mybucks.online

Think about how easy it is to slide a $10 bill into a paper envelope and hand it to a friend. No setup, no instructions, zero friction.

Now compare that to crypto.

Despite years of innovation, sending someone the equivalent of $10 can still mean asking for a wallet address, waiting for them to install an app, or explaining what a seed phrase is. For technology designed to move value instantly across the world, the first transaction is often the hardest.

The problem isn't blockchain. It's the user experience.

We've spent years improving scalability, interoperability, and transaction costs, yet one simple use case remains surprisingly awkward: giving someone money.

The internet already has familiar ways to package value. We have gift cards, prepaid cards, coupons, and cash envelopes. Each lets the sender prepare value first and hand it to someone later.

Crypto largely works the opposite way. Before you can send value, the recipient must already have a wallet.

What if we reversed that model?

To fuel internet culture—where memes, community giveaways, viral airdrops, and casual tipping move instantly—we need to send the envelope.

Send the Envelope, Not the Coins

A Digital Cash Envelope packages digital value into a temporary wallet that can be shared through a simple web link or QR code.

Instead of asking someone for an address, you prepare the envelope first.

The recipient opens the link, claims the wallet, and takes control of the funds.

The experience becomes much closer to handing someone cash than onboarding them into financial software.

• ✉️ Zero Friction: Drop the link in a DM on Telegram, WhatsApp, or X.

• 🖱️ Instant Access: The recipient clicks it, and the funds open instantly right in their mobile browser.

• 📱 No Barriers: No registration, no app downloads, and no seed phrase hurdles.

New Possibilities

This isn't meant to replace long-term storage; it acts exactly like physical cash.

Thinking in terms of digital cash envelopes creates opportunities that traditional wallet models don't optimize for:

• Viral Giveaways: Flash-drop QR codes during social media livestreams or X raids.

• Instant Airdrops: Reward active community members in chat groups simultaneously without collecting addresses.

• Frictionless Onboarding: Hand someone their very first crypto token as a beautiful, visual gift card without making them do technical "homework" first.

Not a Replacement for Wallets

A Digital Cash Envelope is not intended to replace long-term wallets.

Just as people don't store their savings in a paper envelope, disposable digital envelopes serve a different purpose: transferring value simply, socially, and with minimal friction.

Long-term wallets remain the place for managing assets. Digital cash envelopes focus on making the first transfer effortless.

It is time to bridge the gap between advanced blockchain tech and the simple, social joy of human generosity.

A fortress wallet (like MetaMask) is meant to be kept in a secure place for a long time—often years—and used to hold funds you care about over the long term. You guard one root secret (typically a seed phrase). You do not paste it into a chat or email.

In everyday life the opposite is also needed: a disposable envelope. Something is placed inside, handed off, and the envelope is discarded. For crypto, that means a one-time wallet: create it, fund it, transfer full ownership, and move on.

Security philosophy

For a disposable envelope, the purpose is literally one-time. It is not a vault for large amounts, and top-tier cold-storage security is not the main goal. Convenience comes first.

That leads to a deterministic design: the same credentials always produce the same private key. Converting passphrase and PIN into a key with a one-way process is the natural implementation.

Brain wallets already demonstrated the failure mode—weak passwords hashed once and guessed at scale. The choice of hash function and its parameters therefore matters.

Scrypt was chosen and tuned for a tradeoff between safety and hashing time on desktop and mobile browsers. Same credential → same wallet (same private key). Brute force is made expensive; a GPU farm should not be economical to crack a five-dollar gift wallet.

passphrase + PIN → zxcvbn checks → Scrypt → Keccak256 → private key → address

Everything runs in the browser. There is no server that stores or recovers your credentials.

Passphrase + PIN, auto-fill, and zxcvbn

Even when “maximum security” is not the product goal, funds in the envelope should still be reasonably safe.

People often pick weak or already-leaked passwords. The app enforces zxcvbn before hashing and rejects weak passphrase/PIN pairs.

User-typed secrets usually have lower entropy than machine-generated ones. Auto-fill (randomPassphrase() and randomPIN() in @mybucks.online/core) was added so strong credentials can be generated without the user inventing them for every gift.

For a one-time wallet: generate with auto-fill, fund, hand off, discard the credentials after claim. Do not reuse your email, bank, or MetaMask passwords.

There is no “forgot password” recovery. If credentials are lost, funds on that address are gone.