Decode new ink! events with signature topic

crates/build/templates/new/_Cargo.toml

@@ -5,14 +5,11 @@ authors = ["[your_name] <[your_email]>"]
 edition = "2021"
 
 [dependencies]
-ink = { version = "4.3.0", default-features = false }
+ink = { version = "5.0.0-alpha", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.6", default-features = false, features = ["derive"], optional = true }
 
-[dev-dependencies]
-ink_e2e = "4.3.0"
-
 [lib]
 path = "lib.rs"
 

crates/cargo-contract/Cargo.toml

@@ -25,6 +25,7 @@ contract-metadata = { version = "4.0.0-alpha", path = "../metadata" }
 
 anyhow = "1.0.75"
 clap = { version = "4.4.2", features = ["derive", "env"] }
+primitive-types = { version = "0.12.1", default-features = false, features = ["codec", "scale-info", "serde"] }
 tracing = "0.1.37"
 tracing-subscriber = { version = "0.3.17", features = ["env-filter"] }
 which = "4.4.2"
@@ -39,9 +40,9 @@ semver = "1.0"
 # dependencies for extrinsics (deploying and calling a contract)
 tokio = { version = "1", features = ["macros", "rt-multi-thread"] }
 subxt = "0.31.0"
-sp-core = "21.0.0"
-sp-weights = "20.0.0"
-pallet-contracts-primitives = "24.0.0"
+sp-core = "22.0.0"
+sp-weights = "21.0.0"
+pallet-contracts-primitives = "25.0.0"
 hex = "0.4.3"
 
 [build-dependencies]

crates/cargo-contract/src/cmd/decode.rs

@@ -19,32 +19,58 @@ use anyhow::{
     Context,
     Result,
 };
+use clap::{
+    Args,
+    Subcommand,
+};
 use colored::Colorize as _;
 use contract_build::{
     util,
     CrateMetadata,
 };
 use contract_transcode::ContractMessageTranscoder;
 
-#[derive(Debug, Clone, clap::Args)]
-#[clap(
-    name = "decode",
-    about = "Decodes the input or output data of a contract"
-)]
+#[derive(Debug, Args)]
 pub struct DecodeCommand {
-    /// The type of data to encode.
-    #[clap(value_enum, short, long)]
-    r#type: DataType,
+    #[clap(subcommand)]
+    commands: DecodeCommands,
+}
+
+#[derive(Debug, Subcommand)]
+pub enum DecodeCommands {
+    #[clap(name = "message")]
+    Message(DecodeMessage),
+    /// Upload contract code
+    #[clap(name = "constructor")]
+    Constructor(DecodeConstructor),
+    /// Instantiate a contract
+    #[clap(name = "event")]
+    Event(DecodeEvent),
+}
+
+#[derive(Debug, Clone, Args)]
+pub struct DecodeMessage {
+    /// The data to decode; this has to be a hex value starting with `0x`.
+    #[clap(short, long)]
+    data: String,
+}
+
+#[derive(Debug, Clone, Args)]
+pub struct DecodeConstructor {
     /// The data to decode; this has to be a hex value starting with `0x`.
     #[clap(short, long)]
     data: String,
 }
 
-#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, clap::ValueEnum)]
-enum DataType {
-    Event,
-    Message,
-    Constructor,
+#[derive(Debug, Clone, Args)]
+pub struct DecodeEvent {
+    /// The signature topic of the event to be decoded; this has to be a hex value
+    /// starting with `0x`.
+    #[clap(short, long)]
+    signature_topic: String,
+    /// The data to decode; this has to be a hex value starting with `0x`.
+    #[clap(short, long)]
+    data: String,
 }
 
 impl DecodeCommand {
@@ -54,20 +80,25 @@ impl DecodeCommand {
         let transcoder = ContractMessageTranscoder::load(crate_metadata.metadata_path())?;
 
