Although interesting, have to also agree with others that this is bad idea regarding to potentially considered abuse to good-will run servers. >Here sha3_256 i

Although interesting, have to also agree with others that this is bad idea regarding to potentially considered abuse to good-will run servers. >Here sha3_256 is used again but this time inside hash160. The reason for this is stacking hash functions can help reduce the chances of finding collisions (you would need to find a collision in both functions.) Don't you only need to find collision in the outer hash function?