Spurious Dragon (Ethereum)

Spurious Dragon was a critical hard fork executed on Ethereum in November 2016 that addressed security vulnerabilities and introduced important protocol improvements. Following the Tangerine Whistle fork, Spurious Dragon implemented replay attack protection through the addition of a chain ID parameter to transactions, preventing transactions intended for one chain from being replayed on another. The fork also introduced the REVERT opcode for more graceful error handling in smart contracts, refunded gas for certain operations, and increased costs for other operations deemed dangerous. These changes were essential for improving contract security and preventing various attack vectors that threatened the growing ecosystem. Example: After Spurious Dragon, the Ethereum and Ethereum Classic chains permanently diverged, with Spurious Dragon representing Ethereum's commitment to protocol security even at the cost of chain splits, while Ethereum Classic rejected the fork and maintained the original chain history. Why it matters for crypto history: Spurious Dragon demonstrated Ethereum's willingness to implement hard forks to address security concerns and improve the protocol. It established important precedents for governance and showed how blockchain communities could respond to threats while maintaining network integrity.

Category: crypto history

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