Fig. 03 · Mainnet topology: Tempo to Base through Across, then partners on Base and Solana, and NEAR Intents into Zcash.
Tempo
Settlement hub. pathUSD balances, TIP-20 memos as indexed topics, gas in stablecoins, 0.6 s finality.
Across
Bridge. Tempo ⇄ Base ⇄ Solana through the Swap API, seconds per hop, fractions of a cent.
Base
Bridge midpoint. Every hub ⇄ Solana movement passes through Base, and NEAR Intents swaps into Zcash from Base USDC.
Solana
Ramp liquidity. USDC with an SPL Memo in one transaction; the pattern ramps already read.
Zcash
Shielded lane. Ironwood batches, encrypted invoice memos, viewing keys scoped to a customer and period.
NEAR Intents
Shielded funding. USDC → ZEC delivered straight to a vault’s unified address.
FROST
Threshold control. 2-of-3 RedPallas signing over Ironwood spends.
Paj
Ramp partner. NGN offramp and onramp against USDC on Solana.
Partner interface
Become a spoke. Six methods and a signed webhook.