🎮 Game Design & Interactive Media · character customization

Kromos · x402

A stateless character-smith where every aesthetic choice—from skin shader to gear mesh—is a 0.01 USDC unlock triggered via signature. Instead of buying a whole NFT, players 'stream' their identity by paying for the specific frame-data and rig-assets they use per session. Developers earn real-time royalties every time a player equips their designed layer, turning character customization into a high-frequency micro-transaction loop.

Hedera testnet + x402 paywall· x402 native
Section · Onchain

The primitive.

full primer →

Access to the character customization engine is metered with x402: 0.01 HBAR or 0.01 HTS USDC per call, paid from the embedded wallet, so game designers — or the agents working for them — pay per query and get a HashScan receipt every time.

Why this primitiveBypasses the 'lumpy' cost of minting full NFTs by decoupling the asset from the token. Using x402 allows for granular 'pay-per-equip' or 'pay-per-render' models, making high-quality community-made assets accessible for pennies while ensuring creators are paid instantly for every usage instance.

Kernel
an x402 v2 paywall metering access at 0.01 HBAR or 0.01 HTS USDC (token 0.0.429274) per call, paid from the embedded wallet through the relay and verified by a self-hosted facilitator against the Hedera mirror node
Drives the UI as
a 'pay 0.01 HBAR or USDC to unlock' button with a live flow log and a HashScan link for every settlement
Appendix · Secrets

Required keys.

HEDERA_OPERATOR_ID
Hedera testnet account id (0.0.xxxxxx). Create and fund it free.
open ↗
HEDERA_OPERATOR_KEY
ECDSA private key for that account, from the Hedera portal dashboard.
open ↗
REOWN_PROJECT_ID
Free project id powering the HashPack pairing modal.
open ↗
HEDERA_RPC_URL
Optional. JSON-RPC relay, defaults to the public Hashio endpoint.
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. Make sure all five secrets above are set first. read the build strategy →

Loading the mega-prompt…
Appendix · Market

Market sizing.

TAM
$75B
Global market for digital fashion and virtual world avatar customization.
SAM
$1.2B
In-game skin and cosmetic micro-transaction volume on Layer 2 networks.
SOM
$15M
Independant game devs on Hedera integrating modular, pay-per-use character libraries.

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

See also

Adjacent entries.