Support constructing and submitting V5 transactions (#1931)

* TransactionExtensions basic support for V5 VerifySignature and renames

* WIP: subxt-core v5 transaction support

* Subxt to support V5 extrinsics

* WIP tests failing with wsm trap error

* Actually encode mortality to fix tx encode issue

* fmt

* rename to sign_with_account_and_signature

* Add explicit methods for v4 and v5 ext construction

* clippy

* fix wasm example and no mut self where not needed

* fix doc example

* another doc fix

* Add tests for tx encoding and fix v5 encode issue

* add copyright and todo

* refactor APIs to have clear v4/v5 split in core and slightly nicer split in subxt proper

* rename Partial/SubmittableExtrinsic to *Transaction

* Remove SignerT::address since it's not needed

* doc fixes

* fmt

* doc fixes

* Fix comment number

* Clarify panic behaviour of inject_signature

* fmt

examples/wasm-example/Cargo.lock

@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "addr2line"
@@ -1784,15 +1784,6 @@ dependencies = [
  "thiserror 1.0.58",
 ]
 
-[[package]]
-name = "polkadot-sdk"
-version = "0.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eb819108697967452fa6d8d96ab4c0d48cbaa423b3156499dcb24f1cf95d6775"
-dependencies = [
- "sp-crypto-hashing",
-]
-
 [[package]]
 name = "poly1305"
 version = "0.8.0"
@@ -2485,15 +2476,11 @@ dependencies = [
  "async-trait",
  "derive-where",
  "either",
- "finito",
  "frame-metadata",
  "futures",
- "getrandom",
  "hex",
- "impl-serde",
  "jsonrpsee",
  "parity-scale-codec",
- "polkadot-sdk",
  "primitive-types",
  "scale-bits",
  "scale-decode",
@@ -2502,10 +2489,12 @@ dependencies = [
  "scale-value",
  "serde",
  "serde_json",
+ "sp-crypto-hashing",
  "subxt-core",
  "subxt-lightclient",
  "subxt-macro",
  "subxt-metadata",
+ "subxt-rpcs",
  "thiserror 2.0.11",
  "tokio",
  "tracing",
@@ -2544,7 +2533,6 @@ dependencies = [
  "impl-serde",
  "keccak-hash",
  "parity-scale-codec",
- "polkadot-sdk",
  "primitive-types",
  "scale-bits",
  "scale-decode",
@@ -2553,6 +2541,7 @@ dependencies = [
  "scale-value",
  "serde",
  "serde_json",
+ "sp-crypto-hashing",
  "subxt-metadata",
  "thiserror 2.0.11",
  "tracing",
@@ -2605,11 +2594,36 @@ dependencies = [
  "frame-metadata",
  "hashbrown 0.14.5",
  "parity-scale-codec",
- "polkadot-sdk",
  "scale-info",
+ "sp-crypto-hashing",
  "thiserror 2.0.11",
 ]
 
+[[package]]
+name = "subxt-rpcs"
+version = "0.39.0"
+dependencies = [
+ "derive-where",
+ "finito",
+ "frame-metadata",
+ "futures",
+ "getrandom",
+ "hex",
+ "impl-serde",
+ "jsonrpsee",
+ "parity-scale-codec",
+ "primitive-types",
+ "serde",
+ "serde_json",
+ "subxt-core",
+ "subxt-lightclient",
+ "thiserror 2.0.11",
+ "tokio-util",
+ "tracing",
+ "url",
+ "wasm-bindgen-futures",
+]
+
 [[package]]
 name = "subxt-utils-fetchmetadata"
 version = "0.39.0"
@@ -2765,6 +2779,20 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "tokio-util"
+version = "0.7.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7fcaa8d55a2bdd6b83ace262b016eca0d79ee02818c5c1bcdf0305114081078"
+dependencies = [
+ "bytes",
+ "futures-core",
+ "futures-io",
+ "futures-sink",
+ "pin-project-lite",
+ "tokio",
+]
+
 [[package]]
 name = "toml_datetime"
 version = "0.6.8"
@@ -2821,6 +2849,7 @@ checksum = "97fee6b57c6a41524a810daee9286c02d7752c4253064d0b05472833a438f675"
 dependencies = [
  "cfg-if",
  "digest 0.10.7",
+ "rand",
  "static_assertions",
 ]
 

examples/wasm-example/src/routes/signing.rs

@@ -6,7 +6,7 @@ use subxt::{OnlineClient, PolkadotConfig};
 use subxt::config::DefaultExtrinsicParamsBuilder;
 use subxt::ext::codec::{Decode, Encode};
 use subxt::tx::Payload as _;
-use subxt::tx::SubmittableExtrinsic;
+use subxt::tx::SubmittableTransaction;
 use subxt::utils::{AccountId32, MultiSignature};
 
 use crate::services::{extension_signature_for_extrinsic, get_accounts, polkadot, Account};
@@ -51,7 +51,7 @@ pub enum SigningStage {
 
 pub enum SubmittingStage {
     Initial {
-        signed_extrinsic: SubmittableExtrinsic<PolkadotConfig, OnlineClient<PolkadotConfig>>,
+        signed_extrinsic: SubmittableTransaction<PolkadotConfig, OnlineClient<PolkadotConfig>>,
     },
     Submitting,
     Success {
@@ -70,7 +70,7 @@ pub enum Message {
     SignWithAccount(usize),
     ReceivedSignature(
         MultiSignature,
-        SubmittableExtrinsic<PolkadotConfig, OnlineClient<PolkadotConfig>>,
+        SubmittableTransaction<PolkadotConfig, OnlineClient<PolkadotConfig>>,
     ),
     SubmitSigned,
     ExtrinsicFinalized {
@@ -166,15 +166,15 @@ impl Component for SigningExamplesComponent {
                         let params = DefaultExtrinsicParamsBuilder::new()
                             .nonce(account_nonce)
                             .build();
-                        let Ok(partial_signed) =
-                            api.tx().create_partial_signed_offline(&remark_call, params)
+                        let Ok(mut partial_signed) =
+                            api.tx().create_partial_offline(&remark_call, params)
                         else {
-                            return Message::Error(anyhow!("PartialExtrinsic creation failed"));
+                            return Message::Error(anyhow!("PartialTransaction creation failed"));
                         };
 
                         // Apply the signature
                         let signed_extrinsic = partial_signed
-                            .sign_with_address_and_signature(&account_id.into(), &multi_signature);
+                            .sign_with_account_and_signature(&account_id, &multi_signature);
 
                         // check the TX validity (to debug in the js console if the extrinsic would work)
                         let dry_res = signed_extrinsic.validate().await;
@@ -394,7 +394,7 @@ impl Component for SigningExamplesComponent {
 }
 
 async fn submit_wait_finalized_and_get_extrinsic_success_event(
-    extrinsic: SubmittableExtrinsic<PolkadotConfig, OnlineClient<PolkadotConfig>>,
+    extrinsic: SubmittableTransaction<PolkadotConfig, OnlineClient<PolkadotConfig>>,
 ) -> Result<polkadot::system::events::ExtrinsicSuccess, anyhow::Error> {
     let events = extrinsic
         .submit_and_watch()

examples/wasm-example/src/services.rs

@@ -140,7 +140,7 @@ pub async fn extension_signature_for_extrinsic(
     let signed_extensions: Vec<String> = api
         .metadata()
         .extrinsic()
-        .signed_extensions()
+        .transaction_extensions()
         .iter()
         .map(|e| e.identifier().to_string())
         .collect();