Blocks and runs, where a coin's money sits, what it costs, and how anyone can check what a coin did. Written for the version of OneLine running today.
OneLine turns one sentence into rules for a pump.fun coin. You test those rules with pretend money, then launch with a single wallet signature, and the coin runs them alone, paid from its own creator fees. Every run prints a ticket whose hash is anchored on Solana, so holders can check what happened without taking anyone's word for it.
A program is a set of lines. Each line opens with one event and runs its blocks from top to bottom. The blocks are the whole program: there is no code underneath them to edit.
Opens a line. Every line has exactly one, at the top, and nothing can sit above it.
Does one thing, such as a buy back or a post, then hands over to the block below it.
Holds blocks inside it and decides if they run: If, Chance, Repeat and Cooldown.
One block breaks the pattern: Stop ends the run where it stands, so nothing can sit under it.
Every block belongs to one category, and the category decides its line color.
Checks and Data have no blocks of their own. They live inside the inputs of other blocks: the question an If asks, a random pick, a coin stat such as market cap.
See every blockAn event fires. Fees land, someone trades, volume passes a step, a timer ticks, a level is crossed, the coin graduates or someone presses the page button. Every line that starts with that event gets its own run.
Blocks run top to bottom. Each block finishes before the next one starts, and later blocks can use values that earlier ones produced.
Wrappers decide. If, Chance, Repeat and Cooldown check their condition, then run or skip what sits inside. A Chance roll is printed on the ticket.
Memory carries over. State blocks keep values between runs, so a coin can count milestones or remember a name.
A run has a ceiling. 500 steps at most. If a money step fails, the run stops there and the ticket says why.
A simulated bonding curve, pretend wallets and a pretend vault. The test ride fires these events at your draft:
Trades are read from Solana and timers tick once a minute. Money blocks spend SOL from the coin's own vault, inside its limits, and every run prints a ticket.
Each coin gets its own vault at launch: a Solana wallet that receives the coin's creator fees and pays for everything its rules do. Here is who can do what with it.
| Who | Can | Cannot |
|---|---|---|
| The creator | CanReceive whatever the rules send them, for example a Send to the creator. | CannotWithdraw by hand, edit the rules, raise the limits or change where fees go. |
| OneLine | CanHold the vault key, encrypted, and sign the actions the locked rules produce, inside the limits. | CannotEdit a coin's rules or limits. The product has no edit path, for us or anyone. |
| The rules | CanBuy back, sell, burn, send and airdrop SOL and the coin's own token, and trade the stocks picked at launch. | CannotTouch any other token, spend past the limits, or spend more than the vault holds. |
| Anyone | CanLook up the vault on Solana and follow every move it makes, then match each one to a ticket. | CannotMove anything. |
The vault is a regular Solana keypair. OneLine's server generates it when you launch and stores the secret key encrypted with AES-256-GCM. You never hold it. The runner decrypts it only to sign an action that the coin's locked rules produced, inside the limits.
That makes OneLine a custodial operator. The vault is not a program-owned smart wallet, and Solana does not enforce the rules: OneLine's code does. What you can check is the record. Every move the vault makes is a public transaction, and every run has a ticket anchored on Solana, so a move without a matching ticket would be visible to anyone.
You never claim anything by hand. Collection runs on its own, and it is the start of most coins' rules.
pump.fun charges a creator fee on every buy and sell of the coin.
The coin's creator on pump.fun is its vault, so the fee is owed to the vault, not to a person.
Every minute it checks what is waiting. It collects at 0.01 SOL, or after 30 minutes if less has built up.
Lines that start with “When creator fees arrive” run with the exact amount collected.
Pretend in the builder, real on a launched coin. Every one of them spends from the coin's vault and from nowhere else.
When nobody fits a pick, for example no one bought in the last hour, the step is skipped and the ticket says so.
Every coin launches with spending caps. They are part of the program, so the fingerprint covers them and they lock with the rules.
A step that asks for more is cut down to what the limits and the vault allow, and its ticket line says it was capped. A rule can never spend more than the vault holds.
Once per coin. Your wallet shows it before you sign.
Sent from your wallet to the coin's own vault at launch, for setup and gas. It stays the coin's money.
OneLine takes no share. Every creator fee goes to the coin's vault.
A small amount, paid by the coin from its fees. With no AI credit, the step is skipped.
Transaction fees for vault actions are paid by the vault.
pump.fun does not depend on OneLine, so the coin keeps trading. Because OneLine holds the vault key, nobody else can run the rules while it is down. That is the cost of the custodial setup, and you should weigh it before you launch.
Every run prints a ticket, including runs where nothing moved. It records what happened, step by step, in a form anyone can check later.
The Verify page does the math in your browser. Open /verify?ticket=<id> or paste a ticket id there.
A ticket that has not been batched yet shows as waiting for the next batch. Once its root is on Solana, the result can only change if someone edits the ticket, and then it fails.
At launch the program freezes. Its fingerprint, the SHA-256 of the program's canonical JSON, goes on Solana inside the launch transaction as oneline:v1:<fingerprint>.
There is no edit button for the creator, for OneLine or for anyone else. The coin page shows the rules in plain English generated from those blocks, and the creator cannot write or change that text. To make a coin do something else, you launch a new coin.
The sentences on a coin page are written by OneLine from the blocks themselves. Nobody types them, so they say what the blocks do and nothing more. This is the Split the fees ready line, read out:
When creator fees arrive:
Airdrop half of the fees that arrived to all holders, by size.
Buy back the coin with half of the fees that arrived.
Burn all of the tokens the vault holds.
Type a sentence, pick a ready line, or stack blocks yourself. The builder shows the rules in plain English as you go.
Fire pretend buys, sells, fees, timers, dumps and graduation at your draft and watch what each block would move.
Name, ticker and picture, the same things pump.fun asks for.
It creates the coin on pump.fun with its vault set as creator, writes the rules fingerprint with the Memo program, pays the launch fee and sends 0.01 SOL to the vault.
After confirmation OneLine checks on Solana that the coin exists and that its creator is the vault. Then the runner starts on the coin's next event.
A coin can buy and sell tokenized stocks with its fees: xStocks issued by Backed, on Solana, swapped through Jupiter. A coin picks up to 3 at launch and that list never changes. They track a share price and are not shares.
The stock list and what to knowThe AI block writes a short post, a name, or a yes or no. Each call costs the coin a small amount, paid from its fees. If the coin has no AI credit, the step is skipped, the ticket says so, and the rest of the run carries on.
In the builder the AI block returns sample text. On a live coin, what it writes is used as written, with no person checking it first, and AI can be wrong.
Every launched coin gets a public page on OneLine. Holders use it to decide whether to trust the coin, so it shows the record:
