@ledgerhq/coin-stellar/src/logic/validateMemo.ts

Ledger Stellar Coin integration

// SPDX-FileCopyrightText: © 2026 LEDGER SAS
// SPDX-License-Identifier: Apache-2.0

import BigNumber from 'bignumber.js'
import { StellarMemoKind } from '../types/model'

export const MEMO_TEXT_MAXIMUM_SIZE = 28
export const MEMO_HASH_FIXED_SIZE = 64

export function validateMemo(memo: string, type: StellarMemoKind): boolean {
  switch (type) {
    case 'NO_MEMO':
      return !memo || memo.length === 0
    case 'MEMO_TEXT':
      return memo.length <= MEMO_TEXT_MAXIMUM_SIZE
    case 'MEMO_ID':
      return !new BigNumber(memo.toString()).isNaN()
    case 'MEMO_HASH':
    case 'MEMO_RETURN':
      return memo.length === 64
  }
}