Errors

Code	Name	What it means
6000	InvalidOracleSignature	Signature didn't verify
6001	Ed25519InstructionNotFound	Missing sig verification instruction
6002	RemainingBalanceBelowRentExempt	Would leave dust in account
6003	NothingToWithdraw	PDA is empty
6004	Unauthorized	Not the authority

Fixes

InvalidOracleSignature - Usually means the oracle key rotated or something's corrupted. Refresh and try again.

Ed25519InstructionNotFound - If you're building transactions manually, the Ed25519 verification instruction needs to come before the withdraw instruction.

RemainingBalanceBelowRentExempt - Either withdraw everything (amount = 0) or leave at least ~0.00089 SOL.

NothingToWithdraw - Check if there's money in the vault that needs collection first.