New modding system

client/handshake.ts

@@ -1,6 +1,5 @@
 // connecting to a server and getting what it needs before joining, see "Delivery to clients" in MODS.md:
 // hello -> welcome, download and check everything, ready -> join
-import type { AtlasListing } from "$/common/mod_loader.ts";
 import { ClientMessage, PROTOCOL_VERSION, ServerMessage } from "$/common/protocol.ts";
 
 const CONNECT_TIMEOUT_MS = 5000;
@@ -189,17 +188,6 @@ export function code_url(bytes: Uint8Array<ArrayBuffer>): string {
 	return URL.createObjectURL(new Blob([bytes], { type: "text/javascript" }));
 }
 
-export async function load_atlas(address: ServerAddress, atlas: AtlasListing) {
-	const [png, json] = await Promise.all([
-		fetch_verified(new URL(atlas.png, address.base), atlas.sha256.png, "the texture atlas"),
-		fetch_verified(new URL(atlas.json, address.base), atlas.sha256.json, "the texture atlas"),
-	]);
-	return {
-		image: await createImageBitmap(new Blob([png], { type: "image/png" })),
-		regions: JSON.parse(new TextDecoder().decode(json)) as Record<string, { x: number; y: number }>,
-	};
-}
-
 // players ok a cross-origin server's mods once, per server and exact mod versions
 
 function trust_key(address: ServerAddress) {
@@ -207,7 +195,7 @@ function trust_key(address: ServerAddress) {
 }
 
 function mod_versions(welcome: Welcome) {
-	return welcome.mods.map((mod) => `${mod.id}@${mod.hash}`).sort().join(",");
+	return welcome.mods.map((mod) => `${mod.id}@${mod.sha256}`).sort().join(",");
 }
 
 export function is_trusted(address: ServerAddress, welcome: Welcome): boolean {