diff options
Diffstat (limited to 'src/script/ismine.cpp')
| -rw-r--r-- | src/script/ismine.cpp | 96 |
1 files changed, 61 insertions, 35 deletions
diff --git a/src/script/ismine.cpp b/src/script/ismine.cpp index fefa02fdef..43dd9e582e 100644 --- a/src/script/ismine.cpp +++ b/src/script/ismine.cpp @@ -28,6 +28,19 @@ enum class IsMineSigVersion WITNESS_V0 = 2 //! P2WSH witness script execution }; +/** + * This is an internal representation of isminetype + invalidity. + * Its order is significant, as we return the max of all explored + * possibilities. + */ +enum class IsMineResult +{ + NO = 0, //! Not ours + WATCH_ONLY = 1, //! Included in watch-only balance + SPENDABLE = 2, //! Included in all balances + INVALID = 3, //! Not spendable by anyone +}; + bool PermitsUncompressed(IsMineSigVersion sigversion) { return sigversion == IsMineSigVersion::TOP || sigversion == IsMineSigVersion::P2SH; @@ -42,17 +55,13 @@ bool HaveKeys(const std::vector<valtype>& pubkeys, const CKeyStore& keystore) return true; } -isminetype IsMineInner(const CKeyStore& keystore, const CScript& scriptPubKey, bool& isInvalid, IsMineSigVersion sigversion) +IsMineResult IsMineInner(const CKeyStore& keystore, const CScript& scriptPubKey, IsMineSigVersion sigversion) { - isInvalid = false; + IsMineResult ret = IsMineResult::NO; std::vector<valtype> vSolutions; txnouttype whichType; - if (!Solver(scriptPubKey, whichType, vSolutions)) { - if (keystore.HaveWatchOnly(scriptPubKey)) - return ISMINE_WATCH_UNSOLVABLE; - return ISMINE_NO; - } + Solver(scriptPubKey, whichType, vSolutions); CKeyID keyID; switch (whichType) @@ -64,23 +73,25 @@ isminetype IsMineInner(const CKeyStore& keystore, const CScript& scriptPubKey, b case TX_PUBKEY: keyID = CPubKey(vSolutions[0]).GetID(); if (!PermitsUncompressed(sigversion) && vSolutions[0].size() != 33) { - isInvalid = true; - return ISMINE_NO; + return IsMineResult::INVALID; + } + if (keystore.HaveKey(keyID)) { + ret = std::max(ret, IsMineResult::SPENDABLE); } - if (keystore.HaveKey(keyID)) - return ISMINE_SPENDABLE; break; case TX_WITNESS_V0_KEYHASH: { + if (sigversion == IsMineSigVersion::WITNESS_V0) { + // P2WPKH inside P2WSH is invalid. + return IsMineResult::INVALID; + } if (sigversion == IsMineSigVersion::TOP && !keystore.HaveCScript(CScriptID(CScript() << OP_0 << vSolutions[0]))) { // We do not support bare witness outputs unless the P2SH version of it would be // acceptable as well. This protects against matching before segwit activates. // This also applies to the P2WSH case. break; } - isminetype ret = IsMineInner(keystore, GetScriptForDestination(CKeyID(uint160(vSolutions[0]))), isInvalid, IsMineSigVersion::WITNESS_V0); - if (ret == ISMINE_SPENDABLE || ret == ISMINE_WATCH_SOLVABLE || (ret == ISMINE_NO && isInvalid)) - return ret; + ret = std::max(ret, IsMineInner(keystore, GetScriptForDestination(CKeyID(uint160(vSolutions[0]))), IsMineSigVersion::WITNESS_V0)); break; } case TX_PUBKEYHASH: @@ -88,26 +99,32 @@ isminetype IsMineInner(const CKeyStore& keystore, const CScript& scriptPubKey, b if (!PermitsUncompressed(sigversion)) { CPubKey pubkey; if (keystore.GetPubKey(keyID, pubkey) && !pubkey.IsCompressed()) { - isInvalid = true; - return ISMINE_NO; + return IsMineResult::INVALID; } } - if (keystore.HaveKey(keyID)) - return ISMINE_SPENDABLE; + if (keystore.HaveKey(keyID)) { + ret = std::max(ret, IsMineResult::SPENDABLE); + } break; case TX_SCRIPTHASH: { + if (sigversion != IsMineSigVersion::TOP) { + // P2SH inside P2WSH or P2SH is invalid. + return IsMineResult::INVALID; + } CScriptID scriptID = CScriptID(uint160(vSolutions[0])); CScript subscript; if (keystore.GetCScript(scriptID, subscript)) { - isminetype ret = IsMineInner(keystore, subscript, isInvalid, IsMineSigVersion::P2SH); - if (ret == ISMINE_SPENDABLE || ret == ISMINE_WATCH_SOLVABLE || (ret == ISMINE_NO && isInvalid)) - return ret; + ret = std::max(ret, IsMineInner(keystore, subscript, IsMineSigVersion::P2SH)); } break; } case TX_WITNESS_V0_SCRIPTHASH: { + if (sigversion == IsMineSigVersion::WITNESS_V0) { + // P2WSH inside P2WSH is invalid. + return IsMineResult::INVALID; + } if (sigversion == IsMineSigVersion::TOP && !keystore.HaveCScript(CScriptID(CScript() << OP_0 << vSolutions[0]))) { break; } @@ -116,9 +133,7 @@ isminetype IsMineInner(const CKeyStore& keystore, const CScript& scriptPubKey, b CScriptID scriptID = CScriptID(hash); CScript subscript; if (keystore.GetCScript(scriptID, subscript)) { - isminetype ret = IsMineInner(keystore, subscript, isInvalid, IsMineSigVersion::WITNESS_V0); - if (ret == ISMINE_SPENDABLE || ret == ISMINE_WATCH_SOLVABLE || (ret == ISMINE_NO && isInvalid)) - return ret; + ret = std::max(ret, IsMineInner(keystore, subscript, IsMineSigVersion::WITNESS_V0)); } break; } @@ -126,7 +141,9 @@ isminetype IsMineInner(const CKeyStore& keystore, const CScript& scriptPubKey, b case TX_MULTISIG: { // Never treat bare multisig outputs as ours (they can still be made watchonly-though) - if (sigversion == IsMineSigVersion::TOP) break; + if (sigversion == IsMineSigVersion::TOP) { + break; + } // Only consider transactions "mine" if we own ALL the // keys involved. Multi-signature transactions that are @@ -137,30 +154,39 @@ isminetype IsMineInner(const CKeyStore& keystore, const CScript& scriptPubKey, b if (!PermitsUncompressed(sigversion)) { for (size_t i = 0; i < keys.size(); i++) { if (keys[i].size() != 33) { - isInvalid = true; - return ISMINE_NO; + return IsMineResult::INVALID; } } } - if (HaveKeys(keys, keystore)) - return ISMINE_SPENDABLE; + if (HaveKeys(keys, keystore)) { + ret = std::max(ret, IsMineResult::SPENDABLE); + } break; } } - if (keystore.HaveWatchOnly(scriptPubKey)) { - // TODO: This could be optimized some by doing some work after the above solver - SignatureData sigs; - return ProduceSignature(keystore, DUMMY_SIGNATURE_CREATOR, scriptPubKey, sigs) ? ISMINE_WATCH_SOLVABLE : ISMINE_WATCH_UNSOLVABLE; + if (ret == IsMineResult::NO && keystore.HaveWatchOnly(scriptPubKey)) { + ret = std::max(ret, IsMineResult::WATCH_ONLY); } - return ISMINE_NO; + return ret; } } // namespace isminetype IsMine(const CKeyStore& keystore, const CScript& scriptPubKey, bool& isInvalid) { - return IsMineInner(keystore, scriptPubKey, isInvalid, IsMineSigVersion::TOP); + isInvalid = false; + switch (IsMineInner(keystore, scriptPubKey, IsMineSigVersion::TOP)) { + case IsMineResult::INVALID: + isInvalid = true; + case IsMineResult::NO: + return ISMINE_NO; + case IsMineResult::WATCH_ONLY: + return ISMINE_WATCH_ONLY; + case IsMineResult::SPENDABLE: + return ISMINE_SPENDABLE; + } + assert(false); } isminetype IsMine(const CKeyStore& keystore, const CScript& scriptPubKey) |