Upgrading program without keypair

Question

Is it possible to upgrade a program using anchor deploy without having it's program keypair but being the program upgrade authority?

Answer 1

Yes, all upgrades can be done with only the program's public key and only the initial deployment requires the program's keypair.

Use solana program deploy --program-id <PROGRAM_ID> <PROGRAM_PATH> to upgrade your program without its keypair.

Note that <PROGRAM_PATH> is the path to the generated /target/deploy/<PROGRAM_NAME>.so file.