How a Rupiah Stablecoin Works: Peg, Backing, Minting

Imagine if your balance says 500,000 IDRX today. Next week it still says 500,000, and it is still worth Rp500,000. Yet the token sits on the same blockchain as crypto assets that can move 10 percent overnight.

What holds that number steady is not something built into the token itself. Three separate mechanisms work at the same time: the value reference (peg), the assets behind it (backing), and the control of how many tokens exist through minting and burning. The three terms get used as if they mean the same thing. They do not, and when a stablecoin runs into trouble, the part that breaks first is usually not the part people talk about most.

The three layers that keep a Rupiah stablecoin stable

A Rupiah stablecoin is a digital token whose value references the Rupiah, usually at one token to one Rupiah. How it works splits into three layers.

The first layer is the peg. This is the issuer’s promise that one token will be treated as equal to one Rupiah.

The second is backing. These are the real assets the issuer holds so the promise can be honored when someone comes to collect.

The third is minting and burning. This is the mechanism that keeps the number of tokens in circulation matched to the reserves held.

The closest analogy is a coupon at a night market. The peg is what is printed on the coupon: “good for Rp1”. The backing is the cash in the organizer’s safe. Minting and burning are the rules that the organizer may only print new coupons when money comes in, and must tear up coupons when money is withdrawn. A coupon with impressive printing and an empty safe is still an empty coupon. A full safe paired with an organizer quietly printing extra coupons ends the same way.

• Peg: the promise that the value holds

A peg is a value reference, not a mechanism. Saying a token is “pegged to the Rupiah” only tells you what it is measured against. It says nothing about how that measure is maintained.

There are two different ways to maintain a peg, and the difference between them is large.

The first is a peg supported by reserves. The issuer holds assets equal to the tokens in circulation and promises to convert tokens back into Rupiah whenever a holder asks. As long as that redemption promise is honored, the market price has a hard time straying far from Rp1.

The second is a peg supported by an algorithm. Token supply expands or contracts automatically based on price movement, without equivalent reserves behind it. Terra tested this model at scale with the UST token in 2022, and it collapsed within days once market confidence disappeared. Since then the unbacked model has largely been abandoned for serious use. The three models are compared separately in the article Types of Stablecoins.

For a Rupiah stablecoin meant to be transacted with, the first approach is the relevant one. That means the strength of the peg rests entirely on the next layer.

• Backing: the ability to keep that promise

Backing is the pool of assets an issuer holds against the tokens in circulation. This is where the quality of a stablecoin is actually determined, and where products differ most.

Three things separate healthy reserves from troubled ones.

First, composition. Reserves held entirely in bank cash and short-term government securities are far easier to liquidate than reserves filled with risky assets or receivables from affiliated parties. When a stablecoin struggles during heavy redemptions, the problem is almost always liquidity rather than total asset value. Reserves can look sufficient on paper and still fail to convert to cash fast enough.

Second, who holds them. Reserves kept at a bank or a separate custodian are better protected than reserves mixed with the issuer’s operating cash. That separation is what determines the fate of your money if the issuer itself runs into business trouble.

Third, who verifies them and how often. Two terms get confused here. An attestation is a limited examination by an independent accountant of the reserve position on a specific date. An audit is broader and deeper, usually covering a period and the processes involved rather than a single snapshot. Both are useful, but a monthly attestation is not equivalent to an annual audit, and a report published once a year gives you a picture that is already stale.

One more thing beginners often miss. A smart contract security audit, such as the work done by firms like CertiK, examines the program code. That is a different question from whether the reserves actually exist. A token can have perfectly clean code and inadequate reserves at the same time. You need both, and they are reported in different documents.

• Minting and Burning: how supply is controlled

Minting is the creation of new tokens. Burning is their destruction. Together they keep the number of tokens on the blockchain aligned with the reserves.

Minting on a fiat-backed Rupiah stablecoin usually runs like this. You send Rupiah to the issuer’s account, by bank transfer or through an exchange partner. The issuer verifies the incoming funds and your identity under KYC and anti money laundering rules. The funds enter the reserve account. The issuer calls the mint function in the smart contract, and tokens equal to that amount are created. The tokens are sent to your wallet address.

Burning runs in reverse. You return tokens to the issuer, the tokens are destroyed, and Rupiah is sent to your bank account. This process is usually called redemption.

Notice one thing about that sequence. Tokens are not created first and backed later. The order is always money first, tokens second. Reverse that order and what you hold stops being a claim on Rupiah and becomes a debt owed by the issuer, one that may not be fully covered.

This is why total token supply on the blockchain works as a checking tool. That data is public and anyone can look it up through a block explorer. If circulating supply exceeds the reserves reported, there is a gap that needs explaining.

Why the market price can drift away from Rp1

A peg is not a price forced onto the market. On an exchange, a stablecoin still trades on supply and demand, so the price can drift slightly, to Rp995 or Rp1,005 per token.

What pulls it back is arbitrage. If the market price falls to Rp990, anyone with redemption access can buy cheap tokens on the market, redeem them with the issuer at Rp1,000, and keep the difference. That buying pressure pushes the price back up. If the price rises above Rp1,000, the trade runs the other way.

This mechanism has one requirement that is easy to forget: redemption has to be genuinely open and reasonably fast. If the issuer restricts redemption, slows it down, or charges heavy fees, arbitrage stops being worth doing and the price can sit below the peg for a long time. A price gap that persists almost always points to the issuer’s side rather than the market.

The term for this condition is a depeg. Shallow, brief depegs are normal, especially in volatile markets. Deep and prolonged ones are a different story.

Smart contracts and multi-chain

A stablecoin lives as a smart contract on a blockchain, usually following a common token standard such as ERC-20 on Ethereum-based networks. The contract records who holds what, and executes mint and burn instructions.

Two things are worth knowing about that contract.

Mint and burn authority is restricted. Not just any address can create tokens. Usually only specific addresses controlled by the issuer can, often protected by a multisignature wallet that requires several approvals at once. If that authority rests on a single key, the risk concentrates in one point.

Regulated stablecoins typically also include a freeze function. The issuer can freeze the balance at a given address, for example under a law enforcement order or when funds come from a hack. This follows from being a product subject to financial regulation, and it does reduce the censorship resistance often praised in crypto assets. Better to know the function exists than to be surprised by it later.

On multi-chain, one stablecoin often exists on several blockchains so it can be used in more applications. What matters is that tokens on different chains are not automatically interchangeable. Moving between chains goes through a bridge, and bridges carry their own technical risk that has been exploited at scale several times in this industry. Always use the official contract address for the chain you are on.

Five things you can check yourself

The three layers sound technical, but checking them requires no special expertise. These five questions are enough to assess any stablecoin.

What to check	The question	Where to look
Issuer	Which legal entity is it and what is its licensing status in Indonesia	The issuer’s official site, the list of entities supervised by OJK
Reserve composition	How much is cash and government securities versus other assets	Transparency report or attestation
Verifier	Which accountant or auditor, and how often are reports published	The same report, check the date
Redemption	Can tokens be converted back to Rupiah, under what terms and fees	Product documentation and terms of service
Supply	Does circulating supply match the reserves reported	Block explorer, compared against the report

If you cannot find the answer to even one of these, that in itself is information. Seriously run stablecoins make all of it available, because that openness is the thing they are selling.

Where it stands legally in Indonesia

One point needs clearing up before you draw conclusions from the mechanics above: a token that works well technically still faces legal limits on how it can be used.

Law No. 4 of 2026, which amends Law No. 4 of 2023 on the Development and Strengthening of the Financial Sector, places crypto assets under the supervision of the Financial Services Authority (OJK) and requires business licensing for the parties involved. The Elucidation of Article 213 names stablecoins as one of the digital financial asset activities, with the note that their use as a means of transaction requires an exchange recommendation and OJK approval, and is not to be construed as a means of payment.

The distinction between a means of transaction and a means of payment is not wordplay. Its consequences are covered in full in the article Why Does Indonesia Need a Rupiah Stablecoin? The technical provisions on reserves and issuer obligations are not in this law at all. They are delegated to implementing regulations whose status you need to verify separately.

How IDRX handles the three layers

IDRX is a Rupiah-based stablecoin using the fiat-backed model, so the three layers apply exactly as described in this article. The peg is one to one against the Rupiah, the reserves consist of fiat funds and government securities, and tokens are only issued after funds arrive.

On the code side, the IDRX smart contract has been through a security assessment by CertiK, and the report is available to read. The reserve transparency report is published on the documentation page. Those two documents answer the two different questions discussed earlier, one about code and one about reserves.

Run both through the five questions in the table above. The same framework applies to any stablecoin, including ones not denominated in Rupiah.

Conclusion

The stability of a Rupiah stablecoin comes from three layers holding each other up. The peg sets the value reference. The backing provides the assets that make that reference redeemable. Minting and burning keep the token count aligned with the reserves.

The one thing worth taking away: a peg is a promise, and a promise has no value on its own. What determines the quality of a stablecoin is what sits behind that promise, who verifies it, and whether you can actually redeem when you need to.

Most of the material for judging that is public. Reserve reports can be read, on-chain supply is visible to anyone, and licensing status can be traced. What it takes is the habit of checking before you put money in.

Frequently asked questions

What is the difference between peg and backing? The peg is the value reference, for example one token equal to one Rupiah. The backing is the real assets the issuer holds so that reference can be honored on redemption. A peg without backing is just a statement.

Who mints Rupiah stablecoin tokens? The issuer does, through the mint function in the smart contract, and only after receiving funds from a user. That authority is restricted to specific addresses, usually protected by a multisignature wallet.

Can I check the circulating supply myself? Yes. Total supply is recorded publicly on the blockchain and visible through a block explorer. Compare that number against the reserves the issuer reports.

Why is a stablecoin price sometimes not exactly Rp1? Because on the secondary market the price is still set by supply and demand. Small gaps are normal and usually closed by arbitrage. A deep gap that persists is a signal of a problem on the issuer’s side or in liquidity.

What is a depeg and how serious is it? A depeg is when the market price moves away from the value reference. A thin, short depeg during volatile markets is not unusual. What deserves attention is a deep depeg that does not recover, since that usually points to problems with reserves or the redemption path.

Does a smart contract audit mean the reserves are safe? No. A smart contract audit examines the code, while the existence and quality of reserves are checked through an attestation or a financial audit. These are separate documents and you need to read both.

Is the same token identical across different blockchains? It references the same value, but the contract differs on each chain and moving between them goes through a bridge with its own risks. Always use the official contract address for the chain you are using.

Can I pay for things with a Rupiah stablecoin in Indonesia? Not as a means of payment. The legal tender in Indonesia is the Rupiah. Use as a means of transaction is possible subject to an exchange recommendation and OJK approval, which is a different legal status.

References

• Law of the Republic of Indonesia No. 4 of 2026 on the Amendment to Law No. 4 of 2023 on the Development and Strengthening of the Financial Sector, in particular Article 213 and its Elucidation, and Article 221A. Official text available via JDIH, peraturan.go.id.
• Law of the Republic of Indonesia No. 7 of 2011 on Currency. Official text available via JDIH, peraturan.go.id.
• Financial Services Authority (OJK), information and regulations on digital financial assets, ojk.go.id.
• Bank Indonesia, provisions on payment systems and financial sector technology innovation, bi.go.id.
• IDRX, technical documentation and transparency reports, docs.idrx.co and home.idrx.co/en/docs.
• CertiK, IDRX security assessment, home.idrx.co/docs/security-assesment-idrx.pdf.

Disclaimer

This article is educational and is not a solicitation to buy, sell, or hold any digital asset. Digital assets carry risk, including the risk of losing value. The legal provisions referenced here can change and may be interpreted differently, so consult the official text of the regulations and a qualified adviser before making any decision. Do your own research.