Commit Graph

564 Commits

Author SHA1 Message Date
5dfe7215a9 Migrate Contracts to Solidity v0.6 (#2080)
* Initial migration to Solidity 0.6.x - v3.0 first steps (#2063)

* Initial migration, missing GSN, 721, 777 and Crowdsales.

* Add _beforeTokenOperation and _afterTokenOperation.

* Add documentation for hooks.

* Add hooks doc

* Add missing drafts

* Add back ERC721 with hooks

* Bring back ERC777

* Notes on hooks

* Bring back GSN

* Make functions virtual

* Make GSN overrides explicit

* Fix ERC20Pausable tests

* Remove virtual from some view functions

* Update linter

* Delete examples

* Remove unnecessary virtual

* Remove roles from Pausable

* Remove roles

* Remove users of roles

* Adapt ERC20 tests

* Fix ERC721 tests

* Add all ERC721 hooks

* Add ERC777 hooks

* Fix remaining tests

* Bump compiler version

* Move 721BurnableMock into mocks directory

* Remove _before hooks

* Fix tests

* Upgrade linter

* Put modifiers last

* Remove _beforeTokenApproval and _beforeOperatorApproval hooks
2020-02-14 11:12:32 -03:00
1b938e39a8 EnumerableSet improvements (#2077)
* Remove newAddressSet

* Add count and get functions.

* Fix lint

(cherry picked from commit 7988c044e0)
2020-02-04 19:33:57 -03:00
7988c044e0 EnumerableSet improvements (#2077)
* Remove newAddressSet

* Add count and get functions.

* Fix lint
2020-02-04 19:15:32 -03:00
1e0f07751e Implementation of an address Enumerable Set (#2061)
* Drafted Enumerable.sol.

* Drafted test framework.

* Tweaked the tests to follow oz structure.

* Coded EnumerableSet.

* Moved EnumerableSet to `utils`.

* Fixed linting.

* Improved comments.

* Tweaked contract description.

* Renamed struct to AddressSet.

* Relaxed version pragma to 0.5.0

* Removed events.

* Revert on useless operations.

* Small comment.

* Created AddressSet factory method.

* Failed transactions return false.

* Transactions now return false on failure.

* Remove comments from mock

* Rename mock functions

* Adapt tests to code style, use test-helpers

* Fix bug in remove, improve tests.

* Add changelog entry

* Add entry on Utils doc

* Add optimization for removal of last slot

* Update docs

* Fix headings of utilities documentation

Co-authored-by: Nicolás Venturo <nicolas.venturo@gmail.com>
2020-01-24 14:50:24 -03:00
7d7cbcad14 Fix/improve revert reason #1727 (#2018)
* adding mock contacts, test code

* adding changes to ERC721.sol per @frangio's comments on original PR #1943

* fix solhint warnings

* Update contracts/token/ERC721/ERC721.sol

Co-Authored-By: Francisco Giordano <frangio.1@gmail.com>

* same revert wording per @frangio's review suggestion

* per @frangio's feedback, changing the inline assembly to accomplish: we want to ignore the first 4 bytes of content, so we should read the length and decrease it by 4, then take the memory location and add 4 to it, then store the new length at the new memory location, then that is the new byte array that we want.

* change revert msg assembly per PR comment by @frangio

* unify revert msg in test code

* fix some failed tests, wording change

* Update contracts/token/ERC721/ERC721.sol

Co-Authored-By: Francisco Giordano <frangio.1@gmail.com>

* Update contracts/token/ERC721/ERC721.sol

Co-Authored-By: Francisco Giordano <frangio.1@gmail.com>

* fix test case, revert without reason

* fix 'ERC721ReceiverRevertsMock: Transaction rejected by receiver'

* style change per review by @frangio

* fix revert reason forwarding

* remove duplicate contracts/mocks/ERC721ReceiverRevertsMock.sol per review https://github.com/OpenZeppelin/openzeppelin-contracts/pull/2018\#issuecomment-574381034

* Add changelog entry

* Fix tests

* Make tests more clear

Co-authored-by: Francisco Giordano <frangio.1@gmail.com>
Co-authored-by: Nicolás Venturo <nicolas.venturo@gmail.com>
2020-01-23 16:33:09 -03:00
8c40a5b275 Create2 feature pending tasks (#2013)
* Add Create2 library (#1744)

