fix signKavaTx and add kava example

examples/kava.ts

@@ -0,0 +1,48 @@
+import { kavaToUkava, Kiln } from "../src/kiln";
+import fs from "node:fs";
+import 'dotenv/config'
+import type { FireblocksIntegration } from "../src/fireblocks.ts";
+
+
+const apiSecret = fs.readFileSync(`${__dirname}/fireblocks_secret_prod.key`, 'utf8');
+
+const k = new Kiln({
+  baseUrl: process.env.KILN_API_URL as string,
+  apiToken: process.env.KILN_API_KEY as string,
+});
+
+const vault: FireblocksIntegration = {
+  provider: 'fireblocks',
+  fireblocksApiKey: process.env.FIREBLOCKS_API_KEY as string,
+  fireblocksSecretKey: apiSecret,
+  vaultId: 37
+};
+
+try {
+  console.log('crafting...');
+  const tx = await k.client.POST(
+    '/v1/kava/transaction/stake',
+    {
+      body: {
+        account_id: process.env.KILN_ACCOUNT_ID as string,
+        pubkey: '0233335b6c68a85e01b85055d0e8c2fcef42fed977898422ef3a5f6baf9a9a413e',
+        validator: 'kavavaloper1djqecw6nn5tydxq0shan7srv8j65clsf79myt8',
+        amount_ukava: kavaToUkava('0.01').toString(),
+      }
+    }
+  );
+  console.log('signing...');
+  if(!tx.data?.data) throw new Error('No data in response');
+  const signResponse = await k.fireblocks.signKavaTx(vault, tx.data.data);
+  console.log('broadcasting...');
+  if(!signResponse.signed_tx?.data?.signed_tx_serialized) throw new Error('No signed_tx in response');
+  const broadcastedTx = await k.client.POST("/v1/kava/transaction/broadcast", {
+    body: {
+      tx_serialized: signResponse.signed_tx.data.signed_tx_serialized,
+    }
+  });
+  console.log(broadcastedTx);
+
+} catch (err) {
+  console.log(err);
+}

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@kilnfi/sdk",
-  "version": "3.1.15",
+  "version": "3.1.16",
   "autor": "Kiln <support@kiln.fi> (https://kiln.fi)",
   "license": "BUSL-1.1",
   "description": "JavaScript sdk for Kiln API",

src/fireblocks.ts

@@ -414,18 +414,20 @@ export class FireblocksService {
         messages: [
           {
             content: tx.unsigned_tx_hash,
+            derivationPath: [44, 459, integration.vaultId, 0, 0],
             preHash: {
               content: tx.unsigned_tx_serialized,
               hashAlgorithm: 'SHA256',
             },
           },
         ],
+        algorithm: SigningAlgorithm.MPC_ECDSA_SECP256K1,
       },
     };
 
     const fbSigner = this.getSigner(integration);
     const fbNote = note ? note : 'KAVA tx from @kilnfi/sdk';
-    const fbTx = await fbSigner.sign(payload, 'KAVA_KAVA', fbNote);
+    const fbTx = await fbSigner.sign(payload, undefined, fbNote);
     const signature = fbTx.signedMessages?.[0]?.signature.fullSig;
 
     if (!signature) {

src/utils.ts

@@ -63,6 +63,13 @@ export const tonToNanoton = (ton: string): bigint => {
   return parseUnits(ton, 9);
 };
 
+/**
+ * Convert KAVA to uKAVA
+ */
+export const kavaToUkava = (kava: string): bigint => {
+  return parseUnits(kava, 6);
+};
+
 /**
  * Convert uZETA to ZETA
  */