diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/script/descriptor.h | 78 |
1 files changed, 40 insertions, 38 deletions
diff --git a/src/script/descriptor.h b/src/script/descriptor.h index 0195ca0939..5a1b55259a 100644 --- a/src/script/descriptor.h +++ b/src/script/descriptor.h @@ -11,22 +11,24 @@ #include <vector> -// Descriptors are strings that describe a set of scriptPubKeys, together with -// all information necessary to solve them. By combining all information into -// one, they avoid the need to separately import keys and scripts. -// -// Descriptors may be ranged, which occurs when the public keys inside are -// specified in the form of HD chains (xpubs). -// -// Descriptors always represent public information - public keys and scripts - -// but in cases where private keys need to be conveyed along with a descriptor, -// they can be included inside by changing public keys to private keys (WIF -// format), and changing xpubs by xprvs. -// -// Reference documentation about the descriptor language can be found in -// doc/descriptors.md. - -/** Interface for parsed descriptor objects. */ + +/** \brief Interface for parsed descriptor objects. + * + * Descriptors are strings that describe a set of scriptPubKeys, together with + * all information necessary to solve them. By combining all information into + * one, they avoid the need to separately import keys and scripts. + * + * Descriptors may be ranged, which occurs when the public keys inside are + * specified in the form of HD chains (xpubs). + * + * Descriptors always represent public information - public keys and scripts - + * but in cases where private keys need to be conveyed along with a descriptor, + * they can be included inside by changing public keys to private keys (WIF + * format), and changing xpubs by xprvs. + * + * Reference documentation about the descriptor language can be found in + * doc/descriptors.md. + */ struct Descriptor { virtual ~Descriptor() = default; @@ -45,51 +47,51 @@ struct Descriptor { /** Expand a descriptor at a specified position. * - * pos: the position at which to expand the descriptor. If IsRange() is false, this is ignored. - * provider: the provider to query for private keys in case of hardened derivation. - * output_scripts: the expanded scriptPubKeys will be put here. - * out: scripts and public keys necessary for solving the expanded scriptPubKeys will be put here (may be equal to provider). - * cache: vector which will be overwritten with cache data necessary to evaluate the descriptor at this point without access to private keys. + * @param[in] pos: The position at which to expand the descriptor. If IsRange() is false, this is ignored. + * @param[in] provider: The provider to query for private keys in case of hardened derivation. + * @param[out] output_scripts: The expanded scriptPubKeys. + * @param[out] out: Scripts and public keys necessary for solving the expanded scriptPubKeys (may be equal to `provider`). + * @param[out] cache: Cache data necessary to evaluate the descriptor at this point without access to private keys. */ virtual bool Expand(int pos, const SigningProvider& provider, std::vector<CScript>& output_scripts, FlatSigningProvider& out, std::vector<unsigned char>* cache = nullptr) const = 0; /** Expand a descriptor at a specified position using cached expansion data. * - * pos: the position at which to expand the descriptor. If IsRange() is false, this is ignored. - * cache: vector from which cached expansion data will be read. - * output_scripts: the expanded scriptPubKeys will be put here. - * out: scripts and public keys necessary for solving the expanded scriptPubKeys will be put here (may be equal to provider). + * @param[in] pos: The position at which to expand the descriptor. If IsRange() is false, this is ignored. + * @param[in] cache: Cached expansion data. + * @param[out] output_scripts: The expanded scriptPubKeys. + * @param[out] out: Scripts and public keys necessary for solving the expanded scriptPubKeys (may be equal to `provider`). */ virtual bool ExpandFromCache(int pos, const std::vector<unsigned char>& cache, std::vector<CScript>& output_scripts, FlatSigningProvider& out) const = 0; /** Expand the private key for a descriptor at a specified position, if possible. * - * pos: the position at which to expand the descriptor. If IsRange() is false, this is ignored. - * provider: the provider to query for the private keys. - * out: any private keys available for the specified pos will be placed here. + * @param[in] pos: The position at which to expand the descriptor. If IsRange() is false, this is ignored. + * @param[in] provider: The provider to query for the private keys. + * @param[out] out: Any private keys available for the specified `pos`. */ virtual void ExpandPrivate(int pos, const SigningProvider& provider, FlatSigningProvider& out) const = 0; }; -/** Parse a descriptor string. Included private keys are put in out. +/** Parse a `descriptor` string. Included private keys are put in `out`. * - * If the descriptor has a checksum, it must be valid. If require_checksum + * If the descriptor has a checksum, it must be valid. If `require_checksum` * is set, the checksum is mandatory - otherwise it is optional. * * If a parse error occurs, or the checksum is missing/invalid, or anything - * else is wrong, nullptr is returned. + * else is wrong, `nullptr` is returned. */ std::unique_ptr<Descriptor> Parse(const std::string& descriptor, FlatSigningProvider& out, std::string& error, bool require_checksum = false); -/** Get the checksum for a descriptor. +/** Get the checksum for a `descriptor`. * - * If it already has one, and it is correct, return the checksum in the input. - * If it already has one that is wrong, return "". - * If it does not already have one, return the checksum that would need to be added. + * - If it already has one, and it is correct, return the checksum in the input. + * - If it already has one that is wrong, return "". + * - If it does not already have one, return the checksum that would need to be added. */ std::string GetDescriptorChecksum(const std::string& descriptor); -/** Find a descriptor for the specified script, using information from provider where possible. +/** Find a descriptor for the specified `script`, using information from `provider` where possible. * * A non-ranged descriptor which only generates the specified script will be returned in all * circumstances. @@ -98,9 +100,9 @@ std::string GetDescriptorChecksum(const std::string& descriptor); * descriptor. * * - If all information for solving `script` is present in `provider`, a descriptor will be returned - * which is `IsSolvable()` and encapsulates said information. + * which is IsSolvable() and encapsulates said information. * - Failing that, if `script` corresponds to a known address type, an "addr()" descriptor will be - * returned (which is not `IsSolvable()`). + * returned (which is not IsSolvable()). * - Failing that, a "raw()" descriptor is returned. */ std::unique_ptr<Descriptor> InferDescriptor(const CScript& script, const SigningProvider& provider); |