Sealed Vault
Contract sealed_vault. Extends Contract with:
.vault
Section titled “.vault”The sealed vault passage system. Position resets to (0, 0) at the start of each contract script run; the maze layout stays fixed.
Returns: Vault
.move(direction)
Section titled “.move(direction)”Step one cell: "north", "south", "east", or "west".
Returns: ActionResult · Outcomes: "path" (entered an ordinary cell) / "wall" (blocked, position unchanged) / "exit" (entered the exit cell) · Raises: TypeError / ValueError
.position
Section titled “.position”Current cell as a VaultPosition (.row, .col, iterable for unpacking). Read again after move() for the new cell.
Returns: VaultPosition
.escape()
Section titled “.escape()”Open the vault from its exit cell.
Returns: VaultEscapeResult (payload .key) · Outcomes: "ok" / "not_at_exit"
Side length of the square maze: start (0, 0), exit (size - 1, size - 1).
Returns: number
Approach: a wall-following or backtracking search reaches the exit; transmit the key from escape().