My Anchor program is giving me a Transaction simulation failed: Error processing Instruction 1: custom program error: 0xa7 with nothing useful in the logs.
How do I even begin to debug this?
Custom Program Error 0xa7 is Error: 167: The given account is not owned by the executing program.
This might happen if you pass in an account that's expected to be owned by a program, but isn't.
This can happen accidentally if you forget to set declare_id!(/* ... */) to the program id you're trying to hit.
Consider logging the program id that you're using in your javascript client:
console.log(program.programId)
And then seeing if that matches the public key that's in your target/idl/yourprogram.json file.