proc variantToBase64(variant: Variant): string {.
gcsafe, locks: 0, raises: [Exception],
    tags: [RootEffect]
.}

proc base64ToVariant(base64Str: string): Variant {.
gcsafe, locks: 0,
    raises: [Exception], tags: [RootEffect]
.}

proc rawToBase64(array: PoolByteArray): string {.
gcsafe, locks: 0, raises: [Exception],
    tags: [RootEffect]
.}

proc base64ToRaw(base64Str: string): PoolByteArray {.
gcsafe, locks: 0,
    raises: [Exception], tags: [RootEffect]
.}

proc utf8ToBase64(utf8Str: string): string {.
gcsafe, locks: 0, raises: [Exception],
    tags: [RootEffect]
.}

proc base64ToUtf8(base64Str: string): string {.
gcsafe, locks: 0, raises: [Exception],
    tags: [RootEffect]
.}