feat: contract identicons + SIP draft - #5
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Add a deterministic visual identifier for deployed Clarity contracts
so users can recognize known code at a glance across wallets,
explorers, and apps.
Pipeline:
fetch source from /v2/contracts/source
-> sha512/256 over utf-8 bytes
-> lowercase hex hash as seed
-> minidenticonSvg (5x5 symmetric grid)
Draft SIP at sips/sip-xxx-contract-identicons.md pins the canonical
form (output of `clarinet fmt`), hash function, and renderer so the
same source produces the same icon everywhere.
Reference implementation:
- src/utils/contractIdenticon.ts — fetch/hash/render pipeline
- src/components/ContractIdenticon.tsx — async SVG component
- wired into src/components/wallet-selector/WalletCard.tsx,
replacing the generic Wallet lucide icon with the per-contract
identicon
Adds minidenticons, re-adds @noble/hashes@2 as a direct dep (sha2
subpath wasn't available transitively from the 1.x that Stacks libs
pull in).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Stacked on #4. Contract identicons to build user trust: wallets and explorers that implement this spec show the same icon for the same contract source, making known code recognizable at a glance.
SIP draft
sips/sip-xxx-contract-identicons.md— full specification. Pins:clarinet fmt(default settings).sha512/256so a contract can self-declare its hash on-chain).minidenticonswith default options, seeded with lowercase hex.Includes sections on canonicalization assumptions in browser contexts, related work (blockies / jdenticon / sourcify), backwards compatibility (none — off-chain convention), and the optional on-chain self-declaration pattern.
Forum discussion: https://forum.stacks.org/t/identicon-for-contracts/18637
Reference implementation
src/utils/contractIdenticon.ts: fetch/v2/contracts/source/{addr}/{name}→sha512_256from@noble/hashes/sha2→minidenticonSvg.src/components/ContractIdenticon.tsx: async SVG component with loading fallback + a11y label.WalletCard.tsx, replacing the genericWalletlucide icon with the per-contract identicon.Deps
minidenticons(~3 KB).@noble/hashes@^2as a direct dep — thesha2subpath isn't available via the 1.x version Stacks libs pull in transitively.Test plan
pnpm run buildpnpm run devboots🤖 Generated with Claude Code