In NEAR, there are two smart contracts created in genesis: near and register smart contracts. These contracts handle account IDs, but I can't seem to locate their source code. Could someone please point me to the relevant code on GitHub?
registrar account does not have any contract deployed to it, it is still controlled by a full access key controlled by NEAR Foundation: https://explorer.near.org/accounts/registrar
near account uses near-linkdrop contract.