Ethereum keypair signing & verification (#664)

* Ethereum keypair signing & verification

* Verify against hashes expanded

* Adjust via flags

* ss58 encoding for 33-byte publicKey

* ecdsa types stores address as raw publicKey

* Adjust for hash lengths

* Adjust expand/compress specs

packages/util-crypto/src/address/encode.spec.ts

@@ -67,11 +67,17 @@ describe('encode', (): void => {
     ).toEqual('as7QnGMf');
   });
 
-  it('enodes a 8-byte address', (): void => {
+  it('encodes a 8-byte address', (): void => {
     expect(
       encode(
         new Uint8Array([42, 44, 10, 0, 0, 0, 0, 0]), 68
       )
     ).toEqual('4q7qY5RBG7Z4wv');
   });
+
+  it('encodes an 33-byte address', (): void => {
+    expect(
+      encode('0x03b9dc646dd71118e5f7fda681ad9eca36eb3ee96f344f582fbe7b5bcdebb13077')
+    ).toEqual('KWCv1L3QX9LDPwY4VzvLmarEmXjVJidUzZcinvVnmxAJJCBou');
+  });
 });