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Nicolás Venturo f7ff3e7e67 Disallow ERC20._transfer from the zero address. (#1752) ... * Add requirement of non-zero from to ERC20 transfer. * Add test for transferFrom zero address to behavior. * Create ERC20.transfer behavior. * Add tests for _transfer. * Add changelog entry. * Fix linter error. * Delete repeated test. * Fix hardcoded error prefix. * Update CHANGELOG.md Co-Authored-By: Francisco Giordano <frangio.1@gmail.com> * Address review comments. (cherry picked from commit ad18098d65)		6 years ago
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access	Added message string for require() (#1704)	6 years ago
behaviors/access/roles	Added message string for require() (#1704)	6 years ago
crowdsale	Added message string for require() (#1704)	6 years ago
cryptography	Added message string for require() (#1704)	6 years ago
drafts	Add ERC20 compatibility to ERC777. (#1735)	6 years ago
examples	Added message string for require() (#1704)	6 years ago
helpers	Signature Malleability: (#1622)	6 years ago
introspection	Added message string for require() (#1704)	6 years ago
lifecycle	Added message string for require() (#1704)	6 years ago
math	Added message string for require() (#1704)	6 years ago
ownership	Added message string for require() (#1704)	6 years ago
payment	Added message string for require() (#1704)	6 years ago
token	Disallow ERC20._transfer from the zero address. (#1752)	6 years ago
utils	Added message string for require() (#1704)	6 years ago
TESTING.md	Improve README (#1309)	6 years ago