Constantinople Era
Second Metropolis hard fork. Added CREATE2, bitwise shifting opcodes, and cheaper SSTORE.
2019-02-28 to 2019-12-08
Blocks 7,280,000 to 9,068,999
4 documented contracts
WrappedCK
A fungible ERC-20 index of interchangeable CryptoKitties, not an NFT wrapper. One WCK is a claim on an arbitrary basic kitty, never a particular one.
0x09fe5f...128075May 31, 2019Feisty Doge NFT
Fractional ownership of Feisty Doge: a second Kabosu frame from the same 2010 walk, held in a vault and split into roughly 100 billion ERC20 claims.
0xdfdb7f...635346August 19, 2021WrappedMistCoin
A 2022 wrapper for MistCoin, the November 2015 token that preceded and inspired ERC-20.
0x7fd4d7...ae0a79July 27, 2022Wrapped Unicorn Meat
tokenA modern ERC-20 wrapper for the original 2016 Unicorn Meat token, created by Alex Van de Sande of the Ethereum Foundation. Fixed supply of 100M after contract o
0xdfa208...80e668July 15, 2025