# Reaction Board
> ⚠️ **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)
---
An on-chain emoji reaction board. Each topic collects emoji reactions, and each
caller may register at most one reaction per topic (voters are tracked in an AVL
set). `Render` lists every topic with its emoji tallies and a total count.
**Realm path:** `gno.land/r/REPLACE_ADDR/reactions`
## Example calls
```
# React to a topic (creates the topic on demand). One reaction per caller.
React("gno 0.9 launch", "👍")
React("gno 0.9 launch", "❤️")
# Optionally pre-create an empty topic.
CreateTopic("weekend poll")
# View the board (all topics), or a single topic.
Render("")
Render("gno 0.9 launch")
```
A topic renders as a row like `👍 3 ❤️ 5 🎉 1` (sorted by count, then emoji),
followed by its total. Reacting twice to the same topic from the same address
aborts.
<!-- 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 -->
CreateTopic(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}, name string)
React(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}, name string, emoji string)
Render(path string) string
TopicCount() int
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.