refactor(protos): rename astria.bundle -> astria.auction and Bundle -> Bid

proto/executionapis/astria/auction/v1alpha1/bid.proto

@@ -0,0 +1,34 @@
+syntax = "proto3";
+
+package astria.auction.v1alpha1;
+
+message GetBidStreamRequest {}
+
+// A bid is a bundle of transactions that was submitted to the auctioneer's rollup node.
+// The rollup node will verify that the bundle is valid and pays the fee, and will stream
+// it to the auctioneer for participation in the auction for a given block.
+// The sequencer block hash and the rollup parent block hash are used by the auctioneer
+// to identify the block for which the bundle is intended (i.e. which auction the bid is for).
+message Bid {
+  // The fee paid by the bundle submitter. The auctioneer's rollup node calculates this based
+  // on the bundles submitted by users. For example, this can be the sum of the coinbase transfers
+  // in the bundle's transactions.
+  uint64 fee = 1;
+  // The list of serialized rollup transactions from the bundle.
+  repeated bytes transactions = 2;
+  // The hash of the previous sequencer block, identifying the auction for which the bid is intended.
+  // This is the hash of the sequencer block on top of which the bundle will be executed as ToB.
+  bytes sequencer_parent_block_hash = 3;
+  // The hash of previous rollup block, on top of which the bundle will be executed as ToB.
+  bytes rollup_parent_block_hash = 4;
+}
+
+message GetBidStreamResponse {
+  Bid Bid = 1;
+}
+
+service BundleService {
+  // An auctioneer will initiate this long running stream to receive bids from the rollup node,
+  // until either a timeout or the connection is closed by the client.
+  rpc GetBidStream(GetBidStreamRequest) returns (stream GetBidStreamResponse);
+}

proto/executionapis/astria/bundle/v1alpha1/optimistic_execution.proto → proto/executionapis/astria/auction/v1alpha1/optimistic_execution.proto

@@ -1,6 +1,6 @@
 syntax = "proto3";
 
-package astria.bundle.v1alpha1;
+package astria.auction.v1alpha1;
 
 import "astria/execution/v1/execution.proto";
 import "astria/sequencerblock/v1/block.proto";