Ethereum Contract Size Limit Explained by Vitalik: 82KB Cap, DoS Risks, and EIP-7864’s Path to Unlimited Size

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COINOTAG News reported on December 23 that Ethereum founder Vitalik Buterin addressed the community’s question, “Why does Ethereum still set a contract size limit?” He tied the ceiling to DoS risk considerations and security hardening amid ongoing protocol design discussions.

The path forward under EIP-7864 envisions migrating the state structure to a unified binary tree, with the expectation of enabling unlimited contract size. However, practical deployment hinges on the gas fees model and the mechanics of deploying very large contracts. At present, the cost is calculated per byte, yielding an observed upper bound of roughly 82KB.

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