diff --git a/src/rt/rfwfs/hash.ts b/src/rt/rfwfs/hash.ts
index 5f64006..3de0e8c 100644
--- a/src/rt/rfwfs/hash.ts
+++ b/src/rt/rfwfs/hash.ts
@@ -1,11 +1,51 @@
-async function hash(inner_as_string: string) {
+import { type FileInner } from "./main"
+
+interface HashTable {
+	[index: string]: FileInner
+}
+interface Hash {
+	readonly inner: HashTable,
+	sha256: (file_inner: FileInner) => Promise<string>,
+	push: (hash: string) => void,
+	find: (hash: string) => FileInner | undefined,
+	pop: (hash: string) => FileInner | undefined,
+}
+
+async function sha256(inner_as_string: string): Promise<string> {
 	const encoder = new TextEncoder()
 	const hash = await crypto.subtle.digest("SHA-256", encoder.encode(inner_as_string))
 	const hash_as_uint8 = new Uint8Array(hash)
-    return Array.from(hash_as_uint8).map(byte => byte.toString(16).padStart(2, "0")).join("")
+	return Array.from(hash_as_uint8).map(byte => byte.toString(16).padStart(2, "0")).join("")
 }
 
-export default async function generate_sha256(inner_as_string: string) {
-	const sha256 = await hash(inner_as_string)
-	return sha256
+const hash_table = { inner: {} } as Hash
+
+hash_table.sha256 = async function(file_inner) {
+	return await sha256(file_inner.toString())
+}
+
+hash_table.find = function(hash) {
+	const hash_entry = this.inner[hash]
+	if (hash_entry) {
+		return hash_entry
+	}
+	return undefined
+}
+
+hash_table.pop = function(hash) {
+	const hash_entry = this.find(hash)
+	if (hash_entry) {
+		delete this.inner[hash_entry]
+		return hash_entry
+	}
+	return undefined
+}
+
+hash_table.push = function(hash) {
+
+}
+
+export default hash_table
+export {
+	type HashTable,
 }
\ No newline at end of file