* feat(contracts): Add Create2 library to use create2 evm opcode

* Upgrade sol-coverage

* Add changelog entry

* Update comments and code style

* Remove create2 helper

* Fix linter error

* Fix truffle dependency

* Fix linter error

* refactor(Create2): Remove _deploy internal function

* test(Create2): test Create2 with inline assembly code

* fix(Create2): Check address returned form create2 instead of codesize of created contract

* refactor(Create2):Add revert reason when Create2 deploy fails (#2062)

* fix merge with master

* fix test

Co-authored-by: Augusto Lemble <me@augustol.com>
2020-01-23 15:08:54 -03:00
5f92adc2e7 Migrate from truffle to test-environment (#2007)
* Sketch

* Migrate all tests to test-env

* Finish migration to test-env

* Add config

* Work on GSN tests

* Migrate to newer test-env version and loader syntax

* Add GSN setup

* Finish test-env migration

* Setup coverage using test-env

* Migrate to npm package

* Fix package.json

* Add compile step to CI

* Add comment on coverage setup

* Remove dependency on @truffle/contract

* Fix package-lock merge

* Fix linter errors

* Upgrade test-environment, depend locally on ganche-coverage

* Improve coverage script

* Improve sign.js API

* Move accounts destructuring to describe block

* Switch to prebuilt ethereumjs-vm package

* Upgrade test-enviroment version

* use workspace in circleci config

* remove unnecessary npx
2019-11-28 15:46:42 -03:00
28b95ef5be ReentrancyGuard gas optimization (#1996)
* Improve gas efficiency of reentrancyGuard

* Add changelog entry

* Fix ReentrancyGuard test
2019-11-23 20:44:45 -03:00
49042f2b1a feat: add baseTokenURI to ERC721Metadata (#1970)
* feat: add baseTokenURI

* fix: tests

* chore: dev notation

* chore: changelog

* chore: typo

* Remove extra getters, return empty URI by default

* Update docs

* Rename baseTokenURI to baseURI

* Roll back visibility change of tokenURI

* Update changelog entry

* Version setBaseURI docs

* Improve internal names and comments

* Fix compilation errors

* Add an external getter for baseURI
2019-11-15 20:22:37 -03:00
d6e10ab786 Forward all gas on PullPayment withdrawal (#1976)
* Add withdrawWithGas

* Improve docs

* Add changelog entry

* Update contracts/payment/PullPayment.sol

Co-Authored-By: Francisco Giordano <frangio.1@gmail.com>

* Remove repeated comment

* Update changelog entry

* Fix inline docs

* Fix changelog formatting
2019-10-28 20:06:02 -03:00
8d166f3e35 Transfer replacement (#1962)
* Add Address.sendEther

* Add documentation to sendEther

* Add changelog entry

* Rename sendEther to sendValue
2019-10-25 15:53:16 -03:00
aae95db4e0 GSN renaming (#1963)
* Merge GSNBouncerBase into GSNRecipient

* Remove emtpy implementations for _pre and _post

* Rename bouncers to recipients

* Rename bouncers documentation to strategies

* Rewrite guides and docstrings to use the strategy naming scheme

* Address review comments

* Apply suggestions from code review

Co-Authored-By: Francisco Giordano <frangio.1@gmail.com>

* change wording of docs
2019-10-25 13:36:56 -03:00
2c11ed59fa Safe Casting Library from uint256 to uintXX (#1926)
* Include Safe Casting Library with complete and exhaustive test-suite.

* linting test file.

* Typo in SafeCast import statement

* Update test/utils/SafeCast.test.js

* Rename `castUXX` to `toUintXX` from suggestion

* Tackling the quick and easy suggestions regarding error string improvements etc.

* typo and changelog update.

