Feat: add initial SVM signer utils

package.json

@@ -15,6 +15,7 @@
     "@across-protocol/sdk": "4.2.5",
     "@arbitrum/sdk": "^4.0.2",
     "@consensys/linea-sdk": "^0.2.1",
+    "@coral-xyz/borsh": "^0.30.1",
     "@defi-wonderland/smock": "^2.3.5",
     "@eth-optimism/sdk": "^3.3.2",
     "@ethersproject/abi": "^5.7.0",
@@ -26,6 +27,7 @@
     "@maticnetwork/maticjs": "^3.6.0",
     "@maticnetwork/maticjs-ethers": "^1.0.3",
     "@openzeppelin/hardhat-upgrades": "^1.28.0",
+    "@solana/web3.js": "2.0.0",
     "@uma/common": "2.33.0",
     "@uma/logger": "^1.3.0",
     "axios": "^1.7.4",

src/utils/SvmSignerUtils.ts

@@ -0,0 +1,28 @@
+import {
+  createKeyPairSignerFromPrivateKeyBytes,
+  KeyPairSigner,
+  createKeyPairFromBytes,
+  createSignerFromKeyPair,
+  Wallet,
+} from "./";
+import fs from "fs";
+
+export async function getSvmSignerFromEvmSigner(evmSigner: Wallet): Promise<KeyPairSigner> {
+  // Extract the private key from the evm signer and use it to create a svm signer.
+  const evmPrivateKey = evmSigner._signingKey().privateKey;
+  return await getSvmSignerFromPrivateKey(evmPrivateKey);
+}
+
+export async function getSvmSignerFromFile(filePath: string): Promise<KeyPairSigner> {
+  const keypairFile = fs.readFileSync(filePath);
+  const keypairBytes = new Uint8Array(JSON.parse(keypairFile.toString()));
+
+  // Create a KeyPairSigner from the bytes.
+  const keys = await createKeyPairFromBytes(keypairBytes);
+  return await createSignerFromKeyPair(keys);
+}
+
+export async function getSvmSignerFromPrivateKey(privateKey: string): Promise<KeyPairSigner> {
+  const privateKeyAsBytes = Uint8Array.from(Buffer.from(privateKey.slice(2), "hex"));
+  return await createKeyPairSignerFromPrivateKeyBytes(privateKeyAsBytes);
+}

src/utils/index.ts

@@ -35,6 +35,13 @@ export {
   TOKEN_EQUIVALENCE_REMAPPING,
 } from "@across-protocol/constants";
 
+export {
+  createKeyPairSignerFromPrivateKeyBytes,
+  KeyPairSigner,
+  createSignerFromKeyPair,
+  createKeyPairFromBytes,
+} from "@solana/web3.js";
+
 // TypeChain exports used in the bot.
 export {
   getContractInfoFromAddress,