Ledger Book
Permanent guestbooks on Cardano.
- 1 · Name
- 2 · Ownership
- 3 · Cost
- 4 · Wallet
- 5 · Done
This exact cover is generated in your browser and minted on-chain with the NFT — what you see is what the chain keeps.
Who owns this book?
- The NFT arrives in your wallet — you hold the book.
- Whoever holds the NFT is the keeper: every future signature pays its ~1 ADA anchor to the wallet where the NFT lives.
- If the book moves wallets, the signatures already in it stay attached and travel with it.
- The minting window expires about an hour after creation — no future copy of this book can ever be minted.
What it costs
True cost of a book that outlives you: about 0.3 ADA. The fee scales with the size of the cover art, so your wallet will show you the exact number before you sign — that figure, not this one, is the one that gets spent.
Approve in your wallet
Connect first — you'll see exactly which wallet and network receive the book before anything is signed.
The minting policy is derived from your own wallet key — only you could have minted it. Minting the same name twice from the same wallet creates a duplicate; pick a new name instead.
Wallets: Eternl (desktop or mobile dapp browser) officially supported · VESPR works (experimental).
Your book exists
Share the link — anyone who opens it can sign your book.
- No account
- Read for free
- Verified from Cardano
How it works
A book is an NFT
Your guestbook lives in your wallet. Whoever holds the NFT holds the book — and the signatures follow it wherever it goes.
A signature is a transaction
One ~1 ADA transaction writes a name into Cardano forever. The anchor is paid to the book's keeper, not to a platform — the guest brings a gift, and nobody sells the wall.
No database, no landlord
This page stores nothing. It reads the book fresh out of the chain every time — mirror this one file anywhere and the books follow, because the books are the chain.
How can this last forever?
A book is a wallet (or an NFT)
A signature is a transaction paying the protocol-minimum anchor (~1 ADA) to the book's address, carrying the entry in metadata label 22031. Books are found by $handle, address, or book NFT (policy.Name) — an NFT book lives wherever its holder's wallet is.
Any reader can read any book
This page holds no database — it asks the chain for transactions to the book's address and lays out the pages fresh. Deep-link any book with ?book=…. Mirror this file anywhere; the books follow, because the books are the chain.
Open source, open protocol
The format is specified and MIT-licensed — build your own reader, skin it, embed it. Attribution is cryptographic: every entry is signed by its author's own wallet keys, and each card links to its transaction.
Why a signature costs something
Free comments are written for the algorithm — endless, unverifiable, gone when the platform goes. A signature here costs ~1 ADA, and the anchor goes to the book's keeper, not to a platform: the guest brings a gift, and nobody sells the wall. The price is a filter, not a fee — and it makes spam self-defeating: every unwanted message pays the person being spammed and carries the spammer's own wallet address, on a public ledger, forever. A book fills with dozens of signatures that meant something, not thousands of posts that didn't.
…
Someone has to be first — and first is forever.
Sign the book of …
On a feed you talk to the room. In a book you write for whoever opens it in fifty years.
- Public forever
- Cannot be edited or deleted
- Signed from your wallet address
Wallets: Eternl (desktop or mobile dapp browser) officially supported · VESPR works (experimental). The anchor is a small gift to whoever holds the book; the fee goes to the protocol.