* Improve SafeCast tests

* Update test/utils/SafeCast.test.js

* Update test/utils/SafeCast.test.js

* incorrect import

* add SafeCast to docs site

* Update CHANGELOG.md

* Update SafeCast.sol
2019-10-22 13:59:11 -03:00
2ec317ac03 doc.fix(test/TESTING.md): few words and mention Truffle (#1944) 2019-10-11 15:34:07 -03:00
3274d9db00 Upgrade to @openzeppelin/test-helpers@0.5.1 (#1942) 2019-10-10 19:38:23 -03:00
4edd0ee799 doc:fix unit test directory name (#1939) 2019-10-09 13:30:11 -03:00
b8ccf8e0f1 Fix the GSNBouncerERC20Fee token decimals to 18 (#1929)
* fix erc20 fee token decimals to 18

* lint

* Update contracts/GSN/bouncers/GSNBouncerERC20Fee.sol

Co-Authored-By: Nicolás Venturo <nicolas.venturo@gmail.com>

* change location of hardcoded decimals for clarity

* remove mention of decimals from docs

* remove trailing whitespace from guide
2019-10-07 19:21:28 -03:00
f9a94788fb GSNSignatureBouncer fix (#1920)
* GSNSignatureBoucer does not accept zero address

* Linting code.

* Update contracts/GSN/bouncers/GSNBouncerSignature.sol

Makes sense!

Co-Authored-By: Nicolás Venturo <nicolas.venturo@gmail.com>

* Update test/GSN/GSNBouncerSignature.test.js

ok!

Co-Authored-By: Nicolás Venturo <nicolas.venturo@gmail.com>

* Add zero address constant from OZ test Helpers

* revert prettier formatting
2019-10-04 12:39:56 -03:00
19a41980a1 Fix bouncer signature tests (#1915)
* Fix bouncer signature tests

* Update GSNBouncerSignature.test.js
2019-09-11 13:51:07 -03:00
1efa9f6281 Merge GSNContext into GSNRecipient (#1906)
* Merge GSNContext into GSNRecipient

* Update GSNRecipient.test.js

* Update GSNRecipient.sol

* Make GSNRecipient inherit from Context
2019-08-30 17:18:42 -03:00
ba0fd11f52 Renamed symbols as as a part of Issue#1148 (#1891) 2019-08-26 21:00:06 -03:00
635a381460 Fix Part 1 : added tests for getApproved (#1820)
* added tests for getApproved

* added tests for getApproved

* added to changelog

* Corrected some linting issues

* Removed unneccrary tests as pointed out here: b49c2de086 (r307927816)

* Correct Changelog character

* Update ERC721.behavior.js
2019-08-26 20:59:22 -03:00
226c6bd8f1 Remove SignatureBouncer from drafts (#1879)
* Remove SignatureBouncer

* Update changelog entry

* Fix coverage

* Update CHANGELOG.md
2019-08-16 15:49:13 -03:00
d1158ea68c GSN compatibility (#1880)
* switch to using Context internally

* add context import

* Add smoke test to make sure enabling GSN support works

* Update test/GSN/ERC721GSNRecipientMock.test.js

Co-Authored-By: Francisco Giordano <frangio.1@gmail.com>

* Upgrade truffle

* add missing awaits

* Revert "Upgrade truffle"

This reverts commit f9b0ba9019.
2019-08-14 14:21:38 +02:00
0ec1d761aa Initial GSN support (beta) (#1844)
* Add base Context contract

