erigon-lib
Parts of Erigon codebase, written from scratch and licensed under Apache 2.0.
License requirements
erigon-lib dependencies use various open source licenses compatible with Apache 2.0. This is checked on CI using make lint-licenses.
In order to keep license purity it is not allowed to refer to the code in the erigon root module from erigon-lib. This is ensured by the go.mod separation.
It is not allowed to copy or move code from erigon to erigon-lib unless all original authors agree to relief the code license from GPL to Apache 2.0.
Code migration policy
It is encouraged to write new erigon code inside erigon-lib.
It is encouraged to move and relicense parts of the code from erigon to erigon-lib that are safe and easy to move. For example, code written from scratch by erigon core contributors that has no significant external contributions could be refactored and moved.