unclear function selector in call to purity checker

[ralexstokes]

casper/casper/contracts/simple_casper.v.py

Line 298 in b2a1189

assert extract32(raw_call(self.PURITY_CHECKER, concat('\xa1\x90>\xab', convert(validation_addr, 'bytes32')), gas=500000, outsize=32), 0) != convert(0, 'bytes32')

Looks like a typo...

The raw_call presumably calls the submit function here: https://github.com/ethereum/research/blob/master/impurity/check_for_impurity.se

And following our convention we see:

> web3.sha3("submit(address)")
"0xa1903eab65b303e5d2b0f7ffc455cbdb5d081456ef23967ae426c2cada7ffffd"

which implies the method selector should be '\xa1\x90\x3e\xab'.

If someone can confirm I'll submit a PR.

[djrtwo]

"\x3e" == ">"

I agree that it would be cleaner with the explicit hex if you still want to do that PR

[djrtwo]

addressed in #97