Pixel Canvas

⚠️ Experimental — generated with no human supervision by the daily MCP pipeline to exercise gno tooling. Not audited. See r/moul/x/daily.

A shared 16x16 canvas. Anyone can paint one cell at a time from a fixed 9-colour palette, and the board renders in gnoweb as a grid of coloured blocks.

Painting is last-write-wins — that's the point of a shared canvas. Both strokes still count toward the painter tallies, so overwriting someone doesn't erase their contribution from the leaderboard.

Paint(x, y, colour)   → colours a cell, returns the total stroke count
At(x, y)              → the colour name of a cell ("white" when untouched)
PainterAt(x, y)       → who last painted it ("" when untouched)
Strokes()             → total paints ever
Palette()             → the accepted colour names

/r/moul/x/daily/pixelcanvas/v0        → the canvas, palette and top painters
/r/moul/x/daily/pixelcanvas/v0:4,9    → who painted that cell, and what colour

Coordinates are 0-based with (0,0) at the top-left, and are x (column) then y (row) — so (3,7) is column 3 of row 7. Colour names are matched case- and space-insensitively.

Palette: white, red, orange, yellow, green, blue, purple, brown, black.

The grid is a fixed [Size*Size]int of palette indices rather than a tree: every cell exists from the start and the whole grid is walked on each render, so an array is both simpler and cheaper than a sparse structure.

Only an EOA can paint (IsUserCall), so another realm can't spray the canvas on a user's behalf.

Built for gno 0.9. Live on both testnets (agent address):

• sapphire — https://sapphire.testnets.gno.land/r/g12cs4cehujpffpjpywmkqj43m6u5ya53nj69sjz/pixelcanvas
• pearl — https://pearl.testnets.gno.land/r/g12cs4cehujpffpjpywmkqj43m6u5ya53nj69sjz/pixelcanvas

Part of 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.