Download KeyValues in remote externalities early

Cargo.toml

@@ -599,6 +599,7 @@ asset-test-utils = { path = "cumulus/parachains/runtimes/assets/test-utils", def
 assets-common = { path = "cumulus/parachains/runtimes/assets/common", default-features = false }
 async-channel = { version = "1.8.0" }
 async-std = { version = "1.9.0" }
+async-stream = { version = "0.3.5" }
 async-trait = { version = "0.1.79" }
 asynchronous-codec = { version = "0.6" }
 backoff = { version = "0.4" }

prdoc/pr_3584.prdoc

@@ -0,0 +1,14 @@
+# Schema: Polkadot SDK PRDoc Schema (prdoc) v1.0.0
+# See doc at https://raw.githubusercontent.com/paritytech/polkadot-sdk/master/prdoc/schema_user.json
+
+title: Download KeyValues in remote externalities early
+
+doc:
+  - audience: Runtime User
+    description: |
+      This PR allows for downloading of Key Values early, as the Keys and Values are being fetched from a stream
+      they get inserted into the DB
+
+crates:
+  - name: frame-remote-externalities
+    bump: major

substrate/utils/frame/remote-externalities/Cargo.toml

@@ -30,6 +30,7 @@ futures = { workspace = true }
 indicatif = { workspace = true }
 spinners = { workspace = true }
 tokio-retry = { workspace = true }
+async-stream = { workspace = true }
 
 [dev-dependencies]
 sp-tracing = { workspace = true, default-features = true }