Multi-chain Development Without the Complexity
Supporting four networks should be a configuration change, not a rewrite. The teams that suffer treat each chain as a separate backend; the teams that ship treat chain differences as data.
The abstraction starts with a chain registry: per-network RPC endpoints, confirmation thresholds, gas strategies, address formats and explorer links in one typed config. Vaultline runs Ethereum, Polygon, Base and Solana through this single registry — adding a network means adding a record, reviewed like any other change.
Confirmations are the subtlest difference. Twelve blocks on Ethereum and thirty-two slots on Solana mean different things for UX; normalize them into product-level states — submitted, detected, safe — and let each chain's adapter define the mapping. Your frontend should never count blocks.
Gas abstraction follows the same pattern. EIP-1559 chains, fixed-price chains and Solana's fee model all reduce to "estimate, present, sponsor-or-user-pays." RelayZero's gasless relayer sits behind that interface, so partner apps enable sponsored transactions without touching chain-specific code.
Test the matrix, not just the chain. Our CI runs the contract suite against forked state for every supported network on every change — the failures it catches are always the ones you'd find at 2am on mainnet otherwise.
Going multi-chain?
We'll design the abstraction layer first — it's the cheapest insurance.