Message
Could not determine this transaction's signature. Make sure that the transaction has been signed by its fee payer.
What it means
Assembling, compiling, signing and size-checking transaction messages.
What to do
- Set a fee payer and a lifetime (blockhash or durable nonce) before compiling.
- Keep the serialised transaction at or under 1,232 bytes; use address lookup tables for large transactions.
- A durable-nonce transaction must have
AdvanceNonceAccountas its first instruction.