One money · the thesis
Gravity
and velocity.
xCoin is gravity. One asset, 100,000,000 Ӿ XID, every unit mined, final settlement in whole sats, a claim on no one. The dollar is velocity. The US dollar, and after it the other top fiat units, keep moving the way they move today: priced, spent, invoiced and cleared at speed, as claims on the issuers whose names are on them.
Velocity without gravity flies apart. Gravity without velocity sits still. xCoin is a ledger built to hold both without blending them: the dollar keeps its speed and its issuer, XID keeps its supply and its finality, and the chain records where the two touch.
Gravity · Ӿ XID
What holds still
- One supply rule. 100,000,000 and never more, enforced by every node, committed through the charter in block 0.
- One settlement unit. Whatever finally settles on the chain settles in XID, in whole sats. No second protocol asset, ever.
- A claim on no one. A unit of XID belongs to whoever satisfies its spending condition, and to nobody else. No issuer, no freeze, no reissue.
- Mass that cannot be minted. No premine, no founder allocation, no token sale. Every Ӿ was mined by someone who paid electricity for it.
Velocity · the dollar first
What keeps moving
- Priced in dollars. People price in the unit they already use. Nothing on xCoin asks a merchant to think in sats.
- Issued by a name. A dollar on xCoin is a bill: a named, licensed issuer owes its holder a dollar. Honored, frozen, reversed or reissued by that issuer alone.
- Cleared at speed. Bills move at the pace of commerce; the chain records registration, order and finality, not the issuer's balance sheet.
- Then the rest. Euro, yen, pound: the same shape, each a claim on its own issuer, each orbiting the same gravity.
In the interest of the United States of America
The dollar stays the unit of account. The rail gets post-quantum signatures.
xCoin is built and run in the United States by Distributed Ledger Technologies of Passaic, New Jersey, and it is designed to serve the interest of the United States: not by replacing the dollar, but by giving the dollar a settlement rail that no adversary with a quantum computer can forge a signature on. Every spend is signed with ML-DSA-65, the NIST standard the federal government has already mandated for its own systems. The dollar keeps its velocity; the rail gains post-quantum gravity.
- Dollar-first by design. The first claims to circulate on xCoin are dollar bills from licensed US issuers. Foreign units follow the dollar, not the other way round.
- No foreign issuer at the base. XID has no issuer at all, so no one abroad can print it, freeze it, or steer the chain. The code is open, MIT-licensed, and validated from genesis by anyone who runs it.
- Ahead of the migration deadline. Federal PQ migration is scheduled through 2035. xCoin never issues a classical key, so there is nothing to migrate and no dormant balance left exposed.
- Mined on American desks. MetalDAG favors the hardware people already own over warehouse chips, keeping the mining base broad, domestic and hard to capture.
The thesis
xCoin rests on one decision: there is one asset, and everything else is a claim on someone. XID has one supply rule, 100,000,000 and never more, enforced by every node and committed through the charter in the genesis block. It has one settlement unit: whatever finally settles on the chain settles in XID, in whole sats. And it is one thing anyone ultimately owns: a unit of XID belongs to whoever satisfies the spending condition committed in its output, and to nobody else. A dollar balance, a bill, a merchant's receivable can all be built on top of that, and each resolves, when it resolves at all, either to an issuer's promise or to XID. The chain records the second and stays out of the first.
What “one money” means
XID is the only bearer asset, and nobody issues it. Supply is created by the emission schedule and by nothing else. Block 0 mints nothing; its coinbase carries the charter's commitment, not money. Every XID is mined, none are granted: no premine, no founder allocation, no token sale.
The Annual Tenth. Blocks 1–20,000 pay 6.25 XID, 20,001–40,000 pay 12.5, 40,001–60,000 pay 25, and 60,001–220,000 pay 50 (to about December 2028). From block 220,001 the reward is 10% less every 110,000 blocks (about 382 days): 45, 40.50, 36.45 … never below 1.5 XID (about 2063 to 2325), then it fades 10% a step to a 0.1 XID tail; the last coin is mined around 2363, exactly 100,000,000 XID. 25% of the cap is mined by about 2032, 50% by 2046, 75% by 2177, 99% by 2330. Full schedule.
Other units circulate on top, as claims. A dollar on xCoin will be a claim on a licensed issuer: a bill that says a named issuer owes its holder a dollar. Every property that bill has, whether it is honored, frozen, reversed or reissued, comes from its issuer. Every property XID has, its supply, its ownership rule, its settlement, comes from the chain. The two never blend.
The chain belongs to whoever holds and runs it. There is no administrative key: no key, no signer and no message anybody can transmit to steer the chain. Whoever runs a node enforces the rules, whoever mines extends the chain, whoever holds XID owns what they hold. The code is MIT-licensed; anyone may build on it.
What it does not mean
It does not mean xCoin issues a dollar, or backs one. The chain holds no reserves, vouches for no issuer and carries no second protocol asset. A dollar bill on xCoin is the liability of the issuer whose name is on it, and of nobody else.
