key: " + hex_in); |
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} |
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CPubKey vchPubKey(ParseHex(hex_in)); |
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if (!vchPubKey.IsFullyValid()) { |
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throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid public key: " + hex_in); |
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} |
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return vchPubKey; |
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} |
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// Retrieves a public key for an address from the given CKeyStore
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CPubKey AddrToPubKey(CKeyStore* const keystore, const std::string& addr_in) |
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{ |
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CTxDestination dest = DecodeDestination(addr_in); |
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if (!IsValidDestination(dest)) { |
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throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid address: " + addr_in); |
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} |
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CKeyID key = GetKeyForDestination(*keystore, dest); |
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if (key.IsNull()) { |
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throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, strprintf("%s does not refer to a key", addr_in)); |
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} |
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CPubKey vchPubKey; |
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if (!keystore->GetPubKey(key, vchPubKey)) { |
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throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, strprintf("no full public key for address %s", addr_in)); |
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} |
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if (!vchPubKey.IsFullyValid()) { |
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throw JSONRPCError(RPC_INTERNAL_ERROR, "Wallet contains an invalid public key"); |
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} |
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return vchPubKey; |
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} |
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// Creates a multisig redeemscript from a given list of public keys and number required.
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CScript CreateMultisigRedeemscript(const int required, const std::vector<CPubKey>& pubkeys) |
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{ |
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// Gather public keys
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if (required < 1) { |
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throw JSONRPCError(RPC_INVALID_PARAMETER, "a multisignature address must require at least one key to redeem"); |
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} |
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if ((int)pubkeys.size() < required) { |
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throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("not enough keys supplied (got %u keys, but need at least %d to redeem)", pubkeys.size(), required)); |
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} |
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if (pubkeys.size() > 16) { |
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throw JSONRPCError(RPC_INVALID_PARAMETER, "Number of keys involved in the multisignature address creation > 16\nReduce the number"); |
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} |
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CScript result = GetScriptForMultisig(required, pubkeys); |
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if (result.size() > MAX_SCRIPT_ELEMENT_SIZE) { |
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throw JSONRPCError(RPC_INVALID_PARAMETER, (strprintf("redeemScript exceeds size limit: %d > %d", result.size(), MAX_SCRIPT_ELEMENT_SIZE))); |
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} |
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return result; |
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} |
@ -0,0 +1,19 @@ |
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// Copyright (c) 2017 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_RPC_UTIL_H |
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#define BITCOIN_RPC_UTIL_H |
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#include <string> |
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#include <vector> |
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class CKeyStore; |
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class CPubKey; |
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class CScript; |
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CPubKey HexToPubKey(const std::string& hex_in); |
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CPubKey AddrToPubKey(CKeyStore* const keystore, const std::string& addr_in); |
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CScript CreateMultisigRedeemscript(const int required, const std::vector<CPubKey>& pubkeys); |
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#endif // BITCOIN_RPC_UTIL_H
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