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Add frame-metadata from substrate.

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This commit is contained in:
Tomasz Drwięga
2020-12-10 13:02:22 +01:00
parent 81929036fd
commit 6826ca8a00
7 changed files with 713 additions and 8 deletions
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Cargo.toml
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[workspace]
members = [
"frame-metadata"
]
LICENSE-APACHE2
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@@ -0,0 +1,211 @@
Apache License
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LICENSE → LICENSE-GPL3
+33 -7
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@@ -1,7 +1,7 @@
GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
@@ -631,8 +631,8 @@ to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
{one line to give the program's name and a brief idea of what it does.}
Copyright (C) {year} {name of author}
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -645,14 +645,14 @@ the "copyright" line and a pointer to where the full notice is found.
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
along with this program. If not, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
{project} Copyright (C) {year} {fullname}
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
@@ -664,11 +664,37 @@ might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.
<http://www.gnu.org/philosophy/why-not-lgpl.html>.
"CLASSPATH" EXCEPTION TO THE GPL
Linking this library statically or dynamically with other modules is making
a combined work based on this library. Thus, the terms and conditions of the
GNU General Public License cover the whole combination.
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent modules,
and to copy and distribute the resulting executable under terms of your
choice, provided that you also meet, for each linked independent module,
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If you modify this library, you may extend this exception to your version
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do so, delete this exception statement from your version.
NOTE
Individual files contain the following tag instead of the full license text.
SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
This enables machine processing of license information based on the SPDX
License Identifiers that are here available: http://spdx.org/licenses/
README.md
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# frame-metadata-rs
# frame-metadata
A set of tools to parse FRAME metadata retrieved from Substrate-based nodes.
frame-metadata/Cargo.toml
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[package]
name = "frame-metadata"
version = "12.0.0"
authors = ["Parity Technologies <admin@parity.io>"]
edition = "2018"
license = "Apache-2.0"
homepage = "https://substrate.dev"
repository = "https://github.com/paritytech/substrate/"
description = "Decodable variant of the RuntimeMetadata."
readme = "README.md"
[package.metadata.docs.rs]
targets = ["x86_64-unknown-linux-gnu"]
[dependencies]
codec = { package = "parity-scale-codec", version = "1.3.4", default-features = false, features = ["derive"] }
serde = { version = "1.0.101", optional = true, features = ["derive"] }
[features]
default = ["std", "v12"]
v12 = []
std = [
"codec/std",
"serde",
]
frame-metadata/README.md
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Decodable variant of the RuntimeMetadata.
This really doesn't belong here, but is necessary for the moment. In the future
it should be removed entirely to an external module for shimming on to the
codec-encoded metadata.
License: Apache-2.0
frame-metadata/src/lib.rs
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// This file is part of Substrate.
// Copyright (C) 2018-2020 Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//! Decodable variant of the RuntimeMetadata.
#![cfg_attr(not(feature = "std"), no_std)]
#[cfg(feature = "std")]
use serde::Serialize;
#[cfg(feature = "std")]
use codec::{Decode, Input, Error};
use codec::{Encode, Output};
#[cfg(not(feature = "std"))]
extern crate alloc;
#[cfg(not(feature = "std"))]
use alloc::vec::Vec;
#[cfg(feature = "std")]
type StringBuf = String;
/// Current prefix of metadata
pub const META_RESERVED: u32 = 0x6174656d; // 'meta' warn endianness
/// On `no_std` we do not support `Decode` and thus `StringBuf` is just `&'static str`.
/// So, if someone tries to decode this stuff on `no_std`, they will get a compilation error.
#[cfg(not(feature = "std"))]
type StringBuf = &'static str;
/// A type that decodes to a different type than it encodes.
/// The user needs to make sure that both types use the same encoding.
///
/// For example a `&'static [ &'static str ]` can be decoded to a `Vec<String>`.
