feat(sdk-coin-ada): add CIP-8 message builder

TICKET: COIN-4724

Author: bhavidhingra

modules/sdk-coin-ada/test/unit/messages/cip8/index.ts

@@ -0,0 +1,4 @@
+export * from './cip8Message';
+export * from './cip8MessageBuilder';
+export * from './messageBuilderFactory';
+export * from './utils';

modules/sdk-coin-ada/test/unit/messages/cip8/messageBuilderFactory.ts

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+import should from 'should';
+import sinon from 'sinon';
+import { BaseCoin } from '@bitgo/statics';
+import { MessageStandardType } from '@bitgo/sdk-core';
+import { Cip8MessageBuilder, MessageBuilderFactory } from '../../../../src/lib/messages';
+
+describe('MessageBuilderFactory', function () {
+  let sandbox: sinon.SinonSandbox;
+  let factory: MessageBuilderFactory;
+  const coinConfig = { name: 'tada' } as BaseCoin;
+
+  beforeEach(function () {
+    sandbox = sinon.createSandbox();
+    factory = new MessageBuilderFactory(coinConfig);
+  });
+
+  afterEach(function () {
+    sandbox.restore();
+  });
+
+  describe('getMessageBuilder', function () {
+    it('should return CIP8 message builder for CIP8 type', function () {
+      const builder = factory.getMessageBuilder(MessageStandardType.CIP8);
+      should.exist(builder);
+      builder.should.be.instanceof(Cip8MessageBuilder);
+    });
+
+    it('should throw error for unsupported message type', function () {
+      const unsupportedTypes = ['UNSUPPORTED' as MessageStandardType];
+
+      unsupportedTypes.forEach((type) => {
+        should.throws(() => factory.getMessageBuilder(type), /Invalid message standard UNSUPPORTED/);
+      });
+    });
+  });
+});

modules/sdk-coin-ada/test/unit/messages/index.ts

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+export * from './cip8';