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Dev.to
7/16/2026
Rootstock RPC: An EVM Chain Where Gas Is Bitcoin

Rootstock RPC: An EVM Chain Where Gas Is Bitcoin

Short summary

A developer guide to Rootstock (RSK), an EVM-compatible Bitcoin sidechain where gas is paid in RBTC pegged 1:1 to BTC. The article covers two key integration pitfalls: gas pricing uses a legacy model denominated in Bitcoin rather than EIP-1559, and addresses use EIP-1191 checksums incorporating chain ID 30 instead of Ethereum's EIP-55. Beyond these differences, standard EVM tooling works as-is.

  • •Rootstock is an EVM sidechain (chain ID 30) secured by Bitcoin merge-mining with RBTC as gas
  • •Gas uses legacy pricing in Bitcoin, not EIP-1559 — avoid hard-coded gwei assumptions
  • •Addresses use EIP-1191 checksums with chain ID; normalize to lowercase for cross-chain compatibility

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