It does not mean a bill inherits the chain's properties. Registering a bill on xCoin proves that it was registered, when, and in what order; it does not make the issuer solvent. A bill is exactly as good as its issuer; XID is exactly as good as the chain.
It does not mean prices are written in XID. People price in the unit they already use. What changes is where the dollar is registered and where it settles.
The base layer as it stands
Rules in the code, stated as rules; the chain they govern is not running. Every figure is in the whitepaper with its parameter name.
| Rule | As written in the code |
|---|---|
| Supply and emission | 100,000,000 XID, 8 decimals (100,000,000 sat each), the whole cap mined. A warm-up of 6.25, 12.5 and 25 XID for 20,000 blocks each, then 50 XID per block to block 220,000, then 10% less every 110,000 blocks (about 382 days), never below a 1.5 XID floor (about 2063 to 2325), then a fade of 10% a step to a 0.1 XID tail and the last coin around 2363, exactly 100,000,000 XID. No premine, no founder allocation; 8 decimals. |
| Proof of work and difficulty | MetalDAG, memory-hard, Ethash-family, Apple-Silicon-favoring: a 4 GiB dataset at launch growing 128 MiB every 14-day epoch. 300-second blocks. Anchored ASERT, two-hour half-life, retargeted every block, no minimum-difficulty blocks. |
| Post-quantum signatures | Every spend is signed with ML-DSA-65 (FIPS 204) or the hash-based fallback SLH-DSA-SHA2-128s (FIPS 205). Legacy script types are rejected at consensus: no ECDSA, no Schnorr. The commitment hash is SHA-256. |
| The witness v3 script tree | Every output is a 32-byte program committing to the Merkle root of algorithm-tagged leaves, with no key path. Leaf 0xc0 is ML-DSA-65, 0xc2 is SLH-DSA-SHA2-128s; 0xc4 (proof predicate) and 0xc6 (ledger commitment, Merkle exit) are reserved. Mainnet addresses read xpa1r…. |
| No premine | Block 0 mints nothing; supply begins at zero. No founder allocation, no token sale. Block 1 is an ordinary block paying the block subsidy plus fees to whoever mines it. |
| No administrative key | No key, no signer and no message anybody can transmit can steer the chain; the charter forbids one at this layer. No checkpoints and no assume-valid: a node validates from genesis on its own. |
| No levy | Zero rate, zero cap at genesis: no transaction owes a levy, and fees are set by relay policy and the fee market alone. The machinery is dormant in the code. |
| Three chains | Mainnet, testnet A and regtest, nothing else. Testnet A is the rehearsal chain, a private chain with its own identity; its coins have no value. It is retired (ledger archived at height 3,555); mainnet has been live since September 26, 2026, 00:00 UTC, explorer at superknet.com. |
| Status | Mainnet is live: genesis was mined September 26, 2026, 00:00:00 UTC. Genesis hash 3bc1a36df7d786a5c4584e21d248e0a3785a96aaa60a5b3959dfad50283379f2; charter hash fd9b475afdbe178864f32802726cc60c27290c09efd472d0934b1c733d3b9340; currency id e6e4ae00e1d3b25a7e4c2e94d3216d70f6b6f2e7cbd38bf23acaed391edea060. |
What the chain provides to anything built on it
A time. Every block carries a timestamp, and a block stamped more than two hours ahead of a node's clock is rejected; anything committed in a block is committed at that height and time.
An order. Blocks are numbered and each transaction sits at one height. An output spends once; of two claims to the same coin, the chain keeps the one it ordered first.
Settlement in XID. Everything that moves XID moves on the chain, in whole sats, under the spending condition committed in the output; ledgers that account in msat round to whole sats when they settle. There is no key that reverses a spend.
Non-equivocation for anchored registers. The data carrier takes an 80-byte OP_RETURN per transaction under relay policy, one anchor, and at most 8,000 bytes per block at consensus. A register that publishes its state root in a block has committed to one history for that height: anyone holding its data can check it against the root, and a second root for the same register and height is a visible contradiction, not a quiet rewrite. The charter says as much: the chain records supply and ownership, anchors the commitments of ledgers that carry everyday payments, and settles between them.
What it does not provide
It does not verify an issuer's reserves. The chain sees a 32-byte root, not a bank balance. Whether the dollars behind a register exist is a question for the issuer's auditor and regulator.
It does not force an issuer to serve. The chain cannot make an issuer honor a bill, cannot stop one from refusing, and cannot pay a holder whose issuer will not. What it can do is keep the record: a bill that was registered stays registered, at its height, whatever the issuer does afterward.
It does not carry retail volume. The charter says it plainly: the chain is not a payment rail, and its capacity is sized for security and finality, not for retail volume. Retail activity on ledgers above the chain is not part of its history.
