The contract logic here is based on the deposit contract written in Vyper.

The original repository (https://github.com/ethereum/deposit_contract) had the following authors:

@NIC619
@carver
@hwwhww
@davesque
@ralexstokes
@ChihChengLiang
@nisdas
@djrtwo
@JustinDrake
@vbuterin
@njgheorghita
@CarlBeek

In eth2.0-specs repository (https://github.com/ethereum/eth2.0-specs), its current location, it had the following additional authors:

@daejunpark

And this repository has the following authors:

@axic
@MrChico
@chriseth

(All of the above are GitHub usernames in order of they appeared first in the commit history.)