# Rock-Paper-Scissors Oracle
> ⚠️ **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 rock-paper-scissors opponent that doesn't roll dice — it studies you. The
oracle tallies every move you've ever thrown and always counters whichever
one you favor most, so a fixed habit gets punished while a genuinely mixed
(roughly 1/3-1/3-1/3) strategy is unbeatable in the long run. It's a live,
playable demo of the rock-paper-scissors mixed-strategy Nash equilibrium:
`Render` shows your win/loss/draw record, your move-history breakdown, and a
"predictability score" (your most-played move's share of your rounds — lower
means the oracle has less to work with).
**Realm path:** `gno.land/r/g12cs4cehujpffpjpywmkqj43m6u5ya53nj69sjz/rpsoracle`
## Example calls
```sh
# Play one round — the oracle predicts from your move history, then counters
gnokey maketx call \
-pkgpath "gno.land/r/g12cs4cehujpffpjpywmkqj43m6u5ya53nj69sjz/rpsoracle" \
-func Play -args "rock" \
-gas-fee 1000000ugnot -gas-wanted 2000000 -broadcast -chainid sapphire-1 <key>
# View the oracle's dashboard (total rounds, oracle win rate, top outwitter)
gnokey query vm/qrender \
--data "gno.land/r/g12cs4cehujpffpjpywmkqj43m6u5ya53nj69sjz/rpsoracle:"
# View one player's record and move-history breakdown
gnokey query vm/qrender \
--data "gno.land/r/g12cs4cehujpffpjpywmkqj43m6u5ya53nj69sjz/rpsoracle:g1youraddress..."
```
## Toolchain
Written against the sapphire (gno 0.9) stdlib split (`chain`, `chain/runtime`,
`gno.land/p/nt/avl/v0`, `gno.land/p/nt/testutils/v0`), following the same
crossing-function (`cur realm`) and `avl.Tree`-backed state patterns already
verified on this chain by the `rpsmatch` realm in this repo. The `gno` binary
on `PATH` here has its compiled-in `GNOROOT` pointing at a now-deleted
directory (`/private/tmp/gnoswap-review/gno`), and no Go toolchain is
available in this environment to rebuild a chain-matched binary per
`references/toolchain.md`, so `gno test` could not be run this time. The code
was instead reviewed by hand against the exact working patterns in
`rpsmatch` (same imports, same `cur.IsCurrent()` / `cur.Previous().Address()`
guard, same `avl.Tree` get-or-create, same `chain.Emit` call shape) and
against Go's array-indexing-by-named-integer-type rule for the `Move`-keyed
`Counts` array.
<!-- 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 -->
Play(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}, moveStr string) string
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.