InvalidSequenceNumberException

Exception thrown when the challenge transaction has an invalid sequence number.

SEP-10 Security Requirement: The sequence number MUST be exactly 0.

This requirement prevents transaction replay attacks. A sequence number of 0 ensures the transaction can never be submitted to the Stellar network, as all real accounts have sequence numbers starting at 0 and incrementing with each operation.

Attack scenario prevented: If a challenge used a real sequence number, an attacker who intercepts the signed challenge could potentially submit it to the network, executing unintended operations on the user's account.

Parameters