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Blockchain#tech-for-good2026

Waittt, CDC Vouchers actually use blockchain technology?

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What is programmable money ?

At its core, programmable money is exactly what it sounds like: money with embedded rules.

Instead of just handing someone a $10 note that can be spend anywhere, programmable money relies on smart contracts to dictate how, where, and when the money can be used. In Singapore, this is executed as Purposed-Bound Money (PBM).

*PBM are digital vouchers issued using tokenised Singapore Dollars (SGD) designed for real-world transactions with specific merchants.

But why ? (The death of Paper Vouchers)

Why bother using blockchain for a government handout? To solve massive administrative headaches and build a more efficient financial infrastructure.

Think about the old paper voucher systems. A hawker would have to physically collect paper slips, tally them up, submit them to an authority, and wait weeks for the cash to hit their bank account. It was slone, prone to loss, and ripe for fraud.

By using programmable money, the government can automate trust and efficiency:

=> Instant settlement, when a citizen scans their PBM voucher, the smart contract executes, and the merchant is paid in real SGD instantly.

=> Automated rules, where the vouchers are programmed to only work at participating local merchants and automatically expire on a set date, no manual auditing required.

=> Social good, proving that blockchain isn't just for crypto speculation; it can be practically applied to ensure public funds are distributed transparently and efficiently to the people and businesses that actually need them.

Beyond that ?

Under the hood, a PBM system stacks several key mechanisms to function securely without a traditional payment processor:

=> Digital currency backing, where every PBM is backed 1-to-1 by tokenised fiat curreny (like the SGD). This acts as the collateral, ensuring the voucher has real, stable monetary value.

=> The PBM wrapper which specifies the exact conditions under which the underlying digital currency can be released (e.g., " Only valid at heartland hawker stalls under December 31st").

=> PBM infrastructure is the underlying decentralised network that establishes the cryptographic accountability of the transaction, ensuring a voucher cannot be copied or double-spent.

=> PBM wallet is a cryptographic wallet meant to securely holds the user's private keys required for access and spending their purpose-bound assets.

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purpose boundinfrastructurefuture of vouchers

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