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Byzantium
LiveREVERT, zk-SNARK precompiles, and PoS groundwork.
Activated 2017-10-16Block 4,370,000
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About Byzantium
Byzantium was a major Metropolis phase upgrade introducing the REVERT opcode for safer contract development, zk-SNARK precompiles for privacy technologies, and a block reward reduction moving the network toward Proof-of-Stake.
Core EIPs Included
8EIPs that are part of the activated upgrade on mainnet.
Embedding transaction status code in receipts
Skinny CREATE2
EXTCODEHASH opcode
Reduce alt_bn128 precompile gas costs
Constantinople Difficulty Bomb Delay and Block Reward Adjustment
ChainID opcode
Repricing for trie-size-dependent opcodes
Transaction data gas cost reduction
Other EIPs
1Networking, Meta, Informational, and ERC standards associated with this upgrade.
Hardfork Meta - Byzantium
EIP Composition Timeline
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INCLUDED
SFI
CFI
PFI
DFI
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