2 files changed, 31 insertions, 0 deletions
diff --git a/op_crates/crypto/lib.deno_crypto.d.ts b/op_crates/crypto/lib.deno_crypto.d.ts
new file mode 100644
index 000000000..a00757e71
--- /dev/null
+++ b/op_crates/crypto/lib.deno_crypto.d.ts
@@ -0,0 +1,26 @@
+// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
+
+/// <reference no-default-lib="true" />
+/// <reference lib="esnext" />
+
+declare var crypto: Crypto;
+
+declare interface Crypto {
+  readonly subtle: null;
+  getRandomValues<
+    T extends
+      | Int8Array
+      | Int16Array
+      | Int32Array
+      | Uint8Array
+      | Uint16Array
+      | Uint32Array
+      | Uint8ClampedArray
+      | Float32Array
+      | Float64Array
+      | DataView
+      | null,
+  >(
+    array: T,
+  ): T;
+}
diff --git a/op_crates/crypto/lib.rs b/op_crates/crypto/lib.rs
index 61290080d..b8fe3fefb 100644
--- a/op_crates/crypto/lib.rs
+++ b/op_crates/crypto/lib.rs
@@ -11,6 +11,7 @@ use deno_core::ZeroCopyBuf;
 use rand::rngs::StdRng;
 use rand::thread_rng;
 use rand::Rng;
+use std::path::PathBuf;
 
 pub use rand; // Re-export rand
 
@@ -41,3 +42,7 @@ pub fn op_crypto_get_random_values(
 
   Ok(json!({}))
 }
+
+pub fn get_declaration() -> PathBuf {
+  PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("lib.deno_crypto.d.ts")
+}