Schema generation

CHANGELOG.md

@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+- Schema generation - [#1765](https://github.com/paritytech/ink/pull/1765)
+
 ## Version 4.2.0
 
 ### Added

crates/e2e/Cargo.toml

@@ -40,7 +40,7 @@ sp-weights = "19.0.0"
 
 [dev-dependencies]
 # Required for the doctest of `MessageBuilder::call`
-scale-info = { version = "2.5", default-features = false, features = ["derive"] }
+scale-info = { version = "2.6", default-features = false, features = ["derive"] }
 
 [features]
 default = ["std"]

crates/env/Cargo.toml

@@ -49,7 +49,7 @@ secp256k1 = { version = "0.27.0", features = ["recovery", "global-context"], opt
 # Never use this crate outside the off-chain environment!
 scale-decode = { version = "0.5.0", default-features = false, optional = true }
 scale-encode = { version = "0.1.0", default-features = false, optional = true }
-scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
+scale-info = { version = "2.6", default-features = false, features = ["derive"], optional = true }
 
 [dev-dependencies]
 ink = { path = "../ink" }

crates/ink/Cargo.toml

@@ -32,7 +32,7 @@ ink_metadata = { path = "../metadata", default-features = false }
 
 trybuild = { version = "1.0.60", features = ["diff"] }
 # Required for the doctest of `env_access::EnvAccess::instantiate_contract`
-scale-info = { version = "2.5", default-features = false, features = ["derive"] }
+scale-info = { version = "2.6", default-features = false, features = ["derive"] }
 
 [features]
 default = ["std"]

crates/ink/macro/Cargo.toml

@@ -31,7 +31,7 @@ ink = { path = ".." }
 ink_metadata = { path = "../../metadata" }
 ink_prelude = { path = "../../prelude" }
 ink_storage = { path = "../../storage" }
-scale-info = { version = "2.5", default-features = false, features = ["derive"] }
+scale-info = { version = "2.6", default-features = false, features = ["derive"] }
 
 [lib]
 name = "ink_macro"

crates/metadata/Cargo.toml

@@ -21,7 +21,8 @@ ink_primitives = { version = "4.2.0", path = "../primitives/", default-features
 serde = { version = "1.0", default-features = false, features = ["derive", "alloc"] }
 impl-serde = "0.4.0"
 derive_more = { version = "0.99", default-features = false, features = ["from"] }
-scale-info = { version = "2.5", default-features = false, features = ["derive", "serde", "decode"] }
+scale-info = { version = "2.6", default-features = false, features = ["derive", "serde", "decode", "schema"] }
+schemars = "0.8"
 
 [dev-dependencies]
 pretty_assertions = "1"

crates/metadata/src/layout/mod.rs

@@ -40,14 +40,17 @@ use scale_info::{
     Registry,
     TypeInfo,
 };
+use schemars::JsonSchema;
 use serde::{
     de::DeserializeOwned,
     Deserialize,
     Serialize,
 };
 
 /// Represents the static storage layout of an ink! smart contract.
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, From, Serialize, Deserialize)]
+#[derive(
+    Debug, PartialEq, Eq, PartialOrd, Ord, From, Serialize, Deserialize, JsonSchema,
+)]
 #[serde(bound(
     serialize = "F::Type: Serialize, F::String: Serialize",
     deserialize = "F::Type: DeserializeOwned, F::String: DeserializeOwned"
@@ -74,7 +77,7 @@ pub enum Layout<F: Form = MetaForm> {
 }
 
 /// A pointer into some storage region.
-#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, From)]
+#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, From, JsonSchema)]
 pub struct LayoutKey {
     key: Key,
 }
@@ -121,13 +124,16 @@ impl LayoutKey {
 }
 
 /// Sub-tree root.
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, From, Serialize, Deserialize)]
+#[derive(
+    Debug, PartialEq, Eq, PartialOrd, Ord, From, Serialize, Deserialize, JsonSchema,
+)]
 #[serde(bound(
     serialize = "F::Type: Serialize, F::String: Serialize",
     deserialize = "F::Type: DeserializeOwned, F::String: DeserializeOwned"
 ))]
 pub struct RootLayout<F: Form = MetaForm> {
     /// The root key of the sub-tree.
+    #[schemars(with = "String")]
     root_key: LayoutKey,
     /// The storage layout of the unbounded layout elements.
     layout: Box<Layout<F>>,
@@ -171,13 +177,16 @@ where
 }
 
