Posts tagged #polkadot

2 posts.

August 4, 2026 · 5 min read

Polkadot RPC: JSON-RPC, but a Whole Different Ecosystem From Ethereum

Polkadot's RPC is JSON-RPC over HTTP — but it's the Substrate namespace (system_*, chain_*, state_*), not eth_*, so viem/ethers don't connect. The relay chain runs no smart contracts, DOT has 10 decimals (not 18), and storage is SCALE-encoded, not ABI. Here's the developer map for querying Polkadot (and Kusama / Asset Hub) over Substrate RPC.

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July 25, 2026 · 4 min read

Astar RPC: One Chain, Two VMs, Polkadot Security

Astar is a Polkadot parachain that runs both EVM and WebAssembly contracts. Chain ID 592 is its EVM endpoint — standard eth_*, so viem/ethers/foundry just work — but underneath it's Substrate with Polkadot's deterministic GRANDPA finality. Here's the developer map: what the EVM RPC gives you, and what the parachain model changes.

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