Bitcoin testnet4 · Spark REGTEST · no mainnet paths
Creative Bitcoin
🎨 Visual Art · virtual exhibition records

Exhibit Echo II

Preserve virtual gallery exhibits with creator-owned NFT provenance linked to IPFS.

Spark sats paywall· instant sats payments
Section · Onchain

The primitive.

full primer →

Painters pay a few sats over Spark (Bitcoin L2) via a single Privy-signed transfer to unlock the virtual exhibition records; settlement is instant and the merchant confirms via getBalance.

Why this primitiveA Spark sats transfer settles in under a second and is Bitcoin-native — perfect for gating this content behind a one-click, low-friction micropayment.

Kernel
a 'pay N sats on Spark to unlock' gate — the user signs a Spark transfer via Privy, the merchant's wallet observes the transfer via Spark's getBalance/getTransfers, and the endpoint releases the payload
Drives the UI as
a 'pay 100 sats to unlock' button that returns the Spark tx id, the merchant confirmation, and settles instantly
Appendix · Secrets

Required keys.

PRIVY_APP_ID
Privy dashboard → your app. Configure with chainType 'spark' to mint Bitcoin L2 wallets on sign-in.
open ↗
PRIVY_APP_SECRET
Server-side. Required for the merchant Spark wallet to observe incoming sats transfers via the Privy RPC.
open ↗
PINATA_JWT
Pins images / JSON / manifests to IPFS.
open ↗

Add these in your Lovable project under Settings → Secrets before pasting the prompt below.

Appendix · Mega-prompt

The build prompt.

Paste into a fresh Lovable project — it carries its own feature spec, code, setup and checklist. read the build strategy →

loading the build spec…
Open in Lovable ↗mempool.space testnet4 ↗
Appendix · Market

Market sizing.

TAM
$65B
global visual art market
SAM
$1B
virtual exhibition revenues
SOM
$12M
NFT exhibit provenance buyers

Indicative figures for hackathon pitches — refine with your own research before raising.

See also

Adjacent entries.

virtual exhibition records
Exhibit Echo
Preserve virtual gallery exhibits with creator-owned NFT provenance linked to IPFS.
illustrator community
Illustrator Guild II
Create a hosted network for illustrators to share, sell, and verify work with easy login and zero gas fees.
generative art
Generative Canvas II
Let generative artists deploy and monetize code-driven art with instant gasless onboarding and transactions.
art provenance tracking
Gallery Ledger II
Provide gallerists with gasless, onchain tools to prove artwork provenance and authenticity effortlessly.