feat(perms): add stream_bundles to BuilderTxCache (#124)

* feat(perms): add stream_bundles to BuilderTxCache

Add a stream_bundles() method that automatically paginates through all
bundles, yielding individual CachedBundle items as a Stream. Follows the
same unfold+flatten pattern used by upstream TxCache for transactions
and orders.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* chore: bump version to 0.18.0-rc.11

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: Evalir

Cargo.toml

@@ -3,7 +3,7 @@ name = "init4-bin-base"
 
 description = "Internal utilities for binaries produced by the init4 team"
 keywords = ["init4", "bin", "base"]
-version = "0.18.0-rc.10"
+version = "0.18.0-rc.11"
 edition = "2021"
 rust-version = "1.85"
 authors = ["init4", "James Prestwich", "evalir"]
@@ -56,6 +56,7 @@ async-trait = { version = "0.1.80", optional = true }
 # AWS
 aws-config = { version = "1.1.7", optional = true }
 aws-sdk-kms = { version = "1.15.0", optional = true }
+futures-util = { version = "0.3", optional = true }
 reqwest = { version = "0.12.15", optional = true }
 rustls = { version = "0.23.31", optional = true }
 
@@ -71,7 +72,7 @@ tokio = { version = "1.43.0", features = ["macros"] }
 default = ["alloy", "rustls"]
 alloy = ["dep:alloy"]
 aws = ["alloy", "alloy?/signer-aws", "dep:async-trait", "dep:aws-config", "dep:aws-sdk-kms"]
-perms = ["dep:oauth2", "dep:tokio", "dep:reqwest", "dep:signet-tx-cache"]
+perms = ["dep:oauth2", "dep:tokio", "dep:reqwest", "dep:signet-tx-cache", "dep:futures-util"]
 pylon = ["perms", "alloy/kzg"]
 block_watcher = ["dep:tokio"]
 rustls = ["dep:rustls", "rustls/aws-lc-rs"]

src/perms/tx_cache.rs

@@ -1,4 +1,6 @@
 use crate::perms::oauth::SharedToken;
+use futures_util::future::Either;
+use futures_util::stream::{self, Stream, StreamExt};
 use serde::de::DeserializeOwned;
 use signet_tx_cache::{
     error::TxCacheError,
@@ -148,6 +150,24 @@ impl BuilderTxCache {
         format!("{BUNDLES}/{bundle_id}")
     }
 
+    /// Stream all bundles from the cache, automatically paginating through
+    /// all available pages. Yields individual [`CachedBundle`] items.
+    pub fn stream_bundles(&self) -> impl Stream<Item = Result<CachedBundle>> + Send + '_ {
+        stream::unfold(Some(None), move |cursor| async move {
+            let cursor = cursor?;
+
+            match self.get_bundles(cursor).await {
+                Ok(response) => {
+                    let (inner, next_cursor) = response.into_parts();
+                    let bundles = stream::iter(inner.bundles).map(Ok);
+                    Some((Either::Left(bundles), next_cursor.map(Some)))
+                }
+                Err(error) => Some((Either::Right(stream::once(async { Err(error) })), None)),
+            }
+        })
+        .flatten()
+    }
+
     /// Get a bundle from the cache by its UUID. For convenience, this method
     /// takes a string reference, which is expected to be a valid UUID.
     #[instrument(skip_all)]