From 68e7fe9655f94efc573f3aab7acf60d03c4162a0 Mon Sep 17 00:00:00 2001
From: Adam Soltys <adam@coinos.io>
Date: Wed, 26 Nov 2025 14:53:20 -0800
Subject: ark balance

---
 src/lib/ark.ts | 116 ++++++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 106 insertions(+), 10 deletions(-)

(limited to 'src/lib')

diff --git a/src/lib/ark.ts b/src/lib/ark.ts
index 2dec57d9..7649a6bf 100644
--- a/src/lib/ark.ts
+++ b/src/lib/ark.ts
@@ -1,20 +1,116 @@
 import { persistLocal } from "$lib/store";
+import { get } from "svelte/store";
 import { SingleKey, Wallet } from "@arkade-os/sdk";
+import { bytesToHex, randomBytes } from "@noble/hashes/utils";
+import { nip19 } from "nostr-tools";
+import { hex } from "@scure/base";
 
-const prefix = "ark";
-export const mnemonic = persistLocal(`${prefix}mnemonic`, "");
-export const password = persistLocal(`${prefix}password`, "");
-export const arkkey = persistLocal(`${prefix}key`, "");
+export const arkServerUrl = "http://localhost:7070";
+export const arkkey = persistLocal("arkkey", "");
 
-export const getWallet = async () => {
-	// const identity = SingleKey.fromHex(get(arkkey));
+export const generateKey = (): string => {
+	const privateKey = bytesToHex(randomBytes(32));
+	arkkey.set(privateKey);
+	return privateKey;
+};
 
-	const identity = SingleKey.fromHex(
-		"ce66c68f8875c0c98a502c666303dc183a21600130013c06f9d1edf60207abf2",
-	);
+export const getKey = (): string => {
+	let key = get(arkkey);
+	if (!key) {
+		key = generateKey();
+	}
+	return key;
+};
+
+export const hasKey = (): boolean => {
+	return !!get(arkkey);
+};
+
+export const clearKey = (): void => {
+	arkkey.set("");
+};
+
+export const keyToNsec = (key?: string): string => {
+	const k = key || getKey();
+	return nip19.nsecEncode(hex.decode(k));
+};
+
+export const nsecToKey = (nsec: string): string => {
+	const { type, data } = nip19.decode(nsec);
+	if (type !== "nsec") throw new Error("Invalid nsec format");
+	return bytesToHex(data);
+};
+
+export const restoreFromNsec = (nsec: string): string => {
+	const key = nsecToKey(nsec);
+	arkkey.set(key);
+	return key;
+};
+
+export const getWallet = async () => {
+	const key = getKey();
+	const identity = SingleKey.fromHex(key);
 
 	return Wallet.create({
 		identity,
-		arkServerUrl: "https://arkade.computer",
+		arkServerUrl,
 	});
 };
+
+export const getAddress = async (): Promise<string> => {
+	const wallet = await getWallet();
+	return wallet.getAddress();
+};
+
+export const getBalance = async (): Promise<{ available: number; pending: number }> => {
+	const wallet = await getWallet();
+	return wallet.getBalance();
+};
+
+export const syncArkAddress = async (
+	currentAddress: string | undefined,
+	updateFn: (arkAddress: string) => Promise<void>
+): Promise<string> => {
+	const address = await getAddress();
+	if (address !== currentAddress) {
+		await updateFn(address);
+	}
+	return address;
+};
+
+export const sendArk = async (address: string, amount: number): Promise<string> => {
+	const wallet = await getWallet();
+	const vtxos = await wallet.getVtxos();
+
+	// Sort by expiry (spend oldest first)
+	const sorted = vtxos.sort(
+		(a, b) => (a.virtualStatus.batchExpiry ?? 0) - (b.virtualStatus.batchExpiry ?? 0)
+	);
+
+	// Select inputs
+	const inputs = [];
+	let selectedAmount = 0;
+	for (const vtxo of sorted) {
+		if (selectedAmount >= amount) break;
+		inputs.push(vtxo);
+		selectedAmount += vtxo.value;
+	}
+
+	if (selectedAmount < amount) {
+		throw new Error(`Insufficient funds: have ${selectedAmount}, need ${amount}`);
+	}
+
+	// Build outputs
+	const outputs: { address: string; amount: bigint }[] = [
+		{ address, amount: BigInt(amount) }
+	];
+
+	// Add change output if needed
+	const change = selectedAmount - amount;
+	if (change > 0) {
+		const changeAddress = await wallet.getAddress();
+		outputs.push({ address: changeAddress, amount: BigInt(change) });
+	}
+
+	return wallet.settle({ inputs, outputs });
+};
-- 
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