* Add GSNContext and tests

* Add RelayHub deployment to tests

* Add RelayProvider integration, complete GSNContext tests

* Switch dependency to openzeppelin-gsn-provider

* Add default txfee to provider

* Add basic signing recipient

* Sign more values

* Add comment clarifying RelayHub's msg.data

* Make context constructors internal

* Rename SigningRecipient to GSNRecipientSignedData

* Add ERC20Charge recipients

* Harcode RelayHub address into GSNContext

* Fix Solidity linter errors

* Run server from binary, use gsn-helpers to fund it

* Migrate to published @openzeppelin/gsn-helpers

* Silence false-positive compiler warning

* Use GSN helper assertions

* Rename meta-tx to gsn, take out of drafts

* Merge ERC20 charge recipients into a single one

* Rename GSNRecipients to Bouncers

* Add GSNBouncerUtils to decouple the bouncers from GSNRecipient

* Add _upgradeRelayHub

* Store RelayHub address using unstructored storage

* Add IRelayHub

* Add _withdrawDeposits to GSNRecipient

* Add relayHub version to recipient

* Make _acceptRelayedCall and _declineRelayedCall easier to use

* Rename GSNBouncerUtils to GSNBouncerBase, make it IRelayRecipient

* Improve GSNBouncerBase, make pre and post sender-protected and optional

* Fix GSNBouncerERC20Fee, add tests

* Add missing GSNBouncerSignature test

* Override transferFrom in __unstable__ERC20PrimaryAdmin

* Fix gsn dependencies in package.json

* Rhub address slot reduced by 1

* Rename relay hub changed event

* Use released gsn-provider

* Run relayer with short sleep of 1s instead of 100ms

* update package-lock.json

* clear circle cache

* use optimized gsn-provider

* update to latest @openzeppelin/gsn-provider

* replace with gsn dev provider

* remove relay server

* rename arguments in approveFunction

* fix GSNBouncerSignature test

* change gsn txfee

* initialize development provider only once

* update RelayHub interface

* adapt to new IRelayHub.withdraw

* update @openzeppelin/gsn-helpers

* update relayhub singleton address

* fix helper name

* set up gsn provider for coverage too

* lint

* Revert "set up gsn provider for coverage too"

This reverts commit 8a7b5be5f9.

* remove unused code

* add gsn provider to coverage

* move truffle contract options back out

* increase gas limit for coverage

* remove unreachable code

* add more gas for GSNContext test

* fix test suite name

* rename GSNBouncerBase internal API

* remove onlyRelayHub modifier

* add explicit inheritance

* remove redundant event

* update name of bouncers error codes enums

* add basic docs page for gsn contracts

* make gsn directory all caps

* add changelog entry

* lint

* enable test run to fail in coverage
2019-08-12 13:30:03 -03:00
5d34dbecea Functions in SafeMath contract overloaded to accept custom error messages (#1828)
* Imporvement: functions in SafeMath contract overloaded to accept custom error messages.

* CHANGELOG updated, custom error messages added to ERC20, ERC721 and ERC777 for subtraction related exceptions.

* SafeMath overloads for 'add' and 'mul' removed.

* Error messages modified.

* Update CHANGELOG.md
2019-07-29 15:23:34 -03:00
377431bc4c Fix/add erc721 safe mint safe transfer from #1736 (#1816)
* added _safeTransferFrom function

* added safeMint functions

* added package-lock.json for consistency, don't know why it changes

* added initial suggestions/modifications

* change _safeTransferFrom to internal, reverted package-lock.json to original, and changed ERC721Pausable to override _transferFrom instead of transferFrom

* included tests for safeMint functions

* modified safeMint tests to be on ERC721Mock contract

* added safeMint to ERC721Mintable & respective test to ERC721MintBurn.behavior.js
2019-07-29 12:16:55 -03:00
c9f328ef66 Fix Typo (#1808) 2019-06-25 12:46:38 -03:00
489d2e85f1 Replace chai.should with chai.expect (#1780)
* changed exxpect to expect wherever applicable

* Merged with latest branch

* Updated merkleTree helper to latest master branch

* Made linting fixes

* Fix for test build

* updated for Coverage

* Updated Address.test.js

* Undo package-lock changes.
2019-06-24 17:40:05 -03:00
f358a03043 20x performance for merkle tree lib (#1787)
* 20x performance for merkle tree lib

* add semicolon

* Update test/helpers/merkleTree.js

Co-Authored-By: Nicolás Venturo <nicolas.venturo@gmail.com>
2019-06-12 14:59:52 -03:00
b95d7e7f8a Add a simple wrapper for address. (#1773)
* Updated code style to no more than120 characters per line.

* Unify code comments style with Doxygen-style tags.

* Fix the conflicts.

* Add a return value in the contract ERC20Burnable.

* A Add a wrapper function to change type of address to address payable.

* U Modify Address utils.

* A Add test case for Address.

* U Modify code style in ERC20Burnable.

* Add changelog entry.

* Improved dev docs.
2019-05-31 13:51:58 -03:00
fbbff53528 Strings library (#1746)
* Feature Issue #1745

