ChallengeValidationErrorInvalidMemoValue class

Validation error thrown when the challenge transaction's memo value does not match expected.

According to SEP-10, if a memo was provided when requesting the challenge, the challenge transaction's memo must match that exact value.

Memo matching requirements:

  • If memo was provided in challenge request: transaction must contain that exact memo value
  • If no memo was provided in request: transaction should have no memo (MEMO_NONE)
  • Memo values must match exactly (same unsigned 64-bit integer)

This validation ensures:

  • The challenge is bound to the specific sub-account or user identifier
  • Server correctly incorporated the requested memo
  • Challenge cannot be used for a different sub-account

Common scenarios requiring memos:

  • Exchange or custodial wallets using pooled accounts
  • Services that map multiple users to a single Stellar account
  • Systems using memos to identify individual users or accounts

Invalid memo value indicates:

  • Server returned a challenge with wrong memo
  • Challenge is for a different sub-account
  • Server processing error

Example handling:

int expectedMemo = 12345;
try {
  webAuth.validateChallenge(challenge, accountId, null, null, expectedMemo);
} on ChallengeValidationErrorInvalidMemoValue catch (e) {
  print('Challenge memo does not match expected value: $expectedMemo');
  // Request a new challenge with correct memo
}
Inheritance

Constructors

ChallengeValidationErrorInvalidMemoValue(String message)
Creates a ChallengeValidationErrorInvalidMemoValue with error message.

Properties

hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
Returns a string representation of this instance for debugging.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited