fix(sdk-core): coins specific message sign validate

SC-2419

Author: evanzbitgo

modules/sdk-coin-ada/src/lib/messages/cip8/cip8MessageBuilder.ts

@@ -6,6 +6,14 @@ import { BaseMessageBuilder, IMessage, MessageOptions, MessageStandardType } fro
  * Builder for CIP-8 messages
  */
 export class Cip8MessageBuilder extends BaseMessageBuilder {
+  private static readonly MIDNIGHT_TNC_HASH = '31a6bab50a84b8439adcfb786bb2020f6807e6e8fda629b424110fc7bb1c6b8b';
+
+  /*
+   * matches a message that starts with "STAR ", followed by a number,
+   * then " to addr" or " to addr_test1", followed by a 50+ character alphanumeric address,
+   * and ends with the midnight TnC hash
+   */
+  private static readonly MIDNIGHT_GLACIER_DROP_CLAIM_MESSAGE_TEMPLATE = `STAR \\d+ to addr(?:1|_test1)[a-z0-9]{50,} ${Cip8MessageBuilder.MIDNIGHT_TNC_HASH}`;
   /**
    * Base constructor.
    * @param _coinConfig BaseCoin from statics library
@@ -22,4 +30,15 @@ export class Cip8MessageBuilder extends BaseMessageBuilder {
   async buildMessage(options: MessageOptions): Promise<IMessage> {
     return new Cip8Message(options);
   }
+
+  /**
+   * Validates the signable payload
+   * @param message The message to validate
+   * @returns A boolean indicating whether the signable payload is valid
+   */
+  public validateSignablePayload(message: string | Buffer): boolean {
+    const messageStr = Buffer.isBuffer(message) ? message.toString('utf8') : message;
+    const regex = new RegExp(`^${Cip8MessageBuilder.MIDNIGHT_GLACIER_DROP_CLAIM_MESSAGE_TEMPLATE}$`, 's');
+    return regex.test(messageStr);
+  }
 }

modules/sdk-core/src/account-lib/baseCoin/messages/baseMessageBuilder.ts

@@ -118,6 +118,15 @@ export abstract class BaseMessageBuilder implements IMessageBuilder {
     return this;
   }
 
+  /**
+   * Validates the signable payload
+   * @param message The message to validate
+   * @returns A boolean indicating whether the signable payload is valid
+   */
+  public validateSignablePayload(message: string | Buffer): boolean {
+    return true;
+  }
+
   /**
    * Builds a message using the previously set payload and metadata
    * @returns A Promise resolving to the built IMessage

modules/sdk-core/src/account-lib/baseCoin/messages/iface.ts

@@ -61,6 +61,13 @@ export interface IMessage {
    */
   getSignablePayload(): Promise<string | Buffer>;
 
+  /**
+   * Validates the signable payload
+   * @param message The message to validate
+   * @returns A boolean indicating whether the signable payload is valid
+   */
+  validateSignablePayload(message: string | Buffer): boolean;
+
   /**
    * Creates a broadcastable message format that includes the signatures
    * Uses internal signatures and signers that were previously set