EVM Version Information
You are asked to provide the EVM version the contract uses during the verification process. If the bytecode does not match the version, we try to verify using the latest EVM version (currently London).
For more information, see the Solidity docs on specifying the EVM version when compiling a contract. Note that backward compatibility is not guaranteed between each version.
Name
Date
Mainnet Block #
Relevant changes / opcode specs
EIP details
Homestead
14 Mar 2016
1,150,000
Oldest version
Tangerine Whistle
18 Oct 2016
2,463,000
Gas cost to access other accounts increased, impacts gas estimation and optimization. All gas sent by default for external calls, previously a certain amount had to be retained.
Spurious Dragon
22 Nov 2016
2,675,000
Gas cost for the exp opcode increased, impacts gas estimation and optimization.
Byzantium
16 Oct 2017
4,370,000
Opcodes returndatacopy, returndatasize and staticcall available in assembly. staticcall opcode used when calling non-library view or pure functions, which prevents the functions from modifying state at the EVM level, this even applies to invalid type conversions. Ability to access dynamic data returned from function calls. revert opcode introduced, revert() will not waste gas.
Constantinople / Petersburg
28 Feb 2019
7,280,000
Opcodes create2, extcodehash, shl, shr and sar are available in assembly. Bitwise shifting operators use shifting opcodes (shl,shr,sar), requiring less gas.
Istanbul
08 Dec 2019
9,069,000
Opcodes chainid and selfbalance are available in assembly.
Berlin
14 Apr 2021
12,244,000
Gas costs for SLOAD, *CALL, BALANCE, EXT* and SELFDESTRUCT increased. The compiler assumes cold gas costs for such operations. This is relevant for gas estimation and the optimizer.
London
05 Aug 2021
​12,965,000​
The block’s base fee (EIP-3198 and EIP-1559) can be accessed via the global block.basefee or basefee() in inline assembly.
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Arrow Glacier*
09 Aug 2021
13,773,000​
Delays the difficulty bomb until June 2022.
Gray Glacier*
30 June 2022
15,050,000​
Delays the difficulty bomb by an additional 3 months to September 2022.
*Does not impact version for contract verification.

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