Bitcoin testnet4 · Spark REGTEST · no mainnet paths
Creative Bitcoin
👗 Fashion & Textile Design · trend prediction

TrendSignal Oracles II

Aggregate verified sales and social data on-chain to predict emerging fashion trends.

Privy Spark sign-in· bitcoin wallet UX
Section · Onchain

The primitive.

full primer →

Fashion designers sign in with Google through Privy — no seed phrase, no wallet extension — and Privy mints them a Spark (Bitcoin L2) wallet plus a Bitcoin testnet deposit address in one flow.

Why this primitiveA Privy Spark embedded wallet lets creators sign in with Google and receive a Bitcoin L2 address in one click — no seed phrase, no browser extension.

Kernel
Privy embedded wallet with chainType 'spark' — Google / email sign-in mints a Bitcoin testnet address plus a Spark (Bitcoin L2) address in one flow, no seed phrase, no extension
Drives the UI as
a one-click 'Sign in with Google' that drops the user into the app with a copy-able Spark address and a testnet BTC deposit address
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
$1.2B
fashion design software market
SAM
$120M
trend analytics platforms
SOM
$9M
designers leveraging real-time trend insights

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

See also

Adjacent entries.

trend prediction
TrendSignal Oracles
Aggregate verified sales and social data on-chain to predict emerging fashion trends.
material provenance
FabricTrace Ledger II
Track and verify organic fabric sources to assure sustainable fashion claims.
design copyright
DesignAuth Mint II
Securely register and timestamp original fashion designs to prevent copying.
color curation
ColorPalette DAO II
Collaboratively create and share color palettes with verified ownership and royalty rules.