#[derive(Clone)]
pub enum DecodeDifferent<B, O> where B: 'static, O: 'static {
Encode(B),
Decoded(O),
}
impl<B, O> Encode for DecodeDifferent<B, O> where B: Encode + 'static, O: Encode + 'static {
fn encode_to<W: Output>(&self, dest: &mut W) {
match self {
DecodeDifferent::Encode(b) => b.encode_to(dest),
DecodeDifferent::Decoded(o) => o.encode_to(dest),
}
}
}
impl<B, O> codec::EncodeLike for DecodeDifferent<B, O> where B: Encode + 'static, O: Encode + 'static {}
#[cfg(feature = "std")]
impl<B, O> Decode for DecodeDifferent<B, O> where B: 'static, O: Decode + 'static {
fn decode<I: Input>(input: &mut I) -> Result<Self, Error> {
<O>::decode(input).map(|val| {
DecodeDifferent::Decoded(val)
})
}
}
impl<B, O> PartialEq for DecodeDifferent<B, O>
where
B: Encode + Eq + PartialEq + 'static,
O: Encode + Eq + PartialEq + 'static,
{
fn eq(&self, other: &Self) -> bool {
self.encode() == other.encode()
}
}
impl<B, O> Eq for DecodeDifferent<B, O>
where B: Encode + Eq + PartialEq + 'static, O: Encode + Eq + PartialEq + 'static
{}
impl<B, O> core::fmt::Debug for DecodeDifferent<B, O>
where
B: core::fmt::Debug + Eq + 'static,
O: core::fmt::Debug + Eq + 'static,
{
fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
match self {
DecodeDifferent::Encode(b) => b.fmt(f),
DecodeDifferent::Decoded(o) => o.fmt(f),
}
}
}
#[cfg(feature = "std")]
impl<B, O> serde::Serialize for DecodeDifferent<B, O>
where
B: serde::Serialize + 'static,
O: serde::Serialize + 'static,
{
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: serde::Serializer {
match self {
DecodeDifferent::Encode(b) => b.serialize(serializer),
DecodeDifferent::Decoded(o) => o.serialize(serializer),
}
}
}
pub type DecodeDifferentArray<B, O=B> = DecodeDifferent<&'static [B], Vec<O>>;
type DecodeDifferentStr = DecodeDifferent<&'static str, StringBuf>;
/// All the metadata about a function.
#[derive(Clone, PartialEq, Eq, Encode)]
#[cfg_attr(feature = "std", derive(Decode, Serialize, Debug))]
pub struct FunctionMetadata {
pub name: DecodeDifferentStr,
pub arguments: DecodeDifferentArray<FunctionArgumentMetadata>,
pub documentation: DecodeDifferentArray<&'static str, StringBuf>,
}
/// All the metadata about a function argument.
#[derive(Clone, PartialEq, Eq, Encode)]
#[cfg_attr(feature = "std", derive(Decode, Serialize, Debug))]
pub struct FunctionArgumentMetadata {
pub name: DecodeDifferentStr,
pub ty: DecodeDifferentStr,
}
/// Newtype wrapper for support encoding functions (actual the result of the function).
#[derive(Clone, Eq)]
pub struct FnEncode<E>(pub fn() -> E) where E: Encode + 'static;
impl<E: Encode> Encode for FnEncode<E> {
fn encode_to<W: Output>(&self, dest: &mut W) {
self.0().encode_to(dest);
}
}
impl<E: Encode> codec::EncodeLike for FnEncode<E> {}
impl<E: Encode + PartialEq> PartialEq for FnEncode<E> {
fn eq(&self, other: &Self) -> bool {
self.0().eq(&other.0())
}
}
impl<E: Encode + core::fmt::Debug> core::fmt::Debug for FnEncode<E> {
fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
self.0().fmt(f)
}
}
#[cfg(feature = "std")]
impl<E: Encode + serde::Serialize> serde::Serialize for FnEncode<E> {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: serde::Serializer {
self.0().serialize(serializer)
}
}
/// All the metadata about an outer event.
#[derive(Clone, PartialEq, Eq, Encode)]
#[cfg_attr(feature = "std", derive(Decode, Serialize, Debug))]
pub struct OuterEventMetadata {
pub name: DecodeDifferentStr,
pub events: DecodeDifferentArray<
(&'static str, FnEncode<&'static [EventMetadata]>),
(StringBuf, Vec<EventMetadata>)
>,
}
/// All the metadata about an event.
#[derive(Clone, PartialEq, Eq, Encode)]
#[cfg_attr(feature = "std", derive(Decode, Serialize, Debug))]
pub struct EventMetadata {
pub name: DecodeDifferentStr,
pub arguments: DecodeDifferentArray<&'static str, StringBuf>,
pub documentation: DecodeDifferentArray<&'static str, StringBuf>,
}
/// All the metadata about one storage entry.
#[derive(Clone, PartialEq, Eq, Encode)]
#[cfg_attr(feature = "std", derive(Decode, Serialize, Debug))]
pub struct StorageEntryMetadata {
pub name: DecodeDifferentStr,
pub modifier: StorageEntryModifier,
pub ty: StorageEntryType,
pub default: ByteGetter,
pub documentation: DecodeDifferentArray<&'static str, StringBuf>,
}
/// All the metadata about one module constant.
