feat(sdk-coin-flr): add transaction builder

modules/sdk-coin-flr/.eslintignore

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+node_modules
+.idea
+public
+dist
+

modules/sdk-coin-flr/.gitignore

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+node_modules/
+.idea/
+dist/

modules/sdk-coin-flr/.mocharc.yml

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+require: 'ts-node/register'
+timeout: '120000'
+reporter: 'min'
+reporter-option:
+  - 'cdn=true'
+  - 'json=false'
+exit: true
+spec: ['test/unit/**/*.ts']

modules/sdk-coin-flr/.npmignore

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+!dist/
+dist/test/
+dist/tsconfig.tsbuildinfo
+.idea/
+.prettierrc.yml
+tsconfig.json
+src/
+test/
+scripts/
+.nyc_output
+CODEOWNERS
+node_modules/
+.prettierignore
+.mocharc.js

modules/sdk-coin-flr/.prettierignore

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+.nyc_output/
+dist/

modules/sdk-coin-flr/.prettierrc.yml

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+printWidth: 120
+singleQuote: true
+trailingComma: 'es5'

modules/sdk-coin-flr/CHANGELOG.md

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+# Change Log
+
+All notable changes to this project will be documented in this file.
+See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
+
+**Note:** Version bump only for package @bitgo/sdk-coin-flr
+
+### Features

modules/sdk-coin-flr/README.md

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+# BitGo sdk-coin-flr
+
+SDK coins provide a modular approach to a monolithic architecture. This and all BitGoJS SDK coins allow developers to use only the coins needed for a given project.
+
+## Installation
+
+All coins are loaded traditionally through the `bitgo` package. If you are using coins individually, you will be accessing the coin via the `@bitgo/sdk-api` package.
+
+In your project install both `@bitgo/sdk-api` and `@bitgo/sdk-coin-flr`.
+
+```shell
+npm i @bitgo/sdk-api @bitgo/sdk-coin-flr
+```
+
+Next, you will be able to initialize an instance of "bitgo" through `@bitgo/sdk-api` instead of `bitgo`.
+
+```javascript
+import { BitGoAPI } from '@bitgo/sdk-api';
+import { flr } from '@bitgo/sdk-coin-flr';
+
+const sdk = new BitGoAPI();
+
+sdk.register('flr', flr.createInstance);
+```
+
+## Development
+
+Most of the coin implementations are derived from `@bitgo/sdk-core`, `@bitgo/statics`, and coin specific packages. These implementations are used to interact with the BitGo API and BitGo platform services.
+
+You will notice that the basic version of common class extensions have been provided to you and must be resolved before the package build will succeed. Upon initiation of a given SDK coin, you will need to verify that your coin has been included in the root `tsconfig.packages.json` and that the linting, formatting, and testing succeeds when run both within the coin and from the root of BitGoJS.

modules/sdk-coin-flr/package.json

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+{
+  "name": "@bitgo/sdk-coin-flr",
+  "version": "1.0.0",
+  "description": "BitGo SDK coin library for Flr",
+  "main": "./dist/src/index.js",
+  "types": "./dist/src/index.d.ts",
+  "scripts": {
+    "build": "yarn tsc --build --incremental --verbose .",
+    "fmt": "prettier --write .",
+    "check-fmt": "prettier --check .",
+    "clean": "rm -r ./dist",
+    "lint": "eslint --quiet .",
+    "prepare": "npm run build",
+    "test": "npm run coverage",
+    "coverage": "nyc -- npm run unit-test",
+    "unit-test": "mocha"
+  },
+  "author": "BitGo SDK Team <[email protected]>",
+  "license": "MIT",
+  "engines": {
+    "node": ">=18 <21"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/BitGo/BitGoJS.git",
+    "directory": "modules/sdk-coin-flr"
+  },
+  "lint-staged": {
+    "*.{js,ts}": [
+      "yarn prettier --write",
+      "yarn eslint --fix"
+    ]
+  },
+  "publishConfig": {
+    "access": "public"
+  },
+  "nyc": {
+    "extension": [
+      ".ts"
+    ]
+  },
+  "dependencies": {
+    "@bitgo/abstract-eth": "^22.4.10",
+    "@bitgo/sdk-core": "^28.20.0",
+    "@bitgo/statics": "^50.20.0",
+    "@ethereumjs/common": "^2.6.5"
+  },
+  "devDependencies": {
+    "@bitgo/sdk-api": "^1.58.2",
+    "@bitgo/sdk-test": "^8.0.65"
+  }
+}

