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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2021 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <outputtype.h>
#include <pubkey.h>
#include <script/script.h>
#include <script/sign.h>
#include <script/signingprovider.h>
#include <script/standard.h>
#include <util/vector.h>
#include <assert.h>
#include <optional>
#include <string>
static const std::string OUTPUT_TYPE_STRING_LEGACY = "legacy";
static const std::string OUTPUT_TYPE_STRING_P2SH_SEGWIT = "p2sh-segwit";
static const std::string OUTPUT_TYPE_STRING_BECH32 = "bech32";
static const std::string OUTPUT_TYPE_STRING_BECH32M = "bech32m";
std::optional<OutputType> ParseOutputType(const std::string& type)
{
if (type == OUTPUT_TYPE_STRING_LEGACY) {
return OutputType::LEGACY;
} else if (type == OUTPUT_TYPE_STRING_P2SH_SEGWIT) {
return OutputType::P2SH_SEGWIT;
} else if (type == OUTPUT_TYPE_STRING_BECH32) {
return OutputType::BECH32;
} else if (type == OUTPUT_TYPE_STRING_BECH32M) {
return OutputType::BECH32M;
}
return std::nullopt;
}
const std::string& FormatOutputType(OutputType type)
{
switch (type) {
case OutputType::LEGACY: return OUTPUT_TYPE_STRING_LEGACY;
case OutputType::P2SH_SEGWIT: return OUTPUT_TYPE_STRING_P2SH_SEGWIT;
case OutputType::BECH32: return OUTPUT_TYPE_STRING_BECH32;
case OutputType::BECH32M: return OUTPUT_TYPE_STRING_BECH32M;
} // no default case, so the compiler can warn about missing cases
assert(false);
}
CTxDestination GetDestinationForKey(const CPubKey& key, OutputType type)
{
switch (type) {
case OutputType::LEGACY: return PKHash(key);
case OutputType::P2SH_SEGWIT:
case OutputType::BECH32: {
if (!key.IsCompressed()) return PKHash(key);
CTxDestination witdest = WitnessV0KeyHash(key);
CScript witprog = GetScriptForDestination(witdest);
if (type == OutputType::P2SH_SEGWIT) {
return ScriptHash(witprog);
} else {
return witdest;
}
}
case OutputType::BECH32M: {} // This function should never be used with BECH32M, so let it assert
} // no default case, so the compiler can warn about missing cases
assert(false);
}
std::vector<CTxDestination> GetAllDestinationsForKey(const CPubKey& key)
{
PKHash keyid(key);
CTxDestination p2pkh{keyid};
if (key.IsCompressed()) {
CTxDestination segwit = WitnessV0KeyHash(keyid);
CTxDestination p2sh = ScriptHash(GetScriptForDestination(segwit));
return Vector(std::move(p2pkh), std::move(p2sh), std::move(segwit));
} else {
return Vector(std::move(p2pkh));
}
}
CTxDestination AddAndGetDestinationForScript(FillableSigningProvider& keystore, const CScript& script, OutputType type)
{
// Add script to keystore
keystore.AddCScript(script);
// Note that scripts over 520 bytes are not yet supported.
switch (type) {
case OutputType::LEGACY:
return ScriptHash(script);
case OutputType::P2SH_SEGWIT:
case OutputType::BECH32: {
CTxDestination witdest = WitnessV0ScriptHash(script);
CScript witprog = GetScriptForDestination(witdest);
// Check if the resulting program is solvable (i.e. doesn't use an uncompressed key)
if (!IsSolvable(keystore, witprog)) return ScriptHash(script);
// Add the redeemscript, so that P2WSH and P2SH-P2WSH outputs are recognized as ours.
keystore.AddCScript(witprog);
if (type == OutputType::BECH32) {
return witdest;
} else {
return ScriptHash(witprog);
}
}
case OutputType::BECH32M: {} // This function should not be used for BECH32M, so let it assert
} // no default case, so the compiler can warn about missing cases
assert(false);
}
std::optional<OutputType> OutputTypeFromDestination(const CTxDestination& dest) {
if (std::holds_alternative<PKHash>(dest) ||
std::holds_alternative<ScriptHash>(dest)) {
return OutputType::LEGACY;
}
if (std::holds_alternative<WitnessV0KeyHash>(dest) ||
std::holds_alternative<WitnessV0ScriptHash>(dest)) {
return OutputType::BECH32;
}
if (std::holds_alternative<WitnessV1Taproot>(dest) ||
std::holds_alternative<WitnessUnknown>(dest)) {
return OutputType::BECH32M;
}
return std::nullopt;
}
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