#[derive(Clone, PartialEq, Eq, Encode)]
#[cfg_attr(feature = "std", derive(Decode, Serialize, Debug))]
pub struct ModuleConstantMetadata {
pub name: DecodeDifferentStr,
pub ty: DecodeDifferentStr,
pub value: ByteGetter,
pub documentation: DecodeDifferentArray<&'static str, StringBuf>,
}
/// All the metadata about a module error.
#[derive(Clone, PartialEq, Eq, Encode)]
#[cfg_attr(feature = "std", derive(Decode, Serialize, Debug))]
pub struct ErrorMetadata {
pub name: DecodeDifferentStr,
pub documentation: DecodeDifferentArray<&'static str, StringBuf>,
}
/// All the metadata about errors in a module.
pub trait ModuleErrorMetadata {
fn metadata() -> &'static [ErrorMetadata];
}
impl ModuleErrorMetadata for &'static str {
fn metadata() -> &'static [ErrorMetadata] {
&[]
}
}
/// A technical trait to store lazy initiated vec value as static dyn pointer.
pub trait DefaultByte: Send + Sync {
fn default_byte(&self) -> Vec<u8>;
}
/// Wrapper over dyn pointer for accessing a cached once byte value.
#[derive(Clone)]
pub struct DefaultByteGetter(pub &'static dyn DefaultByte);
/// Decode different for static lazy initiated byte value.
pub type ByteGetter = DecodeDifferent<DefaultByteGetter, Vec<u8>>;
impl Encode for DefaultByteGetter {
fn encode_to<W: Output>(&self, dest: &mut W) {
self.0.default_byte().encode_to(dest)
}
}
impl codec::EncodeLike for DefaultByteGetter {}
impl PartialEq<DefaultByteGetter> for DefaultByteGetter {
fn eq(&self, other: &DefaultByteGetter) -> bool {
let left = self.0.default_byte();
let right = other.0.default_byte();
left.eq(&right)
}
}
impl Eq for DefaultByteGetter { }
#[cfg(feature = "std")]
impl serde::Serialize for DefaultByteGetter {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: serde::Serializer {
self.0.default_byte().serialize(serializer)
}
}
impl core::fmt::Debug for DefaultByteGetter {
fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
self.0.default_byte().fmt(f)
}
}
/// Hasher used by storage maps
#[derive(Clone, PartialEq, Eq, Encode)]
#[cfg_attr(feature = "std", derive(Decode, Serialize, Debug))]
pub enum StorageHasher {
Blake2_128,
Blake2_256,
Blake2_128Concat,
Twox128,
Twox256,
Twox64Concat,
Identity,
}
/// A storage entry type.
#[derive(Clone, PartialEq, Eq, Encode)]
#[cfg_attr(feature = "std", derive(Decode, Serialize, Debug))]
pub enum StorageEntryType {
Plain(DecodeDifferentStr),
Map {
hasher: StorageHasher,
key: DecodeDifferentStr,
value: DecodeDifferentStr,
// is_linked flag previously, unused now to keep backwards compat
unused: bool,
},
DoubleMap {
hasher: StorageHasher,
key1: DecodeDifferentStr,
key2: DecodeDifferentStr,
value: DecodeDifferentStr,
key2_hasher: StorageHasher,
},
}
/// A storage entry modifier.
#[derive(Clone, PartialEq, Eq, Encode)]
#[cfg_attr(feature = "std", derive(Decode, Serialize, Debug))]
pub enum StorageEntryModifier {
Optional,
Default,
}
/// All metadata of the storage.
#[derive(Clone, PartialEq, Eq, Encode)]
#[cfg_attr(feature = "std", derive(Decode, Serialize, Debug))]
pub struct StorageMetadata {
/// The common prefix used by all storage entries.
pub prefix: DecodeDifferent<&'static str, StringBuf>,
pub entries: DecodeDifferent<&'static [StorageEntryMetadata], Vec<StorageEntryMetadata>>,
}
/// Metadata prefixed by a u32 for reserved usage
#[derive(Eq, Encode, PartialEq)]
#[cfg_attr(feature = "std", derive(Decode, Serialize, Debug))]
pub struct RuntimeMetadataPrefixed(pub u32, pub RuntimeMetadata);
/// Metadata of the extrinsic used by the runtime.
