[wip] adding message signing functionality

Problem is this:

    Uncaught ReferenceError: require is not defined
        <anonymous> moz-extension://b4685fc7-232c-44d9-b653-f51b7c7ea868/dist/jex_include/local-vdk_aecrypt-0.1.0/dist/jex_include/local-blakejs-1.2.1/dist/index.js:1
    index.js:1:13

The issue is that blakejs is written for node and needs to be modified to work
in a browser.

Next task is doing that, but did a ton of work so taking a break

libs/blakejs/dist/index.d.ts

@@ -0,0 +1,96 @@
+export interface Blake2bCTX {
+    b: Uint8Array;
+    h: Uint32Array;
+    t: number;
+    c: number;
+    outlen: number;
+}
+
+/**
+ * Creates a Blake2b hashing context
+ * @param outlen between 1 and 64
+ * @param key optional
+ * @returns the hashing context
+ */
+export declare function blake2bInit(outlen?: number, key?: Uint8Array): Blake2bCTX;
+
+/**
+ * Updates a Blake2b streaming hash
+ * @param ctx hashing context from blake2bInit()
+ * @param input Byte array
+ */
+export declare function blake2bUpdate(ctx: Blake2bCTX, input: ArrayLike<number>): void;
+
+/**
+ * Completes a Blake2b streaming hash
+ * @param ctx hashing context from blake2bInit()
+ * @returns the final hash
+ */
+export declare function blake2bFinal(ctx: Blake2bCTX): Uint8Array;
+
+/**
+ *
+ * @param input the input bytes, as a string, Buffer, or Uint8Array
+ * @param key optional key Uint8Array, up to 64 bytes
+ * @param outlen optional output length in bytes, defaults to 64
+ * @returns an n-byte Uint8Array
+ */
+export declare function blake2b(input: string | Uint8Array, key?: Uint8Array, outlen?: number): Uint8Array;
+
+/**
+ * Computes the Blake2b hash of a string or byte array
+ *
+ * @param input the input bytes, as a string, Buffer, or Uint8Array
+ * @param key optional key Uint8Array, up to 64 bytes
+ * @param outlen outlen - optional output length in bytes, defaults to 64
+ * @returns an n-byte hash in hex, all lowercase
+ */
+export declare function blake2bHex(input: string | Uint8Array, key?: Uint8Array, outlen?: number): string;
+
+export interface Blake2sCTX {
+    h: Uint32Array;
+    b: Uint8Array;
+    c: number;
+    t: number;
+    outlen: number;
+}
+
+/**
+ * Creates a Blake2s hashing context
+ * @param outlen between 1 and 32
+ * @param key optional Uint8Array key
+ * @returns the hashing context
+ */
+export declare function blake2sInit(outlen: number, key?: Uint8Array): Blake2sCTX;
+
+/**
+ * Updates a Blake2s streaming hash
+ * @param ctx hashing context from blake2sinit()
+ * @param input byte array
+ */
+export declare function blake2sUpdate(ctx: Blake2sCTX, input: ArrayLike<number>): void;
+
+/**
+ * Completes a Blake2s streaming hash
+ * @param ctx hashing context from blake2sinit()
+ * @returns Uint8Array containing the message digest
+ */
+export declare function blake2sFinal(ctx: Blake2sCTX): Uint8Array;
+
+/**
+ * Computes the Blake2s hash of a string or byte array, and returns a Uint8Array
+ * @param input the input bytes, as a string, Buffer, or Uint8Array
+ * @param key optional key Uint8Array, up to 32 bytes
+ * @param outlen optional output length in bytes, defaults to 64
+ * @returns an n-byte Uint8Array
+ */
+export declare function blake2s(input: string | Uint8Array, key?: Uint8Array, outlen?: number): Uint8Array;
+
+/**
+ *
+ * @param input the input bytes, as a string, Buffer, or Uint8Array
+ * @param key optional key Uint8Array, up to 32 bytes
+ * @param outlen optional output length in bytes, defaults to 64
+ * @returns an n-byte hash in hex, all lowercase
+ */
+export declare function blake2sHex(input: string | Uint8Array, key?: Uint8Array, outlen?: number): string;