Feedback on design

[generalpiston]

• [x] I would suggest you to avoid forcing users to extend EncryptedBaseEntity class if possible. Usually users don't like to extend third party classes or change their model inheritance tree. (just imagine if there is another libs who force to extend their entities too and user uses them all)
• [ ] @EncryptedColumn looks fine, its not a valid from typeorm point of view because this decorator is not creating a new column (like all Column decorators in typeorm), it just makes it encrypted. I would name it simply @Encrypted instead.
• [x] Also, its no a suggestion, just a hint most users don't know. You can override ColumnOptions properties and do it alternatively this way (it will be type-safe):

  @Column({
  type: "varchar",
  nullable: false,
  encrypt: {
      key: "d85117047fd06d3afa79b6e44ee3a52eb426fc24c3a2e3667732e8da0342b4da",
      algorithm: "aes-256-cbc",
      ivLength: 16
  }
  })

[generalpiston]

Opting for extending ColumnOptions instead of having an @Encrypted annotation.