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Added blind commands to mywallet #7

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Merged
SynthLuvr merged 1 commit into from
Jul 20, 2025
Merged

Added blind commands to mywallet #7

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1 change: 1 addition & 0 deletions package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,7 @@
"commander": "^14.0.0",
"conf": "^14.0.0",
"decimal.js": "^10.6.0",
"eciesjs": "^0.4.15",
"inquirer": "^12.7.0",
"js-sha3": "^0.9.3",
"ky": "^1.8.1",
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39 changes: 39 additions & 0 deletions pnpm-lock.yaml
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68 changes: 68 additions & 0 deletions src/commands/blind.ts
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@@ -0,0 +1,68 @@
import { password } from "@inquirer/prompts";
import { type } from "arktype";
import { decrypt, ECIES_CONFIG, encrypt, PrivateKey } from "eciesjs";
import { mayFail } from "ts-handling";
import { decode } from "../encoding.js";
import { exit, program } from "./cli.js";

ECIES_CONFIG.ellipticCurve = "x25519";

const isHex = (value: string) =>
value.length % 2 === 0 && /^[0-9a-f]+$/.test(value);

const Data = type("string > 0").pipe(
(v) => new Uint8Array(Buffer.from(v, isHex(v) ? "hex" : "utf8")),
);
const Key = type(/^[a-f0-9]{64}$/).pipe((v) => Buffer.from(v, "hex"));

const Hex = type(/^[a-f0-9]+$/)
.narrow((v, ctx) => v.length % 2 === 0 || ctx.mustBe("even length"))
.pipe((v) => Buffer.from(v, "hex"));

const blind = program.command("blind").description("Blind and unblind data");

blind
.command("key")
.description("Creates a new blind key pair")
.action(() => {
const sk = new PrivateKey(undefined, "x25519");
console.log("Public:", sk.publicKey.toHex());
console.log("Private:", sk.toHex());
});

blind
.command("encode")
.description("Blinds data")
.argument("data", "The data to blind")
.argument("blinding", "The x25519 public key to use to blind the data")
.action(($data: string, $blinding: string) => {
const data = Data($data);
if (data instanceof type.errors) return exit(`data ${data.summary}`);

const blinding = Key($blinding);
if (blinding instanceof type.errors)
return exit(`blinding ${blinding.summary}`);

console.log(encrypt(blinding, data).toString("hex"));
});

blind
.command("decode")
.description("Unblinds data")
.argument("encoded", "The encoded data to unblind")
.action(async ($encoded: string) => {
const encoded = Hex($encoded);
if (encoded instanceof type.errors)
return exit(`encoded ${encoded.summary}`);

const $privateKey = await password({ message: "Enter your private key" });
if (!$privateKey) return exit("No private key provided");
const privateKey = Key($privateKey);
if (privateKey instanceof type.errors)
return exit(`private key ${privateKey.summary}`);

const decrypted = mayFail(() => decrypt(privateKey, encoded));
if (!decrypted.ok) return exit("wrong private key");

console.log(decode(decrypted.data));
});
1 change: 1 addition & 0 deletions src/commands/index.ts
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@@ -1,4 +1,5 @@
import { program } from "./cli.js";
import "./blind.js";
import "./config.js";
import "./payload.js";
import "./wallet.js";
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49 changes: 49 additions & 0 deletions src/encoding.ts
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import { TextDecoder } from "util";

type Encoding = "hex" | "utf8";

const looksLikeHex = (data: Buffer) => {
if (data.length === 0 || data.length % 2 !== 0) return false;

for (const b of data)
if (
!(
(b >= 0x30 && b <= 0x39) || // '0'–'9'
(b >= 0x41 && b <= 0x46) || // 'A'–'F'
(b >= 0x61 && b <= 0x66) // 'a'–'f'
)
)
return false;

return true;
};

const isValidUtf8 = (data: Buffer) => {
let decoded: string;

try {
decoded = new TextDecoder("utf-8", { fatal: true }).decode(data);
} catch {
return false;
}

// eslint-disable-next-line no-control-regex
return !/[\u0000-\u0008\u000B\u000C\u000E-\u001F\u007F]/.test(decoded);
};

const detectEncoding = (data: Buffer): Encoding => {
if (looksLikeHex(data)) {
try {
const decoded = Buffer.from(data.toString("ascii"), "hex");
if (isValidUtf8(decoded)) return "hex";
} catch {}
}

if (isValidUtf8(data)) return "utf8";

return "hex";
};

const decode = (data: Buffer): string => data.toString(detectEncoding(data));

export { decode };