Auction mechanics need rules and price discovery. The money leg is the one that often shouldn't be public. This page shows what the app exposes, what it hides, and how MagicBlock's ephemeral rollup balances make that possible without re-implementing every plumbing piece.
Public auctions and routine on-chain transfers leak strategy:who bid, how much,when, and after a clear, who paid whom looks obvious in the public graph.
Auction logic stays in the client for fast, resettable demos (commit-reveal, price ticks, sessions in localStorage). The settlement path is real:
POST /v1/spl/deposit funds anephemeral rollup USDC balance on devnet.POST /v1/spl/transfer with visibility: "private" pays the seller from that balance.Visualised end-to-end. Click any auction page after this to see the real request bodies in the guided panel.
Buyer signs deposit
Devnet SOL + USDC required
Ephemeral USDC
fromBalance: ephemeral
Commit-reveal or Dutch ticks
Browser, fast resets
POST /v1/spl/transfer
visibility: "private"
MagicBlock pairs an ephemeral rollup model with a hosted payments surface so we can move USDC in flows designed for private settlement without re-implementing every plumbing piece.
ER-facing balance
Buyers fund a rollup USDC position the API spends from. The private leg is not a single obvious public SPL hop.
Stable HTTP surface
/v1/spl/* for health, deposit, and transfer with hosted error semantics — fewer custom programs for a hackathon timeline.
Devnet first
Real Solana cluster, real wallet, real explorer entries — the same flow demo viewers can reproduce in minutes.
Product: magicblock.app · payments API reference