Use scale-typegen as a backend for the codegen (#1260)

* integrate scale-typegen, remove types mod

* reintroduce default substitutes and derives

* support runtime_types only again

* generating polkadot.rs ok

* update scale-typegen to discrete error types

* scale-typegen-api-changes

* add note about UncheckedExtrinsic in default substitutes

* add resursive attributes and derives

* adjust example where Clone bound recursive

* move scale-typegen dependency to workspace

* expose default typegen settings

* lightclient: Fix wasm socket closure called after being dropped (#1289)

* lightclient: Close wasm socket while dropping from connecting state

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* lightclient: Construct one time only closures

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* testing: Enable console logs for lightclient WASM testing

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* lightclient: Separate wakes and check connectivity on poll_read

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* lightclient: Close the socket depending on internal state

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* Revert "lightclient: Separate wakes and check connectivity on poll_read"

This reverts commit 866094001d4c0b119a80ed681a74b323f74eae1b.

* lightclient: Return pending if socket is opening from poll_read

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* lightclient: Close the socket on `poll_close`

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* lightclient: Reset closures on Drop to avoid recursive invokation

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* lightclient: Close the socket if not already closing

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

---------

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* workflows: Install rustup component for building substrate (#1295)

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* cli: Command to fetch chainSpec and optimise its size (#1278)

* cli: Add chainSpec command

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* cli/chainSpec: Move to dedicated module

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* cli: Compute the state root hash

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* cli: Remove code substitutes

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* artifacts: Update polkadot.json

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* scripts: Generate the chain spec

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* cli: Remove testing artifacts

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* cli: Fix clippy

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* cli: Apply rustfmt

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* cli: Introduce feature flag for smoldot dependency

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* cli: Rename chain-spec to chain-spec-pruning

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* scripts: Update chain-spec command

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

---------

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

* remove comments and unused args

* Update substrate- and signer-related dependencies (#1297)

* update crypto dependencies, adjust keypair

* add scale_info::TypeInfo derive in some places

* add multi signature derive

* fix lock file

* fix lock file again :|

* adjust to new interface in scale-typegen

* use released scale typegen

* reintroduce type aliases

* introduce type aliases again using scale-typegen

* cargo fmt and clippy

* reconcile changes with master branch

* update polkadot.rs

* bump scale-typgen to fix substitution

* implemented Alex suggestions, regenerated polkadot.rs (did not change)

* resolve conflicts in Cargo.lock

* make expect messages more clear

* correct typos

---------

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>
Co-authored-by: Alexandru Vasile <60601340+lexnv@users.noreply.github.com>

codegen/src/api/constants.rs

@@ -2,10 +2,10 @@
 // This file is dual-licensed as Apache-2.0 or GPL-3.0.
 // see LICENSE for license details.
 
-use crate::types::TypeGenerator;
 use heck::ToSnakeCase as _;
 use proc_macro2::TokenStream as TokenStream2;
 use quote::{format_ident, quote};
+use scale_typegen::TypeGenerator;
 use subxt_metadata::PalletMetadata;
 
 use super::CodegenError;
@@ -29,16 +29,13 @@ use super::CodegenError;
 ///
 /// # Arguments
 ///
-/// - `metadata` - Runtime metadata from which the calls are generated.
-/// - `type_gen` - The type generator containing all types defined by metadata
-/// - `pallet` - Pallet metadata from which the calls are generated.
-/// - `types_mod_ident` - The ident of the base module that we can use to access the generated types from.
+/// - `type_gen` - [`scale_typegen::TypeGenerator`] that contains settings and all types from the runtime metadata.
+/// - `pallet` - Pallet metadata from which the constants are generated.
+/// - `crate_path` - The crate path under which subxt is located, e.g. `::subxt` when using subxt as a dependency.
 pub fn generate_constants(
     type_gen: &TypeGenerator,
     pallet: &PalletMetadata,
-    types_mod_ident: &syn::Ident,
     crate_path: &syn::Path,
-    should_gen_docs: bool,
 ) -> Result<TokenStream2, CodegenError> {
     // Early return if the pallet has no constants.
     if pallet.constants().len() == 0 {
@@ -58,9 +55,11 @@ pub fn generate_constants(
                 ));
             };
 
-            let return_ty = type_gen.resolve_type_path(constant.ty());
+            let return_ty = type_gen.resolve_type_path(constant.ty())?;
             let docs = constant.docs();
-            let docs = should_gen_docs
+            let docs = type_gen
+                .settings()
+                .should_gen_docs
                 .then_some(quote! { #( #[doc = #docs ] )* })
                 .unwrap_or_default();
 
@@ -77,6 +76,8 @@ pub fn generate_constants(
         })
         .collect::<Result<Vec<_>, _>>()?;
 
+    let types_mod_ident = type_gen.types_mod_ident();
+
     Ok(quote! {
         pub mod constants {
             use super::#types_mod_ident;