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Francisco Giordano 84e63bbf8b Fix decrease allowance and add non-zero address precondition to approve (#1293) ... * rename {increase,decrease}Approval to {increase,decrease}Allowance * add non-zero spender check to approve and {increase,decrease}Allowance * Updated tests to reflect the new behavior. * fix wrong test description * fix old function names * Fixed linter error. * Fixed typo.		6 years ago
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ERC20	Fix decrease allowance and add non-zero address precondition to approve (#1293)	6 years ago
ERC721	remove unnecessary internal constant (#1297)	6 years ago