How Old Is 'finalized'? We Measured 62 Chainseth_getBlockByNumber("finalized") looks like a universal answer to "is this transaction safe to act on?" Wait until the transaction's block is at or below finalized, then credit the deposit. The metho1ISep 30 · 8 min readswiftnodes.hashnode.dev
opBNB RPC: A Developer's Guide (Chain ID 204)opBNB is BNB Chain's layer 2. It runs the OP Stack, the same software as Optimism and Base, with one structural difference: its layer 1 is BNB Smart Chain, not Ethereum. That one change explains most Sep 29 · 6 min readswiftnodes.hashnode.dev
Shibarium RPC: A Developer's Guide (Chain ID 109)Shibarium is the Shiba Inu ecosystem's own chain, live since August 2023. If you have built on Polygon PoS, you already know most of it: Shibarium runs the same two-layer design, with Bor producing blSep 28 · 6 min readswiftnodes.hashnode.dev
Katana RPC: A Developer's Guide to the DeFi-First L2Katana looks like every other OP Stack chain from the RPC side: the same eth_* methods, the same predeploys at 0x4200…, the same L1 fee fields on receipts. Two things underneath are different, and botSep 27 · 6 min readswiftnodes.hashnode.dev
Kusama RPC: A Developer's Guide After the Asset Hub MoveMost Kusama RPC tutorials were written for a chain that no longer exists in the same shape. Until October 2025, the Kusama relay chain was where balances lived, where you bonded and nominated, and wheSep 26 · 7 min readswiftnodes.hashnode.dev