 /// A SCALE encoded cell.
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, From, Serialize, Deserialize)]
+#[derive(
+    Debug, PartialEq, Eq, PartialOrd, Ord, From, Serialize, Deserialize, JsonSchema,
+)]
 #[serde(bound(
     serialize = "F::Type: Serialize, F::String: Serialize",
     deserialize = "F::Type: DeserializeOwned, F::String: DeserializeOwned"
 ))]
 pub struct LeafLayout<F: Form = MetaForm> {
     /// The offset key into the storage.
+    #[schemars(with = "String")]
     key: LayoutKey,
     /// The type of the encoded entity.
     ty: <F as Form>::Type,
@@ -256,13 +265,14 @@ where
 /// A hashing layout potentially hitting all cells of the storage.
 ///
 /// Every hashing layout has an offset and a strategy to compute its keys.
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize, JsonSchema)]
 #[serde(bound(
     serialize = "F::Type: Serialize, F::String: Serialize",
     deserialize = "F::Type: DeserializeOwned, F::String: DeserializeOwned"
 ))]
 pub struct HashLayout<F: Form = MetaForm> {
     /// The key offset used by the strategy.
+    #[schemars(with = "String")]
     offset: LayoutKey,
     /// The hashing strategy to layout the underlying elements.
     strategy: HashingStrategy,
@@ -322,7 +332,7 @@ where
 /// The offset key is used as another postfix for the computation.
 /// So the actual formula is: `hasher(prefix + encoded(key) + offset + postfix)`
 /// Where `+` in this contexts means append of the byte slices.
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize, JsonSchema)]
 pub struct HashingStrategy {
     /// One of the supported crypto hashers.
     hasher: CryptoHasher,
@@ -367,7 +377,7 @@ impl HashingStrategy {
 }
 
 /// One of the supported crypto hashers.
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize, JsonSchema)]
 pub enum CryptoHasher {
     /// The BLAKE-2 crypto hasher with an output of 256 bits.
     Blake2x256,
@@ -378,7 +388,7 @@ pub enum CryptoHasher {
 }
 
 /// A layout for an array of associated cells with the same encoding.
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize, JsonSchema)]
 #[serde(bound(
     serialize = "F::Type: Serialize, F::String: Serialize",
     deserialize = "F::Type: DeserializeOwned, F::String: DeserializeOwned"
@@ -388,6 +398,7 @@ pub struct ArrayLayout<F: Form = MetaForm> {
     /// The offset key of the array layout.
     ///
     /// This is the same key as the element at index 0 of the array layout.
+    #[schemars(with = "String")]
     offset: LayoutKey,
     /// The number of elements in the array layout.
     len: u32,
@@ -446,7 +457,7 @@ impl IntoPortable for ArrayLayout {
 }
 
 /// A struct layout with consecutive fields of different layout.
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize, JsonSchema)]
 #[serde(bound(
     serialize = "F::Type: Serialize, F::String: Serialize",
     deserialize = "F::Type: DeserializeOwned, F::String: DeserializeOwned"
@@ -500,7 +511,7 @@ impl IntoPortable for StructLayout {
 }
 
 /// The layout for a particular field of a struct layout.
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize, JsonSchema)]
 #[serde(bound(
     serialize = "F::Type: Serialize, F::String: Serialize",
     deserialize = "F::Type: DeserializeOwned, F::String: DeserializeOwned"
@@ -557,7 +568,9 @@ impl IntoPortable for FieldLayout {
 }
 
