# Time Capsule Guestbook

> ⚠️ **Experimental — generated with no human supervision.** This realm was
> produced automatically by an MCP-driven agent to exercise the gno MCP server
> and tooling, and to generate test content for gno compilers, linters and
> formatters. **Not audited. Not for production.** Full context & folder README:
> [r/moul/x/daily](https://github.com/moul/gno-contracts/blob/main/r/moul/x/daily/README.md)

---


A public guestbook with a twist: every message is sealed until a future block
height, chosen by its author when they leave it. Until then it's just a locked
entry showing who sealed it and when it opens; once the chain reaches that
height, the message unlocks forever for anyone to read.

Realm: `gno.land/r/g12cs4cehujpffpjpywmkqj43m6u5ya53nj69sjz/timecapsule`

## Example calls

- `Leave("see you in 100 blocks", 100)` — seal a message that opens 100 blocks
  from now. Returns the capsule id. Only direct EOA (`MsgCall`) calls can seal
  one; empty messages, messages over 500 bytes, and delays outside
  `(0, 1_000_000]` blocks are rejected.
- `Render("")` — home page: counts + every already-unlocked message.
- `Render("sealed")` — every still-sealed capsule with its unlock height and
  blocks remaining (message hidden).
- `Render("capsule/<id>")` — a single capsule's detail page; shows the message
  only once unlocked.

## Toolchain status

Tested locally against a `gnolang/gno` master checkout (`~/p/gh/gnoland/gno`)
using its own `gno` binary as GNOROOT, resolving `/p/nt/*` deps through its
`examples/` workspace. All 5 unit tests pass (`gno test -v .`), and `gno lint .`
reports no issues. This is newer than sapphire (gno 0.9), but the code only uses
APIs documented as current in the project's gno skill (`chain`, `chain/runtime`,
`gno.land/p/nt/avl/v0`, `gno.land/p/nt/markdown/sanitize/v0`), so it should be
on-chain-valid for sapphire as well.

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---

Part of **[moul/gno-contracts](https://github.com/moul/gno-contracts)** — moul's versioned gno.land contracts. See the repository for the full catalog, build/test tooling, and usage.

**Dependency graph:**

![gno.land/r/moul/x/daily/timecapsule/v0 dependency graph](https://raw.githubusercontent.com/moul/gno-contracts/main/_assets/gno.land/r/moul/x/daily/timecapsule/v0/deps.png)

> 🧪 **Highly experimental — potentially vibe-coded.** Not audited; may break, change, or be removed at any time. Do not use with anything of value. Full disclaimer: [DISCLAIMER](https://github.com/moul/gno-contracts/blob/main/DISCLAIMER.md).

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