Series of block headers from the last 81 blocks that acts as random seed material. This is arranged as a ring buffer with block_number % 81 being the index into the Vec of the oldest hash.
block_number % 81
Vec
Series of block headers from the last 81 blocks that acts as random seed material. This is arranged as a ring buffer with
block_number % 81being the index into theVecof the oldest hash.