Function crypto_secretstream_xchacha20poly1305_init_pull 

pub fn crypto_secretstream_xchacha20poly1305_init_pull(
    state: &mut State,
    header: &Header,
    key: &Key,
)

Initializes a pull stream for streaming decryption.

Initializes state using key and a header returned by crypto_secretstream_xchacha20poly1305_init_push.

Compatible with libsodium’s crypto_secretstream_xchacha20poly1305_init_pull.