#[derive(Eq, Encode, PartialEq)]
#[cfg_attr(feature = "std", derive(Decode, Serialize, Debug))]
pub struct ExtrinsicMetadata {
/// Extrinsic version.
pub version: u8,
/// The signed extensions in the order they appear in the extrinsic.
pub signed_extensions: Vec<DecodeDifferentStr>,
}
/// The metadata of a runtime.
/// The version ID encoded/decoded through
/// the enum nature of `RuntimeMetadata`.
#[derive(Eq, Encode, PartialEq)]
#[cfg_attr(feature = "std", derive(Decode, Serialize, Debug))]
pub enum RuntimeMetadata {
/// Unused; enum filler.
V0(RuntimeMetadataDeprecated),
/// Version 1 for runtime metadata. No longer used.
V1(RuntimeMetadataDeprecated),
/// Version 2 for runtime metadata. No longer used.
V2(RuntimeMetadataDeprecated),
/// Version 3 for runtime metadata. No longer used.
V3(RuntimeMetadataDeprecated),
/// Version 4 for runtime metadata. No longer used.
V4(RuntimeMetadataDeprecated),
/// Version 5 for runtime metadata. No longer used.
V5(RuntimeMetadataDeprecated),
/// Version 6 for runtime metadata. No longer used.
V6(RuntimeMetadataDeprecated),
/// Version 7 for runtime metadata. No longer used.
V7(RuntimeMetadataDeprecated),
/// Version 8 for runtime metadata. No longer used.
V8(RuntimeMetadataDeprecated),
/// Version 9 for runtime metadata. No longer used.
V9(RuntimeMetadataDeprecated),
/// Version 10 for runtime metadata. No longer used.
V10(RuntimeMetadataDeprecated),
/// Version 11 for runtime metadata. No longer used.
V11(RuntimeMetadataDeprecated),
/// Version 12 for runtime metadata.
#[cfg(feature = "v12")]
V12(RuntimeMetadataV12),
#[cfg(not(feature = "v12"))]
V12(RuntimeMetadataDeprecated),
}
/// Enum that should fail.
#[derive(Eq, PartialEq)]
#[cfg_attr(feature = "std", derive(Serialize, Debug))]
pub enum RuntimeMetadataDeprecated { }
impl Encode for RuntimeMetadataDeprecated {
fn encode_to<W: Output>(&self, _dest: &mut W) {}
}
impl codec::EncodeLike for RuntimeMetadataDeprecated {}
#[cfg(feature = "std")]
impl Decode for RuntimeMetadataDeprecated {
fn decode<I: Input>(_input: &mut I) -> Result<Self, Error> {
Err("Decoding is not supported".into())
}
}
/// The metadata of a runtime.
#[derive(Eq, Encode, PartialEq)]
#[cfg_attr(feature = "std", derive(Decode, Serialize, Debug))]
pub struct RuntimeMetadataV12 {
/// Metadata of all the modules.
pub modules: DecodeDifferentArray<ModuleMetadata>,
/// Metadata of the extrinsic.
pub extrinsic: ExtrinsicMetadata,
}
/// The latest version of the metadata.
pub type RuntimeMetadataLastVersion = RuntimeMetadataV12;
/// All metadata about an runtime module.
#[derive(Clone, PartialEq, Eq, Encode)]
#[cfg_attr(feature = "std", derive(Decode, Serialize, Debug))]
pub struct ModuleMetadata {
pub name: DecodeDifferentStr,
pub storage: Option<DecodeDifferent<FnEncode<StorageMetadata>, StorageMetadata>>,
pub calls: ODFnA<FunctionMetadata>,
pub event: ODFnA<EventMetadata>,
pub constants: DFnA<ModuleConstantMetadata>,
pub errors: DFnA<ErrorMetadata>,
/// Define the index of the module, this index will be used for the encoding of module event,
/// call and origin variants.
pub index: u8,
}
type ODFnA<T> = Option<DFnA<T>>;
type DFnA<T> = DecodeDifferent<FnEncode<&'static [T]>, Vec<T>>;
impl Into<Vec<u8>> for RuntimeMetadataPrefixed {
fn into(self) -> Vec<u8> {
self.encode()
}
}
impl Into<RuntimeMetadataPrefixed> for RuntimeMetadataLastVersion {
fn into(self) -> RuntimeMetadataPrefixed {
RuntimeMetadataPrefixed(META_RESERVED, RuntimeMetadata::V12(self))
}
}