 /// The discriminant of an enum variant.
-#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)]
+#[derive(
+    Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize, JsonSchema,
+)]
 pub struct Discriminant(usize);
 
 impl From<usize> for Discriminant {
@@ -574,7 +587,7 @@ impl Discriminant {
 }
 
 /// An enum storage layout.
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize, JsonSchema)]
 #[serde(bound(
     serialize = "F::Type: Serialize, F::String: Serialize",
     deserialize = "F::Type: DeserializeOwned, F::String: DeserializeOwned"
@@ -584,6 +597,7 @@ pub struct EnumLayout<F: Form = MetaForm> {
     /// The name of the Enum.
     name: F::String,
     /// The key where the discriminant is stored to dispatch the variants.
+    #[schemars(with = "String")]
     dispatch_key: LayoutKey,
     /// The variants of the enum.
     variants: BTreeMap<Discriminant, StructLayout<F>>,

crates/metadata/src/lib.rs

@@ -61,6 +61,7 @@ use scale_info::{
     PortableRegistry,
     Registry,
 };
+use schemars::JsonSchema;
 use serde::{
     Deserialize,
     Serialize,
@@ -76,7 +77,7 @@ use serde::{
 /// Versions other than the `Default` are considered deprecated. If you want to
 /// deserialize legacy metadata versions you will need to use an old version of
 /// this crate.
-#[derive(Debug, Serialize, Deserialize, Eq, PartialEq)]
+#[derive(Debug, Serialize, Deserialize, Eq, PartialEq, JsonSchema)]
 pub enum MetadataVersion {
     #[serde(rename = "4")]
     V4,
@@ -89,7 +90,7 @@ impl Default for MetadataVersion {
 }
 
 /// An entire ink! project for metadata file generation purposes.
-#[derive(Debug, Serialize, Deserialize)]
+#[derive(Debug, Serialize, Deserialize, JsonSchema)]
 pub struct InkProject {
     version: MetadataVersion,
     #[serde(flatten)]

crates/metadata/src/specs.rs

@@ -36,14 +36,15 @@ use scale_info::{
     Registry,
     TypeInfo,
 };
+use schemars::JsonSchema;
 use serde::{
     de::DeserializeOwned,
     Deserialize,
     Serialize,
 };
 
 /// Describes a contract.
-#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, JsonSchema)]
 #[serde(bound(
     serialize = "F::Type: Serialize, F::String: Serialize",
     deserialize = "F::Type: DeserializeOwned, F::String: DeserializeOwned"
@@ -289,7 +290,7 @@ where
 }
 
 /// Describes a constructor of a contract.
-#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, JsonSchema)]
 #[serde(bound(
     serialize = "F::Type: Serialize, F::String: Serialize",
     deserialize = "F::Type: DeserializeOwned, F::String: DeserializeOwned",
@@ -529,7 +530,7 @@ where
 }
 
 /// Describes a contract message.
-#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, JsonSchema)]
 #[serde(bound(
     serialize = "F::Type: Serialize, F::String: Serialize",
     deserialize = "F::Type: DeserializeOwned, F::String: DeserializeOwned"
@@ -837,7 +838,7 @@ impl IntoPortable for MessageSpec {
 }
 
 /// Describes an event definition.
-#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, JsonSchema)]
 #[serde(bound(
     serialize = "F::Type: Serialize, F::String: Serialize",
     deserialize = "F::Type: DeserializeOwned, F::String: DeserializeOwned"
@@ -949,8 +950,8 @@ where
 }
 
 /// The 4 byte selector to identify constructors and messages
-#[derive(Debug, Default, PartialEq, Eq, derive_more::From)]
-pub struct Selector([u8; 4]);
+#[derive(Debug, Default, PartialEq, Eq, derive_more::From, JsonSchema)]
+pub struct Selector(#[schemars(with = "String")] [u8; 4]);
 
 impl serde::Serialize for Selector {
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
@@ -1023,7 +1024,7 @@ pub type DisplayName<F> = scale_info::Path<F>;
 /// `pred`s display name is `Predicate` and the display name of
 /// the return type is simply `bool`. Note that `Predicate` could
 /// simply be a type alias to `fn(i32, i32) -> Ordering`.
-#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, JsonSchema)]
 #[serde(bound(
     serialize = "F::Type: Serialize, F::String: Serialize",
     deserialize = "F::Type: DeserializeOwned, F::String: DeserializeOwned"
@@ -1145,7 +1146,7 @@ where
 }
 
