adds Solana signer

packages/solana/package.json

@@ -34,6 +34,7 @@
     "bs58": "5.0.0",
     "ed25519-hd-key": "1.3.0",
     "eslint-config-custom": "*",
+    "gridplus-sdk": "^2.6.0",
     "lodash": "4.17.21",
     "reflect-metadata": "0.1.13",
     "rimraf": "4.4.0",

packages/solana/src/signers/lattice.signer.spec.ts

@@ -0,0 +1,92 @@
+import { Msg } from '@xdefi-tech/chains-core';
+import { Transaction, PublicKey } from '@solana/web3.js';
+import fetch from 'cross-fetch';
+
+import { SolanaProvider } from '../chain.provider';
+import { IndexerDataSource } from '../datasource';
+import { SOLANA_MANIFEST } from '../manifests';
+import { ChainMsg, MsgBody } from '../msg';
+
+import LatticeSigner from './lattice.signer';
+
+globalThis.fetch = fetch;
+
+/**
+ * Update this config to match your Lattice device
+ *
+ * TODO: Update this to use environment variables
+ */
+const CONFIG = {
+  deviceId: '',
+  password: '',
+  name: '',
+};
+
+jest.mock('@solana/web3.js', () => {
+  const original = jest.requireActual('@solana/web3.js');
+  return {
+    ...original,
+    Transaction: {
+      ...original.Transaction,
+      prototype: {
+        ...original.Transaction.prototype,
+        serialize: jest
+          .fn()
+          .mockReturnValue(Buffer.from('serialized_transaction')),
+      },
+    },
+  };
+});
+
+describe('lattice.signer', () => {
+  let signer: LatticeSigner;
+  let derivationPath: string;
+  let provider: SolanaProvider;
+  let txInput: MsgBody;
+  let message: Msg;
+
+  beforeAll(async () => {
+    //@ts-ignore
+    signer = await LatticeSigner.create(CONFIG);
+    if (!signer.isPaired) {
+      throw new Error('Failed to pair with Lattice device');
+    }
+  });
+
+  beforeEach(async () => {
+    provider = new SolanaProvider(new IndexerDataSource(SOLANA_MANIFEST));
+    derivationPath = "m/44'/501'/0'/0/0";
+
+    txInput = {
+      from: '7HZYYfdqQgDgNduLA5gh8y4A5Mr3rCLVWeXBF4Vg9qZZ',
+      to: 'GrDMoeqMLFjeXQ24H56S1RLgT4R76jsuWCd6SvXyGPQ5',
+      amount: 0.000001,
+      gasPrice: 5000,
+      priorityFeeAmount: 10000,
+    };
+
+    message = provider.createMsg(txInput);
+  });
+
+  it('should get an address from the lattice device', async () => {
+    const address = await signer.getAddress(derivationPath);
+    expect(address).toBe(txInput.from);
+  }, 100000);
+
+  it('should sign a transaction using a lattice device', async () => {
+    await signer.sign(message as ChainMsg, derivationPath);
+    expect(message.signedTransaction).toBeTruthy();
+  }, 100000);
+
+  it('should return false when verifying an invalid address', async () => {
+    expect(signer.verifyAddress('invalid_address')).toBe(false);
+  });
+
+  it('should validate a correct address', async () => {
+    expect(signer.verifyAddress(txInput.from)).toBe(true);
+  });
+
+  it('should fail if private key is requested', async () => {
+    await expect(signer.getPrivateKey(derivationPath)).rejects.toThrow();
+  });
+});

packages/solana/src/signers/lattice.signer.ts

@@ -0,0 +1,69 @@
+import { PublicKey, Transaction as SolanaTransaction } from '@solana/web3.js';
+import { Signer, SignerDecorator } from '@xdefi-tech/chains-core';
+import { fetchAddresses, signSolanaTx } from 'gridplus-sdk';
+
+import { ChainMsg } from '../msg';
+
+interface SolanaTransactionData {
+  transaction: Buffer;
+  signerPath: number[];
+}
+
+@SignerDecorator(Signer.SignerType.LATTICE)
+export class LatticeSigner extends Signer.LatticeProvider {
+  verifyAddress(address: string): boolean {
+    try {
+      const publicKey = new PublicKey(address);
+      return publicKey.toBase58() === address;
+    } catch (error) {
+      return false;
+    }
+  }
+
+  async getPrivateKey(_derivation: string) {
+    throw new Error('Cannot extract private key from Lattice device');
+  }
+
+  async getAddress(derivation: string): Promise<string> {
+    const addresses = await fetchAddresses({
+      startPath:
+        Signer.LatticeProvider.convertDerivationPathToArray(derivation),
+      n: 1,
+      flag: 0x04,
+    });
+    return addresses[0];
+  }
+
+  async sign(msg: ChainMsg, derivation: string): Promise<void> {
+    const tx = await msg.buildTx();
+    const payload = this.convertToSolanaTransactionData(tx as any, derivation);
+    const signedTx = await this.signSolanaTransaction(payload);
+    msg.sign(signedTx.serialize());
+  }
+
+  private convertToSolanaTransactionData(
+    transaction: SolanaTransaction,
+    derivation: string
+  ): SolanaTransactionData {
+    const signerPath =
+      Signer.LatticeProvider.convertDerivationPathToArray(derivation);
+    return {
+      transaction: Buffer.from(transaction.serializeMessage()),
+      signerPath,
+    };
+  }
+
+  private async signSolanaTransaction(
+    payload: SolanaTransactionData
+  ): Promise<SolanaTransaction> {
+    const { transaction, signerPath } = payload;
+
+    const signedTx = await signSolanaTx(transaction, {
+      signerPath,
+    });
+
+    return signedTx;
+  }
+}
+
+export default LatticeSigner;