feat: implement tao specific functions

TICKET: WIN-4296

modules/abstract-substrate/src/abstractSubstrateCoin.ts

@@ -98,15 +98,7 @@ export class SubstrateCoin extends BaseCoin {
 
   /** @inheritDoc **/
   generateKeyPair(seed?: Buffer): KeyPair {
-    const keyPair = seed ? utils.keyPairFromSeed(new Uint8Array(seed)) : new SubstrateKeyPair();
-    const keys = keyPair.getKeys();
-    if (!keys.prv) {
-      throw new Error('Missing prv in key generation.');
-    }
-    return {
-      pub: keys.pub,
-      prv: keys.prv,
-    };
+    throw new Error('Method not implemented.');
   }
 
   /** @inheritDoc **/

modules/abstract-substrate/src/lib/keyPair.ts

@@ -17,7 +17,7 @@ import * as nacl from 'tweetnacl';
 const TYPE = 'ed25519';
 const keyring = new Keyring({ type: TYPE });
 
-export class KeyPair extends Ed25519KeyPair {
+export abstract class KeyPair extends Ed25519KeyPair {
   /**
    * Public constructor. By default, creates a key pair with a random master seed.
    *
@@ -46,10 +46,11 @@ export class KeyPair extends Ed25519KeyPair {
    * or substrate format used for westend (starts with 5)
    */
   getAddress(format: DotAddressFormat): string {
-    let encodedAddress = this.createPolkadotPair().address;
-    encodedAddress = keyring.encodeAddress(encodedAddress, format as number);
+    // let encodedAddress = this.createPolkadotPair().address;
+    // encodedAddress = keyring.encodeAddress(encodedAddress, format as number);
 
-    return encodedAddress;
+    // return encodedAddress;
+    throw new Error('Method not implemented.');
   }
 
   /** @inheritdoc */

modules/sdk-coin-tao/src/lib/index.ts

@@ -1,7 +1,7 @@
 import * as Utils from './utils';
 import * as Interface from './iface';
 
-export { KeyPair } from './keyPair';
+export { TaoKeyPair } from './keyPair';
 export { Transaction } from './transaction';
 export { TransactionBuilder } from './transactionBuilder';
 export { TransferBuilder } from './transferBuilder';

modules/sdk-coin-tao/src/lib/keyPair.ts

@@ -1,23 +1,35 @@
-import { DefaultKeys, Ed25519KeyPair } from '@bitgo/sdk-core';
+import { DotAddressFormat } from '@bitgo/sdk-core';
+import { KeyPair } from '@bitgo/abstract-substrate';
+import { Keyring } from '@polkadot/keyring';
+import { createPair } from '@polkadot/keyring/pair';
+import { KeyringPair } from '@polkadot/keyring/types';
 
-export class KeyPair extends Ed25519KeyPair {
-  /** @inheritdoc */
-  getKeys(): DefaultKeys {
-    throw new Error('Method not implemented.');
-  }
+export class TaoKeyPair extends KeyPair {
+  TYPE = 'ed25519';
+  keyring = new Keyring({ type: TYPE });
 
-  /** @inheritdoc */
-  recordKeysFromPrivateKeyInProtocolFormat(prv: string): DefaultKeys {
-    throw new Error('Method not implemented.');
+  /**
+   * Helper function to create the KeyringPair for signing a dot transaction.
+   *
+   * @returns {KeyringPair} dot KeyringPair
+   *
+   * @see https://polkadot.js.org/docs/api/start/keyring
+   */
+  protected createPolkadotPair(): KeyringPair {
+    const secretKey = this.keyPair.prv ? new Uint8Array(Buffer.from(this.keyPair.prv, 'hex')) : undefined;
+    const publicKey = new Uint8Array(Buffer.from(this.keyPair.pub, 'hex'));
+    return createPair({ toSS58: keyring.encodeAddress, type: TYPE }, { secretKey, publicKey });
   }
 
-  /** @inheritdoc */
-  recordKeysFromPublicKeyInProtocolFormat(pub: string): DefaultKeys {
-    throw new Error('Method not implemented.');
-  }
+  /**
+   // https://wiki.polkadot.network/docs/learn-accounts#address-format
+   * Returns the address in either mainnet polkadot format (starts with 1)
+   * or substrate format used for westend (starts with 5)
+   */
+  getAddress(format: DotAddressFormat): string {
+    let encodedAddress = this.createPolkadotPair().address;
+    encodedAddress = keyring.encodeAddress(encodedAddress, format as number);
 
-  /** @inheritdoc */
-  getAddress(): string {
-    throw new Error('Method not implemented.');
+    return encodedAddress;
   }
 }

modules/sdk-coin-tao/src/tao.ts

@@ -7,7 +7,10 @@ import {
   VerifyTransactionOptions,
 } from '@bitgo/sdk-core';
 import { BaseCoin as StaticsBaseCoin } from '@bitgo/statics';
-import { SubstrateCoin } from '@bitgo/abstract-substrate';
+import { SubstrateCoin, Utils } from '@bitgo/abstract-substrate';
+import { TaoKeyPair } from './lib';
+
+const utils = Utils.default;
 
 export class Tao extends SubstrateCoin {
   protected readonly _staticsCoin: Readonly<StaticsBaseCoin>;
@@ -42,4 +45,16 @@ export class Tao extends SubstrateCoin {
   parseTransaction(params: ParseTransactionOptions): Promise<ParsedTransaction> {
     return {};
   }
+
+  generateKeyPair(seed?: Buffer): TaoKeyPair {
+    const keyPair = seed ? utils.keyPairFromSeed(new Uint8Array(seed)) : new TaoKeyPair();
+    const keys = keyPair.getKeys();
+    if (!keys.prv) {
+      throw new Error('Missing prv in key generation.');
+    }
+    return {
+      pub: keys.pub,
+      prv: keys.prv,
+    };
+  }
 }