         const ERR_MSG: &str = "Failed to decode specified data as a hex value";
-        let decoded_data = match self.r#type {
-            DataType::Event => {
+        let decoded_data = match &self.commands {
+            DecodeCommands::Event(event) => {
+                let signature_topic_data =
+                    util::decode_hex(&event.signature_topic).context(ERR_MSG)?;
+                let signature_topic =
+                    primitive_types::H256::from_slice(&signature_topic_data);
                 transcoder.decode_contract_event(
-                    &mut &util::decode_hex(&self.data).context(ERR_MSG)?[..],
+                    &signature_topic,
+                    &mut &util::decode_hex(&event.data).context(ERR_MSG)?[..],
                 )?
             }
-            DataType::Message => {
+            DecodeCommands::Message(message) => {
                 transcoder.decode_contract_message(
-                    &mut &util::decode_hex(&self.data).context(ERR_MSG)?[..],
+                    &mut &util::decode_hex(&message.data).context(ERR_MSG)?[..],
                 )?
             }
-            DataType::Constructor => {
+            DecodeCommands::Constructor(constructor) => {
                 transcoder.decode_contract_constructor(
-                    &mut &util::decode_hex(&self.data).context(ERR_MSG)?[..],
+                    &mut &util::decode_hex(&constructor.data).context(ERR_MSG)?[..],
                 )?
             }
         };

crates/cargo-contract/tests/decode.rs

@@ -82,10 +82,9 @@ fn decode_works() {
     // message data is being decoded properly
     cargo_contract(&project_dir)
         .arg("decode")
+        .arg("message")
         .arg("--data")
         .arg(msg_data)
-        .arg("-t")
-        .arg("message")
         .assert()
         .success()
         .stdout(predicates::str::contains(msg_decoded));
@@ -98,42 +97,45 @@ fn decode_works() {
     // wrong message data is being handled properly
     cargo_contract(&project_dir)
         .arg("decode")
+        .arg("message")
         .arg("--data")
         .arg(wrong_msg_data)
-        .arg("-t")
-        .arg("message")
         .assert()
         .failure()
         .stderr(predicates::str::contains(error_msg));
 
     // when
-    let event_data: &str = "080001";
+    let signature_topic =
+        "325c98ff66bd0d9d1c10789ae1f2a17bdfb2dcf6aa3d8092669afafdef1cb72d";
+    let event_data: &str = "0001";
     let event_decoded: &str = r#"Switched { new_value: true }"#;
 
     // then
     // event data is being decoded properly
     cargo_contract(&project_dir)
         .arg("decode")
+        .arg("event")
+        .arg("--signature-topic")
+        .arg(signature_topic)
         .arg("--data")
         .arg(event_data)
-        .arg("-t")
-        .arg("event")
         .assert()
         .success()
         .stdout(predicates::str::contains(event_decoded));
 
     // and when
-    let wrong_event_data: &str = "0800010C";
+    let wrong_event_data: &str = "00010C";
     let error_msg: &str = "input length was longer than expected by 1 byte(s).\nManaged to decode `Switched`, `new_value` but `0C` bytes were left unread";
 
     // then
     // wrong event data is being handled properly
     cargo_contract(&project_dir)
         .arg("decode")
+        .arg("event")
+        .arg("--signature-topic")
+        .arg(signature_topic)
         .arg("--data")
         .arg(wrong_event_data)
-        .arg("-t")
-        .arg("event")
         .assert()
         .failure()
         .stderr(predicates::str::contains(error_msg));
@@ -146,10 +148,9 @@ fn decode_works() {
     // constructor data is being decoded properly
     cargo_contract(&project_dir)
         .arg("decode")
+        .arg("constructor")
         .arg("-d")
         .arg(constructor_data)
-        .arg("-t")
-        .arg("constructor")
         .assert()
         .success()
         .stdout(predicates::str::contains(constructor_decoded));
@@ -162,10 +163,9 @@ fn decode_works() {
     // wrong constructor data is being handled properly
     cargo_contract(&project_dir)
         .arg("decode")
+        .arg("constructor")
         .arg("-d")
         .arg(wrong_constructor_data)
-        .arg("-t")
-        .arg("constructor")
         .assert()
         .failure()
         .stderr(predicates::str::contains(error_msg));