 /// Describes a pair of parameter label and type.
-#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, JsonSchema)]
 #[serde(bound(
     serialize = "F::Type: Serialize, F::String: Serialize",
     deserialize = "F::Type: DeserializeOwned, F::String: DeserializeOwned"
@@ -1264,7 +1265,7 @@ where
 }
 
 /// Describes the contract message return type.
-#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, JsonSchema)]
 #[serde(transparent)]
 #[serde(bound(
     serialize = "F::Type: Serialize, F::String: Serialize",
@@ -1316,7 +1317,7 @@ where
 }
 
 /// Describes a pair of parameter label and type.
-#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, JsonSchema)]
 #[serde(bound(
     serialize = "F::Type: Serialize, F::String: Serialize",
     deserialize = "F::Type: DeserializeOwned, F::String: DeserializeOwned"
@@ -1392,7 +1393,7 @@ where
 }
 
 /// Describes a contract environment.
-#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, JsonSchema)]
 #[serde(bound(
     serialize = "F::Type: Serialize, F::String: Serialize",
     deserialize = "F::Type: DeserializeOwned, F::String: DeserializeOwned"

crates/primitives/Cargo.toml

@@ -20,7 +20,7 @@ ink_prelude = { version = "4.2.0", path = "../prelude/", default-features = fals
 scale = { package = "parity-scale-codec", version = "3.4", default-features = false, features = ["derive"] }
 scale-decode = { version = "0.5.0", default-features = false, features = ["derive"], optional = true }
 scale-encode = { version = "0.1.0", default-features = false, features = ["derive"], optional = true }
-scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
+scale-info = { version = "2.6", default-features = false, features = ["derive"], optional = true }
 xxhash-rust = { version = "0.8", features = ["const_xxh32"] }
 
 [features]

crates/storage/Cargo.toml

@@ -23,7 +23,7 @@ ink_prelude = { version = "4.2.0", path = "../prelude/", default-features = fals
 
 scale = { package = "parity-scale-codec", version = "3.4", default-features = false, features = ["derive"] }
 derive_more = { version = "0.99", default-features = false, features = ["from", "display"] }
-scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
+scale-info = { version = "2.6", default-features = false, features = ["derive"], optional = true }
 cfg-if = "1.0"
 array-init = { version = "2.0", default-features = false }
 

crates/storage/traits/Cargo.toml

@@ -19,7 +19,7 @@ ink_metadata = { version = "4.2.0", path = "../../metadata", default-features =
 ink_primitives = { version = "4.2.0", path = "../../primitives", default-features = false }
 ink_prelude = { version = "4.2.0", path = "../../prelude", default-features = false }
 scale = { package = "parity-scale-codec", version = "3.4", default-features = false, features = ["derive"] }
-scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
+scale-info = { version = "2.6", default-features = false, features = ["derive"], optional = true }
 
 [dev-dependencies]
 paste = "1.0"

integration-tests/basic-contract-caller/Cargo.toml

@@ -9,7 +9,7 @@ publish = false
 ink = { path = "../../crates/ink", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
-scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
+scale-info = { version = "2.6", default-features = false, features = ["derive"], optional = true }
 
 # Note: We **need** to specify the `ink-as-dependency` feature.
 #

integration-tests/basic-contract-caller/other-contract/Cargo.toml

@@ -9,7 +9,7 @@ publish = false
 ink = { path = "../../../crates/ink", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
-scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
+scale-info = { version = "2.6", default-features = false, features = ["derive"], optional = true }
 
 [dev-dependencies]
 ink_e2e = { path = "../../../crates/e2e" }

integration-tests/call-runtime/Cargo.toml

@@ -9,7 +9,7 @@ publish = false
 ink = { path = "../../crates/ink", default-features = false, features = ["call-runtime"] }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
-scale-info = { version = "2.5", default-features = false, features = ["derive"], optional = true }
+scale-info = { version = "2.6", default-features = false, features = ["derive"], optional = true }
 
 # Substrate
 #