Bitcoin testnet4 · Spark REGTEST · no mainnet paths
Creative Bitcoin
✍️ Writing, Poetry & Narrative · classic poetry

Sonnet Seal II

Mint sonnets as NFTs to certify original poetic works and preserve ownership rights.

Spark sats paywall· instant sats payments
Section · Onchain

The primitive.

full primer →

Writers pay a few sats over Spark (Bitcoin L2) via a single Privy-signed transfer to unlock the classic poetry; 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
$1.5B
writing tools market
SAM
$85M
classic poetry digital tools
SOM
$8.5M
NFT sonnet minting creators

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

See also

Adjacent entries.

classic poetry
Sonnet Seal
Mint sonnets as NFTs to certify original poetic works and preserve ownership rights.
poetry drafting
VerseVault II
Securely draft and store poems with seamless gasless transaction experience.
interactive narrative
StoryStake II
Engage writers in creating branching stories with frictionless onchain ownership of choices.
screenwriting collaboration
ScriptSponsor II
Collaborate on scripts with transparent, gasless edits tracked via embedded wallets.