Bitcoin testnet4 · Spark REGTEST · no mainnet paths
Creative Bitcoin
✍️ Writing, Poetry & Narrative · interactive storytelling

Narrative Nexus II

Mint branching story nodes as NFTs to ensure unique creator control and provenance.

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 interactive storytelling; 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 globally
SAM
$200M
interactive narrative software users
SOM
$25M
NFT-based story branching creators

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

See also

Adjacent entries.

interactive storytelling
NarrativeVote
Enable readers to vote on story plot directions through blockchain-based decision contracts.
interactive storytelling
Narrative Flow Sync
Save and share branching story manifests guaranteeing permanent access and collaboration.
interactive storytelling
Narrative Nexus
Mint branching story nodes as NFTs to ensure unique creator control and provenance.
interactive storytelling
NarrativeVote II
Enable readers to vote on story plot directions through blockchain-based decision contracts.