chips/src/keystore.cpp at master · https-github-com-goodman-ops/chips · GitHub

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// Distributed under the MIT software license, see the accompanying

// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include <keystore.h>

#include <util.h>

void CBasicKeyStore::ImplicitlyLearnRelatedKeyScripts(const CPubKey& pubkey)

{

AssertLockHeld(cs_KeyStore);

CKeyID key_id = pubkey.GetID();

// We must actually know about this key already.

assert(HaveKey(key_id) || mapWatchKeys.count(key_id));

// This adds the redeemscripts necessary to detect P2WPKH and P2SH-P2WPKH

// outputs. Technically P2WPKH outputs don't have a redeemscript to be

// spent. However, our current IsMine logic requires the corresponding

// P2SH-P2WPKH redeemscript to be present in the wallet in order to accept

// payment even to P2WPKH outputs.

// Also note that having superfluous scripts in the keystore never hurts.

// They're only used to guide recursion in signing and IsMine logic - if

// a script is present but we can't do anything with it, it has no effect.

// "Implicitly" refers to fact that scripts are derived automatically from

// existing keys, and are present in memory, even without being explicitly

// loaded (e.g. from a file).

if (pubkey.IsCompressed()) {

CScript script = GetScriptForDestination(WitnessV0KeyHash(key_id));

// This does not use AddCScript, as it may be overridden.

CScriptID id(script);

mapScripts[id] = std::move(script);

}

bool CBasicKeyStore::GetPubKey(const CKeyID &address, CPubKey &vchPubKeyOut) const

{

CKey key;

if (!GetKey(address, key)) {

LOCK(cs_KeyStore);

WatchKeyMap::const_iterator it = mapWatchKeys.find(address);

if (it != mapWatchKeys.end()) {

vchPubKeyOut = it->second;

return true;

}

return false;

}

vchPubKeyOut = key.GetPubKey();

return true;

}

bool CBasicKeyStore::AddKeyPubKey(const CKey& key, const CPubKey &pubkey)

{

LOCK(cs_KeyStore);

mapKeys[pubkey.GetID()] = key;

ImplicitlyLearnRelatedKeyScripts(pubkey);

return true;

}

bool CBasicKeyStore::HaveKey(const CKeyID &address) const

{

LOCK(cs_KeyStore);

return mapKeys.count(address) > 0;

}

std::set<CKeyID> CBasicKeyStore::GetKeys() const

{

LOCK(cs_KeyStore);

std::set<CKeyID> set_address;

for (const auto& mi : mapKeys) {

set_address.insert(mi.first);

}

return set_address;

}

bool CBasicKeyStore::GetKey(const CKeyID &address, CKey &keyOut) const

{

LOCK(cs_KeyStore);

KeyMap::const_iterator mi = mapKeys.find(address);

if (mi != mapKeys.end()) {

keyOut = mi->second;

return true;

}

return false;

}

bool CBasicKeyStore::AddCScript(const CScript& redeemScript)

{

if (redeemScript.size() > MAX_SCRIPT_ELEMENT_SIZE)

return error("CBasicKeyStore::AddCScript(): redeemScripts > %i bytes are invalid", MAX_SCRIPT_ELEMENT_SIZE);

LOCK(cs_KeyStore);

mapScripts[CScriptID(redeemScript)] = redeemScript;

return true;

}

bool CBasicKeyStore::HaveCScript(const CScriptID& hash) const

{

LOCK(cs_KeyStore);

return mapScripts.count(hash) > 0;

}

std::set<CScriptID> CBasicKeyStore::GetCScripts() const

{

LOCK(cs_KeyStore);

std::set<CScriptID> set_script;

for (const auto& mi : mapScripts) {

set_script.insert(mi.first);

}

return set_script;

}

bool CBasicKeyStore::GetCScript(const CScriptID &hash, CScript& redeemScriptOut) const

{

LOCK(cs_KeyStore);

ScriptMap::const_iterator mi = mapScripts.find(hash);

if (mi != mapScripts.end())

{

redeemScriptOut = (*mi).second;

return true;

}

return false;

}

static bool ExtractPubKey(const CScript &dest, CPubKey& pubKeyOut)

{

//TODO: Use Solver to extract this?

CScript::const_iterator pc = dest.begin();

opcodetype opcode;

std::vector<unsigned char> vch;

if (!dest.GetOp(pc, opcode, vch) || vch.size() < 33 || vch.size() > 65)

return false;

pubKeyOut = CPubKey(vch);

if (!pubKeyOut.IsFullyValid())

return false;

if (!dest.GetOp(pc, opcode, vch) || opcode != OP_CHECKSIG || dest.GetOp(pc, opcode, vch))

return false;

return true;

}

bool CBasicKeyStore::AddWatchOnly(const CScript &dest)

{

LOCK(cs_KeyStore);

setWatchOnly.insert(dest);

CPubKey pubKey;

if (ExtractPubKey(dest, pubKey)) {

mapWatchKeys[pubKey.GetID()] = pubKey;

ImplicitlyLearnRelatedKeyScripts(pubKey);

}

return true;

}

bool CBasicKeyStore::RemoveWatchOnly(const CScript &dest)

{

LOCK(cs_KeyStore);

setWatchOnly.erase(dest);

CPubKey pubKey;

if (ExtractPubKey(dest, pubKey)) {

mapWatchKeys.erase(pubKey.GetID());

}

// Related CScripts are not removed; having superfluous scripts around is

// harmless (see comment in ImplicitlyLearnRelatedKeyScripts).

return true;

}

bool CBasicKeyStore::HaveWatchOnly(const CScript &dest) const

{

LOCK(cs_KeyStore);

return setWatchOnly.count(dest) > 0;

}

bool CBasicKeyStore::HaveWatchOnly() const

{

LOCK(cs_KeyStore);

return (!setWatchOnly.empty());

}

CKeyID GetKeyForDestination(const CKeyStore& store, const CTxDestination& dest)

{

// Only supports destinations which map to single public keys, i.e. P2PKH,

// P2WPKH, and P2SH-P2WPKH.

if (auto id = boost::get<CKeyID>(&dest)) {

return *id;

}

if (auto witness_id = boost::get<WitnessV0KeyHash>(&dest)) {

return CKeyID(*witness_id);

}

if (auto script_id = boost::get<CScriptID>(&dest)) {

CScript script;

CTxDestination inner_dest;

if (store.GetCScript(*script_id, script) && ExtractDestination(script, inner_dest)) {

if (auto inner_witness_id = boost::get<WitnessV0KeyHash>(&inner_dest)) {

return CKeyID(*inner_witness_id);

}

return CKeyID();

}

chips/src/keystore.cpp at master · https-github-com-goodman-ops/chips · GitHub

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