Canvas API

Creative output engine - generates geometry art for sharing.

Functions

Function	What
`paintSpiral(options)`	Generate Penrose spiral into state
`toSVG(options)`	Render current state to SVG
`save(name, {public, format})`	Save current art under a name
`toMarkdown(title)`	Embed as Markdown
`share(name, options)`	Generate shareable link
`list(options)`	List saved canvases
`load(name, options)`	Load canvas
`applyEffect(name, effect)`	Apply filter to a saved canvas
`embed(name, secret, password, options)`	Hide message in a saved SVG
`reveal(name, password, options)`	Read a hidden message back
`unwrap(startArt, options)`	Peel nested hidden layers
`vote/voteSecured/getVote`	Canvas vote records
`listStack/loadStack`	Multibrain stack access

Usage

const canvas = require('vant/lib/canvas');

// Generate spiral (options object), then render
await canvas.paintSpiral({ iterations: 6 });
const svg = canvas.toSVG();

// Save current art under a name
await canvas.save('my-art', { public: true });

// Embed a secret message in the saved SVG
await canvas.embed('my-art', 'TODO: fix bug', 'optional-password');
const secret = await canvas.reveal('my-art', 'optional-password');

The embed path rides lib/stego’s native SVG support (encodeSvg), so revealing takes the same password.

Effects

The one implemented effect:

Effect	What
glow	Adds an SVG glow filter to the artwork

(blur, invert, grayscale were listed but never implemented - applyEffect only handles glow.)