Configurable Config and Extra types (#373)

* WIP config

* WIP separate default config

* Separate trait impls on client

* WIP introduce new ApiConfig (to be renamed) trait

* Update generated polkadot codegen

* Allow configuring Config and Extra types independently

* Add extra default configuration

* Revert ir parsing of config attr

* Add default-features = false to substrate deps

* Revert "Add default-features = false to substrate deps"

This reverts commit 099d20cd4cbf8000ff938d1dc090ecbc28a5e788.

examples/fetch_all_accounts.rs

@@ -22,7 +22,11 @@
 //! polkadot --dev --tmp
 //! ```
 
-use subxt::ClientBuilder;
+use subxt::{
+    ClientBuilder,
+    DefaultConfig,
+    DefaultExtra,
+};
 
 #[subxt::subxt(runtime_metadata_path = "examples/polkadot_metadata.scale")]
 pub mod polkadot {}
@@ -34,7 +38,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let api = ClientBuilder::new()
         .build()
         .await?
-        .to_runtime_api::<polkadot::RuntimeApi<polkadot::DefaultConfig>>();
+        .to_runtime_api::<polkadot::RuntimeApi<DefaultConfig, DefaultExtra<DefaultConfig>>>();
 
     let mut iter = api.storage().system().account_iter(None).await?;
 

examples/fetch_remote.rs

@@ -14,7 +14,11 @@
 // You should have received a copy of the GNU General Public License
 // along with subxt.  If not, see <http://www.gnu.org/licenses/>.
 
-use subxt::ClientBuilder;
+use subxt::{
+    ClientBuilder,
+    DefaultConfig,
+    DefaultExtra,
+};
 
 #[subxt::subxt(runtime_metadata_path = "examples/polkadot_metadata.scale")]
 pub mod polkadot {}
@@ -27,7 +31,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
         .set_url("wss://rpc.polkadot.io:443")
         .build()
         .await?
-        .to_runtime_api::<polkadot::RuntimeApi<polkadot::DefaultConfig>>();
+        .to_runtime_api::<polkadot::RuntimeApi<DefaultConfig, DefaultExtra<DefaultConfig>>>();
 
     let block_number = 1;
 

examples/polkadot_balance_transfer.rs

@@ -25,6 +25,8 @@
 use sp_keyring::AccountKeyring;
 use subxt::{
     ClientBuilder,
+    DefaultConfig,
+    DefaultExtra,
     PairSigner,
 };
 
@@ -41,7 +43,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let api = ClientBuilder::new()
         .build()
         .await?
-        .to_runtime_api::<polkadot::RuntimeApi<polkadot::DefaultConfig>>();
+        .to_runtime_api::<polkadot::RuntimeApi<DefaultConfig, DefaultExtra<DefaultConfig>>>();
     let hash = api
         .tx()
         .balances()

examples/submit_and_watch.rs

@@ -26,6 +26,8 @@ use futures::StreamExt;
 use sp_keyring::AccountKeyring;
 use subxt::{
     ClientBuilder,
+    DefaultConfig,
+    DefaultExtra,
     PairSigner,
 };
 
@@ -53,7 +55,7 @@ async fn simple_transfer() -> Result<(), Box<dyn std::error::Error>> {
     let api = ClientBuilder::new()
         .build()
         .await?
-        .to_runtime_api::<polkadot::RuntimeApi<polkadot::DefaultConfig>>();
+        .to_runtime_api::<polkadot::RuntimeApi<DefaultConfig, DefaultExtra<_>>>();
 
     let balance_transfer = api
         .tx()
@@ -85,7 +87,7 @@ async fn simple_transfer_separate_events() -> Result<(), Box<dyn std::error::Err
     let api = ClientBuilder::new()
         .build()
         .await?
-        .to_runtime_api::<polkadot::RuntimeApi<polkadot::DefaultConfig>>();
+        .to_runtime_api::<polkadot::RuntimeApi<DefaultConfig, DefaultExtra<_>>>();
 
     let balance_transfer = api
         .tx()
@@ -136,7 +138,7 @@ async fn handle_transfer_events() -> Result<(), Box<dyn std::error::Error>> {
     let api = ClientBuilder::new()
         .build()
         .await?
-        .to_runtime_api::<polkadot::RuntimeApi<polkadot::DefaultConfig>>();
+        .to_runtime_api::<polkadot::RuntimeApi<DefaultConfig, DefaultExtra<_>>>();
 
     let mut balance_transfer_progress = api
         .tx()

examples/transfer_subscribe.rs

@@ -25,6 +25,8 @@
 use sp_keyring::AccountKeyring;
 use subxt::{
     ClientBuilder,
+    DefaultConfig,
+    DefaultExtra,
     EventSubscription,
     PairSigner,
 };
@@ -42,11 +44,11 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let api = ClientBuilder::new()
         .build()
         .await?
-        .to_runtime_api::<polkadot::RuntimeApi<polkadot::DefaultConfig>>();
+        .to_runtime_api::<polkadot::RuntimeApi<DefaultConfig, DefaultExtra<DefaultConfig>>>();
 
     let sub = api.client.rpc().subscribe_events().await?;
     let decoder = api.client.events_decoder();
-    let mut sub = EventSubscription::<polkadot::DefaultConfig>::new(sub, decoder);
+    let mut sub = EventSubscription::<DefaultConfig>::new(sub, decoder);
     sub.filter_event::<polkadot::balances::events::Transfer>();
 
     api.tx()