-void blank_round(twister_state_t* ctx);
-void mini_round(twister_state_t* ctx, void* msg);
+typedef uint8_t twister_checksum_t[8][8];
+
+void twister_blank_round(twister_state_t* ctx);
+void twister_mini_round(twister_state_t* ctx, const void* msg);
+void twister_ctx2hash(void* dest, twister_state_t* ctx, uint16_t hashsize_b);