ValCoin Cryptocurrency

Create Wallet

\n \n {key &&

Your wallet key: {key}

}\n

Transfer ValCoin

\n {message &&

{message}

}\n \n

\n );\n}\n\nfunction client() {\n createRoot(document.getElementById(\"root\")).render();\n}\nif (typeof document !== \"undefined\") { client(); }\n\nexport default async function server(request: Request): Promise {\n \n\n const SCHEMA_VERSION = 1;\n const KEY = \"valCoinApi\";\n\n await sqlite.execute(`\n CREATE TABLE IF NOT EXISTS ${KEY}_valcoin_${SCHEMA_VERSION} (\n hash TEXT PRIMARY KEY,\n value INTEGER NOT NULL DEFAULT 0\n )\n `);\n\n const hash = (key: string) => createHash('sha256').update(key).digest('hex');\n\n if (request.method === \"POST\" && new URL(request.url).pathname === \"/create-wallet\") {\n const key = uuidv4();\n const walletHash = hash(key);\n await sqlite.execute(`INSERT INTO ${KEY}_valcoin_${SCHEMA_VERSION} (hash, value) VALUES (?, ?)`, [walletHash, 100]);\n return new Response(JSON.stringify({ key }), { headers: { \"Content-Type\": \"application/json\" } });\n }\n\n if (request.method === \"POST\" && new URL(request.url).pathname === \"/transfer\") {\n const { sourceKey, destinationHash, amount } = await request.json();\n const sourceHash = hash(sourceKey);\n\n const sourceWallet = (await sqlite.execute(`SELECT * FROM ${KEY}_valcoin_${SCHEMA_VERSION} WHERE hash = ?`, [sourceHash])).rows[0];\n const destWallet = (await sqlite.execute(`SELECT * FROM ${KEY}_valcoin_${SCHEMA_VERSION} WHERE hash = ?`, [destinationHash])).rows[0];\n\n if (!sourceWallet || !destWallet) {\n return new Response(JSON.stringify({ message: \"Invalid source key or destination hash\" }), { headers: { \"Content-Type\": \"application/json\" } });\n }\n\n if (sourceWallet.value < amount) {\n return new Response(JSON.stringify({ message: \"Insufficient funds\" }), { headers: { \"Content-Type\": \"application/json\" } });\n }\n\n await sqlite.execute(`\n UPDATE ${KEY}_valcoin_${SCHEMA_VERSION}\n SET value = CASE\n WHEN hash = ? THEN value - ?\n WHEN hash = ? THEN value + ?\n END\n WHERE hash IN (?, ?)\n `, [sourceHash, amount, destinationHash, amount, sourceHash, destinationHash]);\n\n return new Response(JSON.stringify({ message: \"Transfer successful\" }), { headers: { \"Content-Type\": \"application/json\" } });\n }\n\n return new Response(`\n \n \n ValCoin Cryptocurrency\n \n \n \n

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aggy

valCoinApi