crates/extrinsics/Cargo.toml

@@ -29,10 +29,10 @@ serde_json = "1.0.105"
 url = { version = "2.4.1", features = ["serde"] }
 rust_decimal = "1.32"
 tokio = { version = "1", features = ["macros", "rt-multi-thread"] }
-sp-core = "21.0.0"
-sp-runtime = "24.0.0"
-sp-weights = "20.0.0"
-pallet-contracts-primitives = "24.0.0"
+sp-core = "22.0.0"
+sp-runtime = "25.0.0"
+sp-weights = "21.0.0"
+pallet-contracts-primitives = "25.0.0"
 scale-info = "2.8.0"
 subxt = "0.31.0"
 subxt-signer = { version = "0.31.0", features = ["subxt", "sr25519"] }

crates/extrinsics/src/events.rs

@@ -110,6 +110,7 @@ impl DisplayEvents {
             };
 
             let event_data = &mut event.field_bytes();
+            let event_sig_topic = event.topics().iter().next();
             let mut unnamed_field_name = 0;
             for field_metadata in event_fields {
                 if <ContractEmitted as StaticEvent>::is_event(
@@ -121,6 +122,7 @@ impl DisplayEvents {
                     let field = contract_event_data_field(
                         transcoder,
                         field_metadata,
+                        event_sig_topic,
                         event_data,
                     )?;
                     event_entry.fields.push(field);
@@ -212,18 +214,24 @@ impl DisplayEvents {
 fn contract_event_data_field(
     transcoder: Option<&ContractMessageTranscoder>,
     field_metadata: &scale_info::Field<PortableForm>,
+    event_sig_topic: Option<&sp_core::H256>,
     event_data: &mut &[u8],
 ) -> Result<Field> {
     let event_value = if let Some(transcoder) = transcoder {
-        match transcoder.decode_contract_event(event_data) {
-            Ok(contract_event) => contract_event,
-            Err(err) => {
-                tracing::warn!(
-                    "Decoding contract event failed: {:?}. It might have come from another contract.",
-                    err
-                );
-                Value::Hex(Hex::from_str(&hex::encode(&event_data))?)
+        if let Some(event_sig_topic) = event_sig_topic {
+            match transcoder.decode_contract_event(event_sig_topic, event_data) {
+                Ok(contract_event) => contract_event,
+                Err(err) => {
+                    tracing::warn!(
+                        "Decoding contract event failed: {:?}. It might have come from another contract.",
+                        err
+                    );
+                    Value::Hex(Hex::from_str(&hex::encode(&event_data))?)
+                }
             }
+        } else {
+            tracing::info!("Anonymous event not decoded. Data displayed as raw hex.");
+            Value::Hex(Hex::from_str(&hex::encode(event_data))?)
         }
     } else {
         Value::Hex(Hex::from_str(&hex::encode(event_data))?)

crates/transcode/Cargo.toml

@@ -24,8 +24,8 @@ contract-metadata = { version = "4.0.0-alpha", path = "../metadata" }
 escape8259 = "0.5.2"
 hex = "0.4.3"
 indexmap = "2.0.0"
-ink_env = "4.3.0"
-ink_metadata = "4.3.0"
+ink_env = "5.0.0-alpha"
+ink_metadata = "5.0.0-alpha"
 itertools = "0.11.0"
 tracing = "0.1.37"
 nom = "7.1.3"
@@ -40,7 +40,7 @@ strsim = "0.10.0"
 
 [dev-dependencies]
 assert_matches = "1.5.0"
-ink = "4.3.0"
+ink = "5.0.0-alpha"
 sp-core = "22.0.0"
 sp-keyring = "25.0.0"