The layers above
Above the chain there will be a payment rail carrying dollar-denominated bills, registered on xCoin and settled on xCoin. A bill will be a licensed issuer's promise to pay its holder a stated number of dollars. Registered will mean that the rail's register anchors its state to the chain through the data carrier, so that a bill's existence and its holder at a given height are committed in a block anyone can check. Settled will mean that what the rail's participants owe one another is closed in XID, on the chain, like any other spend. xPay will be the first implementation.
The rail will be permissionless for users, merchants, nodes and miners: anyone will be able to hold a bill, accept one, run a node of the rail, or mine the chain beneath it, without asking. It will be permissioned by law only for issuers: whoever issues a dollar bill owes its holder a dollar, and the law where that issuer sits decides who may take on that debt. That is not the chain's rule; it is the dollar's.
The honest boundary. A bill will be censorable by its issuer, because it will be that issuer's promise: the issuer can decline to honor it, freeze it, or be ordered to. XID is not, because there is nobody to order: it has no issuer, and the chain has no administrative key. A user of the rail will hold dollars that answer to an issuer on a chain that answers to no one.
CORA: the card network for xCoin and stablecoins
CORA is the planned payment network on top of that rail, the way Visa, Mastercard and American Express sit on top of bank money. It will be the rulebook merchants and card issuers join, and the switch that carries a tap at a till to settlement. A shop will accept CORA. Behind it, a payment will settle in XID or in a dollar stablecoin, whichever the customer holds. The customer does not have to know which.
For the person paying, nothing changes. A CORA card looks and works like the plastic in your wallet: tap it at the terminal, the payment goes through, you get a receipt. There is no app to open, no address to copy and no seed phrase at the checkout.
For the merchant, it will cost less. Card acceptance costs a merchant a percentage of every sale, shared between the issuing bank, the network and the processor. CORA will charge merchants a lower percentage than the card networks. The rate will be published before launch; this page quotes no number until it is final.
Why today's cards are 1990s technology
The chip in your card is a 1990s design. The EMV chip standard that Visa, Mastercard and Europay wrote in the mid-1990s is still what runs at almost every terminal. Many cards still carry a magnetic stripe from the decades before it, and online card payments still ask for a number, an expiry date and three printed digits that anyone who sees the card can copy.
Its signatures will not survive quantum computers. An EMV chip proves it is genuine with RSA public-key signatures. A large enough quantum computer breaks RSA outright. The industry has no date for replacing it across billions of cards and millions of terminals.
The rails underneath are slow. A card payment is approved in seconds but settled between banks days later, in batches, and a merchant can wait that long for the money.
What a CORA card uses instead
An NTAG 424 DNA chip. Every tap produces a fresh, one-time code computed with AES-128 inside the chip, from a key that never leaves it. A copied code is worthless the next second, and the chip cannot be cloned by reading it.
A different kind of cryptography. AES is symmetric encryption. Quantum computers break RSA and elliptic-curve signatures completely; against AES they only halve the effective key strength. The chain the payment settles on signs with ML-DSA-65, a post-quantum standard (FIPS 204), from block 1.
Settlement in minutes, not days. A CORA payment settles on xCoin, in XID or a dollar stablecoin, at the next blocks. There is no batch run between banks to wait for.
What is not promised. CORA is planned, not built. No CORA card has been issued, no merchant is signed up, and nothing on this page is an offer. Like the rail beneath it, it is in the future tense because that is where it is.
Why this and not a dual system
A dual system gives a chain two assets, a coin and a protocol-issued dollar, one backed by the other or by a reserve the protocol has to hold. The moment a protocol issues a dollar it has an issuer, the issuer needs a key, and the key is what every court, regulator and thief goes after. The chain then obeys whoever holds it.
xCoin takes the other shape: one anchor, many circulating media. The anchor obeys no one; its supply, its ownership rule and its settlement are the same for everyone. The dollar layer obeys the state that issues the dollar, because a dollar bill on xCoin is a dollar liability of a regulated issuer and carries that issuer's obligations with it. Nothing about the anchor changes when an issuer is licensed, fined or closed.
A user chooses which property they want. Hold XID and you hold the anchor: no issuer, no freeze, no reversal, and nobody's promise behind it. Hold a bill and you hold a dollar: an issuer's promise, an issuer's recourse, and an issuer's rules. Both settle in the same place. Neither pretends to be the other.
What is not promised
The date. Mainnet genesis was mined September 26, 2026 at 00:00 UTC, with post-quantum signatures and post-quantum node connections (ML-KEM-768, XIP-4) from block 0. Mainnet is live; follow it at superknet.com.
No price. Distributed Ledger Technologies sells no coins, lists XID on no exchange, and makes no claim about its value.
No throughput figure. The chain's capacity is sized for security and finality, not for retail volume. This page states no transactions-per-second number for anything.
No rail. Nothing above the chain is in the code; the rail and its bills are in the future tense because that is where they are.
No guarantee beyond the rules. What the chain guarantees is what its consensus rules enforce and every node checks: the supply, the ownership condition, the order, the anchor. Nothing on this page adds to that. The rules are in the whitepaper; the text the genesis coinbase commits to is the charter.