Pay to be heard.
Refunded if ignored.
You pay their price to send one message. Answer inside the window and they keep it — miss it and every cent comes back to you, without anyone having to ask.
Refunds are automatic. Window 24–168h, counted on chain. Escrow program Gu3j…kb9u. Solana devnet. Text off-chain — its hash on-chain.
Run one, start to finish.
Set a price and a window, then let it go. It plays itself as far as the fork and stops there, because the fork is the only part neither side controls.
Their door is open
The plate says what it costs and how long they take to answer. You read both before you spend anything.
One clock decides everything.
The escrow opens
Your payment goes into an account owned by the Knock program. Not to us, not to them. From here neither side can move it — only a reply or the clock can.
Read off the chain
Every escrow, on the chain
These accounts belong to the Solana program, not to Knock’s database. We read them the same way you can: point any Solana explorer at the program and count the same rows.
Reading the program’s accounts…
This asks the cluster directly, so it can take a moment.
Your side of the door
Price your attention
Move the three sliders. Two describe your inbox, one is your own guess about the people writing to you. The fee and the minimum come off the program itself.
How many strangers write to you now.
Reading the floor and the fee off the program…
This one is yours to set. Knock has no way to know how your senders would behave, so it does not fill this in for you.
3 of 25 get through, on your assumption
Each envelope stands for 2 messages. Drawn in ink: paid for. Drawn in pencil: they didn't write.
This is arithmetic on the three numbers you set, not a projection. You keep money only on the messages you answer inside your own window; anything you leave goes back to the sender.
Set your priceOne signature to start.
Your wallet is the account: it signs you in, pays the escrow and takes the refund. No password, no email, and no access to your X messages.