What Is Starknet and Why Listings Show a 10B Supply Cap?

Starknet is a layer 2 network that runs transactions away from Ethereum, proves they were executed correctly, and posts that proof back to Ethereum for checking. STRK is its native token. You pay Starknet transaction fees in it, you can stake it, and you vote with it on protocol changes.

Both major price aggregators publish a STRK total supply of 10,000,000,000 and a maximum supply of the same figure. Starknet's Ethereum contract disagreed when we read it at block 25,940,909 on 9 September 2026, returning 10,162,500,000 STRK. That is 162,500,000 more, and the issuer's own documentation says there is no cap at all.

Starknet (STRK) at a Glance

What Is Starknet

Starknet's own documentation describes it as a decentralised, permissionless layer 2 validity rollup that scales Ethereum using zero-knowledge proofs. It bundles thousands of transactions away from Ethereum and settles them there once they have been verified. If you have read anything about what Ethereum layer 2 solutions do, that is the family it belongs to.

Two design choices set it apart from the crowd. Every account on Starknet is itself a smart contract, so the rules for approving a transaction are written in software rather than fixed by the protocol. That lets a wallet use multiple signers, temporary session keys or a passkey without anyone changing the network.

The second is the fee token. Fees on Starknet were once payable in Ether, then in either Ether or STRK. Since the release of version 0.14.0 on 1 September 2025, Starknet's documentation states that transaction fees can only be paid with STRK. It works like a toll road that accepts one currency. If you use the network at all, you hold the token.

Why the 10 Billion Supply Number Stopped Being True

Open almost any STRK listing page and you will read a total supply of ten billion and a maximum supply of ten billion. Neither figure survives contact with the contracts.

The method, in case you want to repeat it yourself. We called the total-supply function on the Ethereum contract at block 25,940,909, timestamped 9 September 2026 at 16:08 UTC, and on the Starknet contract at block 14,613,788, timestamped 16:06 UTC the same day. Both addresses are in the table above. Three independent Ethereum nodes and two independent Starknet nodes returned identical values.

The Ethereum contract returned 10,162,500,000 STRK, which is 1.625% above ten billion. The Starknet contract returned 3,805,293,274.848997 STRK. These are two different objects and they are supposed to disagree, because the Starknet figure counts only what has been bridged across, not the whole token. Aggregators then publish a third number for circulating supply, 7,181,521,515 STRK. None of the three is ten billion.

The supply cap is the part that is simply wrong rather than merely stale. Starknet's documentation says ten billion tokens were created in May 2022 and minted on chain on 30 November 2022. It then adds something the listing pages drop. Total supply rises over time as the protocol mints new tokens for staking rewards. It publishes the curve that governs the rate: the minting percentage is four per cent divided by ten, multiplied by the square root of the percentage of supply that is staked. Feed in the 800 million STRK that Starknet reported staked in its quarterly recap of 4 November 2025. You get roughly 1.12% a year, and that's the same ballpark as the "around 1%" the recap itself quotes. It's a small number, it isn't zero, and nothing in the contract stops it.

The circulating figure has an innocent explanation the listing pages leave out. Starknet's documentation says tokens held by its foundation are not counted as circulating even once they are contractually unlocked, until they are granted or allocated out. So the aggregator number is a judgement call about wallets, not a chain reading. That is exactly why circulating supply and total supply are not the same thing, and why quoting one when you mean the other changes the answer by billions.

What a Validity Proof Actually Buys You

Think of it as the difference between marking an exam and being handed a receipt that the marking was done correctly. Optimistic rollups assume a batch is fine and give anyone a window to challenge it. A validity rollup proves the batch first, and Ethereum checks the proof rather than the work.

Starknet's documentation describes the pipeline plainly enough to quote. Proofs are generated and aggregated so that many blocks of execution compress into one succinct artefact. That artefact goes to Ethereum to be verified, so Starknet's execution can be trusted without re-running it. Alongside that, compressed state differences are published to Ethereum so the full state can be reconstructed and checked independently.

What you buy is settlement you do not have to wait out and do not have to trust a watchdog to police. What you do not buy is a network with no operator, and Starknet says so itself. Its documentation still describes the chain as centralised while it hands responsibility to validators in stages. If you want the fuller picture, we have written up how validity proofs differ from optimistic rollups.

Why STRK Is Not the Only Asset Securing Starknet

Starknet's staking documentation lists a parameter most token pages never mention. Bitcoin carries a weight of 0.25 in staking power on mainnet, against 0.75 for STRK. Bitcoin holders lock a curated set of tokenised Bitcoin representations on Starknet and earn their rewards in STRK. On that basis Starknet describes itself as the first rollup running a dual-token consensus. The mainnet rules around it are specific: 20,000 STRK minimum to run as a validator, and a seven-day lockup before a withdrawal completes.

The scale is harder to pin down than the design. In the quarterly recap it published on 4 November 2025, Starknet reported more than 800 million STRK staked, over 19% of circulating supply. It counted 659 BTC alongside that, for a combined value it put above $150 million. Those figures are dated and the network has kept moving since. Treat them as the last ones the issuer put its name to, not as a live reading.

The design point survives whatever the running total says. A quarter of the security budget of an Ethereum rollup is denominated in an asset with no connection to Ethereum. The yield on it gets paid in the token whose supply this article is about.

What Moves the STRK Price

Scheduled unlocks. Starknet's documentation sets out a monthly release for investors and early contributors. It runs to 1.27% of supply, roughly 127 million tokens, on the fifteenth of each month through 15 March 2027. That's a calendar you can mark rather than a rumour you have to price.

Fee demand. Because fees are payable only in STRK, activity on the network converts directly into buying that the token would not otherwise see. Watch usage, not announcements.

Staking participation. The minting curve means the two things move together. More STRK staked lifts the annual mint, and a bigger mint dilutes everyone who is not staking. The rate is low, so this is a slow pressure rather than a shock.

Bitcoin staking growth cuts both ways. Every new tokenised Bitcoin locked into consensus earns rewards paid out in freshly minted STRK. So this leg of the design adds sell-side supply even while it adds security.

The macro calendar sets the tape. US producer prices land Thursday 10 September at 12:30 UTC and consumer prices Friday 11 September at the same hour. The Federal Reserve meets on 15 and 16 September and publishes projections. Small tokens often move on those prints more than on their own news.

What Are the Risks

Supply is uncapped by design. STRK has no maximum supply, whatever the listing pages print. Any valuation model you build on a fixed ten billion rests on a number that's already wrong by 162,500,000 tokens.

The market cap you read depends on which supply is used. At the Tuesday 8 September close of $0.030574795, the published circulating supply gives about $219.6 million. The Ethereum contract's total gives about $310.7 million. Same price, same day, a gap of roughly $91.1 million created purely by the choice of denominator.

The network is not finished. Starknet's own staking documentation places the protocol in the second of four phases, and describes the chain as centralised while that transition runs. Decentralisation is a roadmap here rather than a property you already own.

A small group can change the core contracts. Starknet documents a twelve-member Security Council with administrative control over its core contracts on both Starknet and Ethereum. It can upgrade, pause and unpause them. That exists so the network can answer an attack in minutes, and it's still a concentrated power.

Two feeds disagree on the price by more than most. CoinGecko and CoinPaprika closed 1.786% apart on Tuesday 8 September, the widest gap across the assets we checked that session. On a token quoted in thousandths of a cent, which feed you read changes your entry.

You cannot trade it here. STRK isn't available on Phemex, as spot or as futures, and nothing in this article should be read as saying otherwise.

Final Thoughts

The interesting thing about Starknet isn't that a data provider got a number wrong. It's that the same wrong number turns up everywhere, and that it has been wrong for a long stretch. Checking it takes two calls to a public node that anyone can make for free.

Read the supply as a live reading with a block number attached rather than a fact you memorise. Ten billion was true on 30 November 2022, and ten billion and change is true at the block we read. The gap between those two sentences is the reason to look things up yourself. It applies to every token with a staking reward attached, not to this one alone.

This article is for informational purposes only and does not constitute financial or investment advice. Cryptocurrency trading involves substantial risk. Always conduct your own research before making trading decisions.