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

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+/***
+ * @developerReferences
+ * - Developer Hub: https://dev.flare.network/
+ * - Doc: https://docs.flare.network/user/wallets/
+ *
+ * @coinFullName Flare
+ * @coinWebsite https://flare-explorer.flare.network
+ */
+
+import { BaseCoin, BitGoBase, common, MPCAlgorithm } from '@bitgo/sdk-core';
+import { BaseCoin as StaticsBaseCoin, coins } from '@bitgo/statics';
+import { AbstractEthLikeNewCoins, recoveryBlockchainExplorerQuery } from '@bitgo/abstract-eth';
+import { TransactionBuilder } from './lib';
+
+export class Flr extends AbstractEthLikeNewCoins {
+  protected constructor(bitgo: BitGoBase, staticsCoin?: Readonly<StaticsBaseCoin>) {
+    super(bitgo, staticsCoin);
+  }
+
+  static createInstance(bitgo: BitGoBase, staticsCoin?: Readonly<StaticsBaseCoin>): BaseCoin {
+    return new Flr(bitgo, staticsCoin);
+  }
+
+  protected getTransactionBuilder(): TransactionBuilder {
+    return new TransactionBuilder(coins.get(this.getBaseChain()));
+  }
+
+  /** @inheritDoc */
+  supportsTss(): boolean {
+    return true;
+  }
+
+  /** @inheritDoc */
+  getMPCAlgorithm(): MPCAlgorithm {
+    return 'ecdsa';
+  }
+
+  async recoveryBlockchainExplorerQuery(query: Record<string, string>): Promise<Record<string, unknown>> {
+    const apiToken = common.Environments[this.bitgo.getEnv()].flrExplorerApiToken;
+    const explorerUrl = common.Environments[this.bitgo.getEnv()].flrExplorerBaseUrl;
+    return await recoveryBlockchainExplorerQuery(query, explorerUrl as string, apiToken);
+  }
+}

modules/sdk-coin-flr/src/index.ts

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+export * from './lib';
+export * from './flr';
+export * from './tflr';
+export * from './register';

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

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+import * as Utils from './utils';
+
+export { TransactionBuilder } from './transactionBuilder';
+export { TransferBuilder } from './transferBuilder';
+export { Transaction, KeyPair } from '@bitgo/abstract-eth';
+export { Utils };

modules/sdk-coin-flr/src/lib/resources.ts

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+import EthereumCommon from '@ethereumjs/common';
+import { coins, EthereumNetwork } from '@bitgo/statics';
+
+export const testnetCommon = EthereumCommon.custom(
+  {
+    name: 'flr testnet',
+    networkId: (coins.get('tflr').network as EthereumNetwork).chainId,
+    chainId: (coins.get('tflr').network as EthereumNetwork).chainId,
+  },
+  {
+    baseChain: 'sepolia',
+    hardfork: 'london',
+    eips: [1559],
+  }
+);
+
+export const mainnetCommon = EthereumCommon.custom(
+  {
+    name: 'flr mainnet',
+    networkId: (coins.get('flr').network as EthereumNetwork).chainId,
+    chainId: (coins.get('flr').network as EthereumNetwork).chainId,
+  },
+  {
+    baseChain: 'mainnet',
+    hardfork: 'london',
+    eips: [1559],
+  }
+);

modules/sdk-coin-flr/src/lib/transactionBuilder.ts

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+import { BaseCoin as CoinConfig } from '@bitgo/statics';
+import { BuildTransactionError, TransactionType } from '@bitgo/sdk-core';
+import { TransactionBuilder as AbstractTransactionBuilder, Transaction } from '@bitgo/abstract-eth';
+import { getCommon } from './utils';
+import { TransferBuilder } from './transferBuilder';
+
+export class TransactionBuilder extends AbstractTransactionBuilder {
+  protected _transfer: TransferBuilder;
+
+  constructor(_coinConfig: Readonly<CoinConfig>) {
+    super(_coinConfig);
+    this._common = getCommon(this._coinConfig.network.type);
+    this.transaction = new Transaction(this._coinConfig, this._common);
+  }
+
+  /** @inheritdoc */
+  transfer(data?: string): TransferBuilder {
+    if (this._type !== TransactionType.Send) {
+      throw new BuildTransactionError('Transfers can only be set for send transactions');
+    }
+    if (!this._transfer) {
+      this._transfer = new TransferBuilder(data);
+    }
+    return this._transfer;
+  }
+
+  protected getContractData(addresses: string[]): string {
+    throw new Error('Method not implemented.');
+  }
+}

modules/sdk-coin-flr/src/lib/transferBuilder.ts

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+export { TransferBuilder } from '@bitgo/abstract-eth';

modules/sdk-coin-flr/src/lib/utils.ts

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+import { NetworkType } from '@bitgo/statics';
+import EthereumCommon from '@ethereumjs/common';
+import { InvalidTransactionError } from '@bitgo/sdk-core';
+import { testnetCommon, mainnetCommon } from './resources';
+
+const commons: Map<NetworkType, EthereumCommon> = new Map<NetworkType, EthereumCommon>([
+  [NetworkType.MAINNET, mainnetCommon],
+  [NetworkType.TESTNET, testnetCommon],
+]);
+
+/**
+ * @param {NetworkType} network either mainnet or testnet
+ * @returns {EthereumCommon} Ethereum common configuration object
+ */
+export function getCommon(network: NetworkType): EthereumCommon {
+  const common = commons.get(network);
+  if (!common) {
+    throw new InvalidTransactionError('Missing network common configuration');
+  }
+  return common;
+}

