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       1                 :             : // Copyright (c) 2009-2010 Satoshi Nakamoto
       2                 :             : // Copyright (c) 2009-present The Bitcoin Core developers
       3                 :             : // Distributed under the MIT software license, see the accompanying
       4                 :             : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
       5                 :             : 
       6                 :             : #include <outputtype.h>
       7                 :             : 
       8                 :             : #include <pubkey.h>
       9                 :             : #include <script/script.h>
      10                 :             : #include <script/sign.h>
      11                 :             : #include <script/signingprovider.h>
      12                 :             : 
      13                 :             : #include <cassert>
      14                 :             : #include <optional>
      15                 :             : #include <string>
      16                 :             : 
      17                 :             : static const std::string OUTPUT_TYPE_STRING_LEGACY = "legacy";
      18                 :             : static const std::string OUTPUT_TYPE_STRING_P2SH_SEGWIT = "p2sh-segwit";
      19                 :             : static const std::string OUTPUT_TYPE_STRING_BECH32 = "bech32";
      20                 :             : static const std::string OUTPUT_TYPE_STRING_BECH32M = "bech32m";
      21                 :             : static const std::string OUTPUT_TYPE_STRING_UNKNOWN = "unknown";
      22                 :             : 
      23                 :        1287 : std::optional<OutputType> ParseOutputType(const std::string& type)
      24                 :             : {
      25         [ +  + ]:        1287 :     if (type == OUTPUT_TYPE_STRING_LEGACY) {
      26                 :          42 :         return OutputType::LEGACY;
      27         [ +  + ]:        1245 :     } else if (type == OUTPUT_TYPE_STRING_P2SH_SEGWIT) {
      28                 :          23 :         return OutputType::P2SH_SEGWIT;
      29         [ +  + ]:        1222 :     } else if (type == OUTPUT_TYPE_STRING_BECH32) {
      30                 :          12 :         return OutputType::BECH32;
      31         [ +  + ]:        1210 :     } else if (type == OUTPUT_TYPE_STRING_BECH32M) {
      32                 :          16 :         return OutputType::BECH32M;
      33                 :             :     }
      34                 :        1194 :     return std::nullopt;
      35                 :             : }
      36                 :             : 
      37                 :       29722 : const std::string& FormatOutputType(OutputType type)
      38                 :             : {
      39   [ +  +  +  -  :       29722 :     switch (type) {
                   -  + ]
      40                 :             :     case OutputType::LEGACY: return OUTPUT_TYPE_STRING_LEGACY;
      41                 :        7032 :     case OutputType::P2SH_SEGWIT: return OUTPUT_TYPE_STRING_P2SH_SEGWIT;
      42                 :        8600 :     case OutputType::BECH32: return OUTPUT_TYPE_STRING_BECH32;
      43                 :        7032 :     case OutputType::BECH32M: return OUTPUT_TYPE_STRING_BECH32M;
      44                 :           0 :     case OutputType::UNKNOWN: return OUTPUT_TYPE_STRING_UNKNOWN;
      45                 :             :     } // no default case, so the compiler can warn about missing cases
      46                 :           0 :     assert(false);
      47                 :             : }
      48                 :             : 
      49                 :        3144 : std::string FormatAllOutputTypes()
      50                 :             : {
      51         [ +  - ]:       28296 :     return util::Join(OUTPUT_TYPES, ", ", [](const auto& i) { return "\"" + FormatOutputType(i) + "\""; });
      52                 :             : }
      53                 :             : 
      54                 :          81 : CTxDestination AddAndGetDestinationForScript(FlatSigningProvider& keystore, const CScript& script, OutputType type)
      55                 :             : {
      56                 :             :     // Add script to keystore
      57                 :          81 :     keystore.scripts.emplace(CScriptID(script), script);
      58                 :             : 
      59      [ +  +  - ]:          81 :     switch (type) {
      60                 :          71 :     case OutputType::LEGACY:
      61                 :          71 :         return ScriptHash(script);
      62                 :          10 :     case OutputType::P2SH_SEGWIT:
      63                 :          10 :     case OutputType::BECH32: {
      64         [ +  - ]:          10 :         CTxDestination witdest = WitnessV0ScriptHash(script);
      65         [ +  - ]:          10 :         CScript witprog = GetScriptForDestination(witdest);
      66                 :             :         // Add the redeemscript, so that P2WSH and P2SH-P2WSH outputs are recognized as ours.
      67   [ +  -  +  - ]:          10 :         keystore.scripts.emplace(CScriptID(witprog), witprog);
      68         [ +  + ]:          10 :         if (type == OutputType::BECH32) {
      69                 :           2 :             return witdest;
      70                 :             :         } else {
      71         [ +  - ]:           8 :             return ScriptHash(witprog);
      72                 :             :         }
      73                 :          10 :     }
      74                 :           0 :     case OutputType::BECH32M:
      75                 :           0 :     case OutputType::UNKNOWN: {} // This function should not be used for BECH32M or UNKNOWN, so let it assert
      76                 :             :     } // no default case, so the compiler can warn about missing cases
      77                 :           0 :     assert(false);
      78                 :             : }
      79                 :             : 
      80                 :        5161 : std::optional<OutputType> OutputTypeFromDestination(const CTxDestination& dest) {
      81         [ +  - ]:        5161 :     if (std::holds_alternative<PKHash>(dest) ||
      82         [ +  + ]:        5161 :         std::holds_alternative<ScriptHash>(dest)) {
      83                 :         128 :         return OutputType::LEGACY;
      84                 :             :     }
      85         [ +  + ]:        5033 :     if (std::holds_alternative<WitnessV0KeyHash>(dest) ||
      86         [ +  + ]:        5030 :         std::holds_alternative<WitnessV0ScriptHash>(dest)) {
      87                 :          84 :         return OutputType::BECH32;
      88                 :             :     }
      89         [ +  + ]:        4949 :     if (std::holds_alternative<WitnessV1Taproot>(dest) ||
      90         [ +  + ]:        4888 :         std::holds_alternative<WitnessUnknown>(dest)) {
      91                 :         400 :         return OutputType::BECH32M;
      92                 :             :     }
      93                 :        4549 :     return std::nullopt;
      94                 :             : }