Update to latest frame-metadata changes

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

subxt/examples/metadata_config.rs

@@ -5,7 +5,10 @@ use subxt_core::config::{Config, DefaultExtrinsicParams};
 use subxt_signer::sr25519::dev;
 
 // Generate an interface that we can use from the node's metadata.
-#[subxt::subxt(runtime_metadata_insecure_url = "ws://localhost:9999")]
+#[subxt::subxt(
+    runtime_metadata_insecure_url = "ws://localhost:9944",
+    unstable_metadata
+)]
 pub mod polkadot {}
 
 // Derives aren't strictly needed, they just make developer life easier.
@@ -14,10 +17,10 @@ pub enum MetadataConfig {}
 
 impl Config for MetadataConfig {
     // Extracted from metadata directly:
-    type Hash = polkadot::custom_types::Hash;
-    type AccountId = polkadot::custom_types::AccountId;
-    type AssetId = polkadot::custom_types::AssetId;
-    type Address = polkadot::custom_types::Address;
+    type Hash = polkadot::system::associated_types::Hash;
+    type AccountId = polkadot::system::associated_types::AccountId;
+    type AssetId = polkadot::assets::associated_types::AssetId;
+    type Address = polkadot::system::associated_types::Address;
 
     // Present in metadata but this PoC needs to add
     // fn specific per name of type to impl the hashing fn.
@@ -25,7 +28,7 @@ impl Config for MetadataConfig {
     //
     // TODO: Eventually extend this to a DynamicHasher object instead.
     // Similar logic already exists for StorageHasher.
-    type Hasher = polkadot::custom_types::Hashing;
+    type Hasher = polkadot::system::associated_types::Hashing;
 
     // Present in metadata but this PoC needs to impl the header
     // trait to make use of this.
@@ -37,13 +40,11 @@ impl Config for MetadataConfig {
     // generated hasher to expose the same information, this is not
     // as robust and codgen can be used instead.
     // type Header = polkadot::custom_types::Header;
-    type Header =
-        SubstrateHeader<polkadot::custom_types::HeaderNumber, polkadot::custom_types::Hashing>;
+    type Header = SubstrateHeader<u32, polkadot::system::associated_types::Hashing>;
 
     // Same story, present in md but needs subxt::tx::Signer<T>.
     // type Signature = polkadot::custom_types::Signature;
     type Signature = <SubstrateConfig as Config>::Signature;
-
     // Not exposed in metadata, seems like heavily involved with
     // code functionality which cannot safely be expressed in the
     // metadata.
@@ -53,7 +54,7 @@ impl Config for MetadataConfig {
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Create a new API client, configured to talk to nodes.
-    let api = OnlineClient::<MetadataConfig>::from_insecure_url("ws://localhost:9999").await?;
+    let api = OnlineClient::<MetadataConfig>::from_insecure_url("ws://localhost:9944").await?;
 
     // Build a balance transfer extrinsic.
     let dest = dev::bob().public_key().into();