modules/sdk-coin-flr/src/register.ts

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+import { BitGoBase } from '@bitgo/sdk-core';
+import { Flr } from './flr';
+import { Tflr } from './tflr';
+
+export const register = (sdk: BitGoBase): void => {
+  sdk.register('flr', Flr.createInstance);
+  sdk.register('tflr', Tflr.createInstance);
+};

modules/sdk-coin-flr/src/tflr.ts

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+/**
+ * Testnet Flr
+ *
+ * @format
+ */
+import { BaseCoin, BitGoBase } from '@bitgo/sdk-core';
+import { BaseCoin as StaticsBaseCoin } from '@bitgo/statics';
+import { Flr } from './flr';
+
+export class Tflr extends Flr {
+  protected constructor(bitgo: BitGoBase, staticsCoin?: Readonly<StaticsBaseCoin>) {
+    super(bitgo, staticsCoin);
+  }
+
+  static createInstance(bitgo: BitGoBase, staticsCoin?: Readonly<StaticsBaseCoin>): BaseCoin {
+    return new Tflr(bitgo, staticsCoin);
+  }
+}

modules/sdk-coin-flr/test/unit/flr.ts

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+import 'should';
+
+import { TestBitGo, TestBitGoAPI } from '@bitgo/sdk-test';
+import { BitGoAPI } from '@bitgo/sdk-api';
+
+import { Flr, Tflr } from '../../src/index';
+
+const bitgo: TestBitGoAPI = TestBitGo.decorate(BitGoAPI, { env: 'test' });
+
+describe('flr', function () {
+  before(function () {
+    bitgo.safeRegister('flr', Flr.createInstance);
+    bitgo.safeRegister('tflr', Tflr.createInstance);
+    bitgo.initializeTestVars();
+  });
+
+  describe('Basic Coin Info', function () {
+    it('should return the right info for flr', function () {
+      const flr = bitgo.coin('flr');
+
+      flr.should.be.an.instanceof(Flr);
+      flr.getChain().should.equal('flr');
+      flr.getFamily().should.equal('flr');
+      flr.getFullName().should.equal('flare');
+      flr.getBaseFactor().should.equal(1e18);
+      flr.supportsTss().should.equal(true);
+      flr.allowsAccountConsolidations().should.equal(false);
+    });
+
+    it('should return the right info for tflr', function () {
+      const tflr = bitgo.coin('tflr');
+
+      tflr.should.be.an.instanceof(Tflr);
+      tflr.getChain().should.equal('tflr');
+      tflr.getFamily().should.equal('flr');
+      tflr.getFullName().should.equal('Testnet flare chain');
+      tflr.getBaseFactor().should.equal(1e18);
+      tflr.supportsTss().should.equal(true);
+      tflr.allowsAccountConsolidations().should.equal(false);
+    });
+  });
+});

modules/sdk-coin-flr/test/unit/getBuilder.ts

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+import { TransactionBuilder } from '../../src';
+import { coins } from '@bitgo/statics';
+
+export const getBuilder = (coin: string): TransactionBuilder => {
+  return new TransactionBuilder(coins.get(coin));
+};

modules/sdk-coin-flr/test/unit/transactionBuilder/send.ts

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+import { getBuilder } from '../getBuilder';
+import should from 'should';
+
+describe('Flr Transfer Builder', () => {
+  describe('Build from TxHex', function () {
+    it('Should successfully build from txHex', async function () {
+      const txBuilder = getBuilder('tflr');
+      const txHex =
+        '0xf86e038505d21dba00825208944943dd2a2494e3ea5937954cb836692a047695b5880de0b6b3a764000080820108a07fdc8942a7230a91022492180290b10ab9f50c14836966e7e0b6a25ce8c3fedea06d3ce650b2bd7117a5315b10c6054f5f1960fbeda4399d6a34b2f6ca6c68fd8e';
+      txBuilder.from(txHex);
+      const parsedTx = await txBuilder.build();
+
+      should.exist(parsedTx.toJson());
+    });
+  });
+});

modules/sdk-coin-flr/test/unit/utils.ts

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+import assert from 'assert';
+import should from 'should';
+import { NetworkType } from '@bitgo/statics';
+import { getCommon } from '../../src/lib/utils';
+
+describe('Network Common Configuration', () => {
+  it('getCommon for mainnet', () => {
+    const common = getCommon(NetworkType.MAINNET);
+    should.equal(common.chainName(), 'flr mainnet');
+    should.equal(common.hardfork(), 'london');
+    should.equal(common.chainIdBN().toString(), '14');
+    should.equal(common.networkIdBN().toString(), '14');
+  });
+
+  it('getCommon for testnet', () => {
+    const common = getCommon(NetworkType.TESTNET);
+    should.equal(common.chainName(), 'flr testnet');
+    should.equal(common.hardfork(), 'london');
+    should.equal(common.chainIdBN().toString(), '114');
+    should.equal(common.networkIdBN().toString(), '114');
+  });
+
+  it('getCommon for invalid network', () => {
+    assert.throws(
+      () => getCommon('invalidNetwork' as NetworkType),
+      (e: any) => e.message === 'Missing network common configuration'
+    );
+  });
+});