Adds the SetMetadataEvent (#265)

## Type of change

<!--Delete points that do not apply-->

- New feature

## Changes

The following changes have been made:

- Adds a `SetMetadataEvent` struct
- Emits `SetMetadataEvent` when `_set_metadata()` is called
- Enables the metadata tests now that the SDK supports wrapped heap
types.

## Notes

- This was requested by an external member.

## Related Issues

<!--Delete everything after the "#" symbol and replace it with a number.
No spaces between hash and number-->

Closes #264 

## Checklist

- [x] I have linked to any relevant issues.
- [x] I have commented my code, particularly in hard-to-understand
areas.
- [x] I have updated the documentation where relevant (API docs, the
reference, and the Sway book).
- [ ] If my change requires substantial documentation changes, I have
[requested support from the DevRel
team](https://github.com/FuelLabs/devrel-requests/issues/new/choose)
- [x] I have added tests that prove my fix is effective or that my
feature works.
- [x] I have added (or requested a maintainer to add) the necessary
`Breaking*` or `New Feature` labels where relevant.
- [x] I have done my best to ensure that my PR adheres to [the Fuel Labs
Code Review
Standards](https://github.com/FuelLabs/rfcs/blob/master/text/code-standards/external-contributors.md).
- [x] I have requested a review from the relevant team or maintainers.
- [x] I have updated the changelog to reflect the changes on this PR.

CHANGELOG.md

@@ -12,11 +12,11 @@ Description of the upcoming release here.
 ### Added
 
 - [#259](https://github.com/FuelLabs/sway-libs/pull/259) Adds a new upgradability library, including associated tests and documentation.
+- [#265](https://github.com/FuelLabs/sway-libs/pull/265) Adds the `SetMetadataEvent` and emits `SetMetadataEvent` when the `_set_metadata()` function is called.
 
 ### Changed
 
-- Something changed here 1
-- Something changed here 2
+- [#265](https://github.com/FuelLabs/sway-libs/pull/265) Enables the metadata events now that the Rust SDK supports wrapped heap types.
 
 ### Fixed
 

libs/src/asset/metadata.sw

@@ -2,6 +2,7 @@ library;
 
 use standards::src7::Metadata;
 use std::{
+    auth::msg_sender,
     bytes::Bytes,
     hash::{
         Hash,
@@ -18,6 +19,18 @@ use std::{
     string::String,
 };
 
+/// The event emitted when metadata is set via the `_set_metadata()` function.
+pub struct SetMetadataEvent {
+    /// The asset for which metadata is set.
+    asset: AssetId,
+    /// The `Identity` of the caller that set the metadata.
+    sender: Identity,
+    /// The Metadata that is set.
+    metadata: Metadata,
+    /// The key used for the metadata.
+    key: String,
+}
+
 /// A persistent storage type to store the SRC-7; Metadata Standard type.
 ///
 /// # Additional Information
@@ -166,6 +179,12 @@ pub fn _set_metadata(
     key: String,
     metadata: Metadata,
 ) {
+    log(SetMetadataEvent {
+        asset,
+        sender: msg_sender().unwrap(),
+        metadata,
+        key,
+    });
     metadata_key.insert(asset, key, metadata);
 }
 

tests/src/native_asset/tests/functions/metadata.rs

@@ -8,7 +8,6 @@ mod success {
 
     use super::*;
 
-    #[ignore]
     #[tokio::test]
     async fn gets_one_asset() {
         let (owner_wallet, other_wallet, id, instance_1, _instance_2) = setup().await;
@@ -26,7 +25,6 @@ mod success {
         );
     }
 
-    #[ignore]
     #[tokio::test]
     async fn gets_multiple_assets() {
         let (owner_wallet, other_wallet, id, instance_1, _instance_2) = setup().await;
@@ -60,16 +58,17 @@ mod success {
         );
     }
 
-    #[ignore]
     #[tokio::test]
     async fn gets_multiple_types() {
         let (owner_wallet, other_wallet, id, instance_1, _instance_2) = setup().await;
         let (asset_id_1, _asset_id_2, _sub_id_1, _sub_id_2, _identity1, _other_identity) =
             defaults(id, owner_wallet, other_wallet.clone());
         let metadata1 = Metadata::String(String::from("Fuel NFT Metadata 1"));
         let metadata2 = Metadata::Int(1);
-        let metadata3 =
-            Metadata::Bytes(Bytes::from_hex_str("bytes").expect("failed to conver to bytes"));
+        let metadata3 = Metadata::Bytes(
+            Bytes::from_hex_str("0101010101010101010101010101010101010101010101010101010101010101")
+                .expect("failed to convert to bytes"),
+        );
         let key1 = String::from("key1");
         let key2 = String::from("key2");
         let key3 = String::from("key3");