# 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.
<!-- BEGIN GNOCONTRACTS FOOTER (generated by `make readmes`; do not edit below) -->
---
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:**
> 🧪 **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).
<!-- END GNOCONTRACTS FOOTER -->
Leave(cur interface {.seal func(); Address func() .uverse.address; IsCode func() bool; IsCurrent func() bool; IsEphemeral func() bool; IsUser func() bool; IsUserCall func() bool; IsUserRun func() bool; PkgPath func() string; Previous func() .uverse.realm; String func() string; Sub func(string) .uverse.realm; Subpath func() string}, message string, delayBlocks int64) int64
Render(path string) string
Signatures reconstructed verbatim from vm/qfuncs — interface params keep their inline definitions.
vm/qrender output, sanitized (docs/render-security.md) and displayed in an empty-sandbox iframe — scripts, forms and popups cannot run. Links stay inert in-preview; right-click to open.