* Feature Issue #1745 remove whitespace in contract

* Feature Issue #1745 fix Solidity linter issues

* Feature Issue #1745 fix JS lint issues

* Update contracts/drafts/Strings.sol

Co-Authored-By: Nicolás Venturo <nicolas.venturo@gmail.com>

* Update contracts/drafts/Strings.sol

Co-Authored-By: Nicolás Venturo <nicolas.venturo@gmail.com>

* Update contracts/drafts/Strings.sol

Co-Authored-By: Nicolás Venturo <nicolas.venturo@gmail.com>

* Updates based on PR feedback

* Remove trailing whitespace

* Update tests based on @nventuro feedback

* Removed return name

* Rename length as suggested

* Rename temp variables in uint256ToString

* Renamed bytes variable to buffer

* Change concatenate to use abi.encodePacked

* Moved OraclizeAPI reference to unit256ToString

* Add emoji concat test

* Remove concatenate

* Remove concatenate from StringsMock and test

* Rename function to fromUint256

* Update StringsMock.sol
2019-05-27 13:31:09 -03:00
a71c3bce32 Update test-helpers to v0.4.0. (#1770) 2019-05-24 13:36:15 -03:00
ad18098d65 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.
2019-05-16 11:50:54 -03:00
64d6fefc11 Move ERC1820 and ERC777 tests out of drafts. 2019-05-08 17:13:27 -03:00
aa4c9feabd Add ERC20 compatibility to ERC777. (#1735)
* Add ERC20 compatibility.

* Reusing ERC20 tests for ERC777.

* Improve documentation.

* Add changelog entry.

* Improved ERC20 behavior tests.

* Add revert reasons to ERC777.

* ERC20 methods allow sending tokens to contracts with no interface.

* Register ERC20 interface.

* Add comment about avoidLockingTokens.

* Improve revert reason string.

* Make ERC777 implement IERC20.

* Fix test revert string.

* Remove unnecesary require.

* Add private _transfer.

* Update contracts/drafts/ERC777/ERC777.sol

Co-Authored-By: nventuro <nicolas.venturo@gmail.com>

* Update private helper names.
2019-05-08 13:13:19 -03:00
376820d55c Hardcode ERC777 granularity to 1, remove tests. (#1739)
* Hardcode ERC777 granularity to 1, remove tests.

* Add clarifying title comment.
2019-05-07 17:05:12 -03:00
2f8e844514 Fix remaining revert reasons. 2019-04-24 11:25:09 -03:00
3682c6575c Added message string for require() (#1704)
* Error handling in ERC20 and ERC721

* Added message string for require.

* Fixed solhint errors.

* Updated PR as per issue #1709

* changes as per #1709 and openzeppelin forum.

* Changes in require statement

* Changes in require statement

* build pipeline fix

* Changes as per @nventuro's comment.

* Update revert reason strings.

* Fianal update of revert reason strings.

* WIP: Updating reason strings in test cases

* WIP: Added changes to ERC20 and ERC721

* Fixes linting errors in *.tes.js files

* Achieved 100% code coverage

* Updated the test cases with shouldFail.reverting.withMessage()

* Fix package-lock.

* address review comments

* fix linter issues

* fix remaining revert reasons
2019-04-24 11:17:08 -03:00
5a2b349992 Feature/erc777 #1159 (#1684)
* IERC777 from specs, constants returned, up to defaultOperators. (#1159)

* IERC777 oprarator approvals (#1159)

* ERC777 oprarator approvals fixes and tests

* IERC777 send and receive with ERC820 (#1159)

* ERC777 Add burn functions and fix send functions (#1159)

* ERC777 Make expectEvent compatible with web3.js 1.0 (#1159)

* ERC777 Add ERC820 deploy script (#1159)

* ERC777 Complete implementation of ERC777 (#1159)

This implementation conforms to the current EIP

* ERC777 Update ERC820 Registry contract to final version (#1159)

* ERC777 Move contracts to 'drafts' folder (#1159)

* ERC777: Update to ERC1820 registry and linter error fix (#1159)

* ERC777: implement recent changes of EIP777 (#1159)

* ERC777 Fix formatting (#1159)

* ERC777 Update to solc 0.5.2 (#1159)

* ERC777 Fix travis CI errors (#1159)

* ERC777 Fix linter errors again... (#1159)

* ERC777 Fix unit test (#1159)

* ERC777 Fix unit test again (#1159)

* Remove extra newlines.

* Rename ERC777Base to ERC777.

* Remove 'Token' from contract names.

* Replace ops for operators.

* Move operator check out of _send.

* Remove ERC777Burnable.

* Remove ERC1820Client, now using the interface directly.

* Minor internal refactors in contracts.

* Delete extra test helpers.

* Simplified tests.

* Add basic 777 tests.

* Add granularity send test.

* Add first operator send tests.

* Add burn tests.

* Refactor send and burn tests.

* Improve send burn refactor.

* Greatly improve test module.

* Burn instead of send removed tokens.

* