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Aerarium · Temple of SaturnJakarta, Indonesia

National market infrastructure for Indonesian crypto

One price forthe whole archipelago.

SATU consolidates every licensed Indonesian exchange into one national order book. One price, best execution in under 100 ms, cleared onshore and co-signed by the bourse, clearer, custodian and regulator.

A proposed market facility. Subject to bourse rulebook adoption and regulatory approval.

Engraving of a Roman temple facade with eight columns on a raised podium, the treasury of Rome.

Every licensed Indonesian exchange, consolidated into one national order book.

Cleared onshore. Co-signed by the bourse, clearer, custodian and regulator.

Explore ↓
< 100ms
Best execution, local book to national sweep
1
National price, shown in every participating app
4
Institutions co-sign the record: bourse, clearer, custodian, regulator
0
New apps, accounts or migrations for retail
IIThe problem

Same asset. Same country. A different price on every app you open.

Each licensed exchange runs its own isolated order book. A retail trader on a thinner book pays far more for the same trade, and never sees it. The book below is a live simulation of what one consolidated national tape looks like.

Tabula ISATU tape · BTC/IDR · consolidated
 
Offers
Bids
National spread 
Illustrative simulation. Six anonymous exchanges, one consolidated tape.
 
Cost on the local book alone
 
average impact; last fills far worse
Cost through SATU, all in
 
price impact plus access fee

The same order that costs 1% on the deepest book can cost 5 to 10% on a thin one. The exchange cannot fix it alone. SATU fills the residual from the whole market at the national price.

IIIWhat SATU does

Three capabilities. One national market.

SATU sits between the exchanges and the bourse. It replaces no exchange, and no retail trader ever touches it directly.

Every exchange’s displayed depth is combined into a single national best bid and offer, published by the bourse and shown in every participating app.

When an exchange cannot fill an order at the national price from its own book, SATU fills the rest from the other exchanges, in under 100 milliseconds. The trader sees one fill and one receipt.

Every routed order, fill and fee is hash-chained, then co-signed each window by the bourse, clearer, custodian and regulator. No single party, SATU included, can rewrite it. No blockchain.

Select a capability

Engraving of a Roman silver denarius showing a laureate profile.Engraving of a Roman bronze balance with two level pans.Engraving of a Roman wax tablet with tally marks and a stylus.
IVThe path of one order

Five stations, under 100 milliseconds.

Every order that leaves an exchange takes the same road. Nothing skips a station and nothing reaches a book without a place on the record.

Stations

  1. I

    Order

    An order arrives that its home exchange cannot fully fill at the national price.

  2. II

    Sequencer

    One deterministic queue. Every order gets a number and a time, in the order it arrived.

  3. III

    Route

    Local book first, then a price-priority sweep across every book, then an auction for what is left.

  4. IV

    Clear and custody

    Settled onshore, in rupiah, through a licensed clearing house and custodian.

  5. V

    Checkpoint

    Each window is hash-chained and co-signed by four institutions before it is final.

Routing tiers

Tier 0

The local book

The exchange fills what it can at the national price. Its customer, its volume, its fee.

Tier 1

The national sweep

The residual sweeps every book in price order. Ties split by time and by size, so no single exchange takes everything.

Tier 2

The sealed auction

Large residuals go to a sealed-bid auction among liquidity providers, checked against the reference price.

VWho it serves

Everyone gains. Nobody changes how they work.

Earn on the depth you hold. Keep the customers you serve.

Flow that reaches your book is your volume and your fee, plus an access fee on top. Flow you cannot fill goes to the national market and the customer stays on your app.

What you get
  • A new revenue line on liquidity you already hold: 40% of the access fee, pro-rata to fills
  • A 15% rebate on every order you route out, and the customer stays yours
  • A fair allocation rule: no single exchange takes everything
  • Connection in twenty days. SATU does the work.
What you never do

Deploy software. Change your matching engine. Share customer data.

VIThe economics

One access fee. Split five ways, automatically.

Every routed order carries an access fee on top of the exchange’s own trading fee. It is divided the same way on every trade, and the largest share goes to the exchanges lending the depth.

Lenders

Exchanges whose books filled the order, pro-rata to fills

Bourse

Publishes the national price and runs the rulebook

SATU

Operates the router, the tape and the record

Originator

The exchange that sent the order, and keeps the customer

Regulator

Supervisory levy, paid automatically

Access fee waterfall · lenders 40% · bourse 20% · SATU 20% · originating exchange 15% · regulator 5%Column height is proportional to each share of the access fee.
VIIThe cost of a wide spread

A wide bid and offer does not just overcharge retail. It deletes trades.

