Interactive reference workspace

A phrase can carry a payment claim.

Issue a phrase-protected sample note, pass it on, and redeem it against a simulated balance. No wallet, funds, or live network are involved.

The point is the control surface: a phrase, checksum, deadline, and redemption record travel with the note rather than being reconstructed later.

Start the Walkthrough Review Cambio Architecture

Simulation state Not connected

Issue noteChoose value, deadline, phrase

Redeem claimValidate phrase and amount

Record outcomeBalance and event trail update

Ready to issue a sample note.

Credential: Phrase + checksum
Default: Simulated only
Window: 1 to 90 days

01 / Issue

Create the note record.

Set a value, a redemption window, and an optional phrase. The walkthrough derives the checksum, hashes the phrase, and creates a shareable local state.

Input controlsSample data

Amount (T3 dollars) For the demo we treat the value as whole-dollar units.

Hold window (days) Cambios configure the deadline that governs redemption.

Optional custom phrase Must be between 8 and 160 characters if provided.

Note record No note issued

Amount: —
Phrase: —
Checksum (5-char): —
Note ID (keccak256): —
Issued: —
Redeem before: —

Write the phrase and 5-character checksum on paper or print the QR. Anyone holding it can redeem inside the HalfLife window once they prove knowledge of the phrase.

02 / Redeem

Validate the claim.

Enter the complete phrase and a partial or full amount. The simulation checks the phrase hash, prevents over-redemption, and appends the outcome to the event trail.

Event trailLocal record

Redemption ledger

No redemptions yet. Issue a note to begin.

Original amount —

Remaining balance —

Control primitives

What this small interface is testing.

Configurable window 24h–90d HalfLife

Phrase hash stored keccak256

Audit evidence Receipts + metadata