feat: Mortal extrinsic construction

examples/kusama_balance_transfer.rs

@@ -20,6 +20,8 @@ use substrate_subxt::{
     ClientBuilder,
     KusamaRuntime,
     PairSigner,
+    SignedOptions,
+    DEFAULT_ERA_PERIOD
 };
 
 #[async_std::main]
@@ -30,7 +32,12 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let dest = AccountKeyring::Bob.to_account_id().into();
 
     let client = ClientBuilder::<KusamaRuntime>::new().build().await?;
-    let hash = client.transfer(&signer, &dest, 10_000).await?;
+    let hash = client.transfer(
+        &signer,
+        SignedOptions { era_period: Some(DEFAULT_ERA_PERIOD) },
+        &dest,
+        10_000
+    ).await?;
 
     println!("Balance transfer extrinsic submitted: {}", hash);
 

examples/submit_and_watch.rs

@@ -23,6 +23,8 @@ use substrate_subxt::{
     ClientBuilder,
     DefaultNodeRuntime,
     PairSigner,
+    SignedOptions,
+    DEFAULT_ERA_PERIOD,
 };
 
 #[async_std::main]
@@ -33,7 +35,12 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let dest = AccountKeyring::Bob.to_account_id().into();
 
     let client = ClientBuilder::<DefaultNodeRuntime>::new().build().await?;
-    let result = client.transfer_and_watch(&signer, &dest, 10_000).await?;
+    let result = client.transfer_and_watch(
+        &signer,
+        SignedOptions { era_period: Some(DEFAULT_ERA_PERIOD) },
+        &dest,
+        10_000
+    ).await?;
 
     if let Some(event) = result.transfer()? {
         println!("Balance transfer success: value: {:?}", event.amount);

examples/transfer_subscribe.rs

@@ -27,6 +27,8 @@ use substrate_subxt::{
     EventSubscription,
     EventsDecoder,
     PairSigner,
+    SignedOptions,
+    DEFAULT_ERA_PERIOD,
 };
 
 #[async_std::main]
@@ -42,7 +44,12 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     decoder.with_balances();
     let mut sub = EventSubscription::<DefaultNodeRuntime>::new(sub, decoder);
     sub.filter_event::<TransferEvent<_>>();
-    client.transfer(&signer, &dest, 10_000).await?;
+    client.transfer(
+        &signer,
+        SignedOptions { era_period: Some(DEFAULT_ERA_PERIOD) },
+        &dest,
+        10_000
+    ).await?;
     let raw = sub.next().await.unwrap().unwrap();
     let event = TransferEvent::<DefaultNodeRuntime>::decode(&mut &raw.data[..]);
     if let Ok(e) = event {