Every basis point above the national price overcharges the traders who trade anyway, and stops the ones who would have. The first is a transfer. The second is deadweight loss, value nobody collects.

Overpaid by traders who still tradeLost trades (deadweight loss)
250 900
Deadweight loss recovered
 
trades that come back, per year
Overpayment avoided
 
kept by retail instead of lost to slippage
New volume
 
trades that did not exist
New exchange fee revenue
 
at 0.2% average, on new volume

Illustrative. Demand for trading falls with cost. Volume calibrated to Rp 100 tn a year on thin books at today’s cost; SATU all-in cost 220 bps. The rectangle is money retail loses today on trades they still make. The triangle is trades that never happen.

Etching by Piranesi of the ruined Temple of Saturn on the Roman Forum, its columns still standing.
Rome kept its treasury in a temple, in public view, on the Forum.SATU keeps the national record the same way.
Request a briefing ↗

G. B. Piranesi, Veduta del Tempio detto della Concordia (the Temple of Saturn), Vedute di Roma, 1760 to 1778. The Metropolitan Museum of Art, CC0.

VIIIHow exchanges join

Two kinds of exchange. One reason to join.

Engraving of a Corinthian column capital with acanthus leaves.
Order-book exchanges

Lend the depth you already hold.

Your book becomes part of the national price. Every rupiah routed to your book earns a share of the access fee on top of your trading fee, and flow you cannot fill goes to the market while the customer stays on your app.

Quote-based exchanges

The better of your provider and the whole market.

Keep your instant-buy experience. On every order, compare your provider’s quote with the national market and send the order the better way. Keep more commission, settle in rupiah at home, and trade through a structure designed so each sale is taxed once.

Liquidity providers

One connection, every exchange’s flow.

Quote into the national auction against a global reference price, settle onshore through a licensed clearing house and custodian, and reach every participating exchange instead of one.

Reference price

Checked against the world, every second.

The national price is continuously compared with an independent global reference. A sudden move away pauses routing until the price returns inside the band or the bourse clears it. The rupiah market keeps its own price; the reference only guards it.

IXConnecting an exchange

Twenty days, two of them yours.

SATU does the integration work. The exchange names two contacts, creates one key and countersigns one record.

  1. Day 0

    Kick-off

    A 30-minute call. You name one operations and one technical contact.

  2. Day 2

    Recording

    SATU records 24 hours of your public depth feed. You do nothing.

  3. Day 5

    Certified

    The adapter matches your book to 99.9% fidelity. You create one trade-only key, no withdrawal.

  4. Day 8

    Sandbox

    Order tests in your sandbox: fills, partial fills, rejects, rate limits.

  5. Day 19

    Observe-only

    SATU runs alongside your live book and routes nothing. Your dashboard is open.

  6. Day 20

    Live

    You countersign the certification record. Your book joins the national price.

No live order before fidelity passes. No routing before the record is countersigned.

XRoadmap

From reference price to national market, in three steps.

MMXXVI
Now

Pilot

Two licensed exchanges on a read-only national price feed, under bourse sponsorship.

MMXXVII
Q1 2027

National price

All founding exchanges connected. One price published in every app.

MMXXVII
Q4 2027

Best execution

Orders filled from the whole market. Receipts on every trade.

MMXXVIII
2028

Beyond one bourse

A second Indonesian bourse and offshore USD and USDT venues on the same engine.

XILexicon

Six words, defined once.

INational price
The best bid and best offer across every connected book, published by the bourse. Sometimes called the IBBO.
IIResidual
The part of an order an exchange cannot fill at the national price from its own book.
IIIAccess fee
The fee on a routed order, on top of the exchange’s own trading fee, split five ways on every trade.
IVLender
An exchange whose resting orders fill someone else’s residual. It earns 40% of the access fee.
VOriginator
The exchange that sent the order. It keeps the customer and a 15% rebate.
VICheckpoint
A window of the record, hash-chained and co-signed by the bourse, clearer, custodian and regulator.
Engraving of a classical marble bust of Juno Moneta on a pedestal.
XIIContact

Built to institutional standard. Ready for the bourse.

For bourses, licensed exchanges, regulators and clearing houses. See the live console and the technical, governance and commercial documentation.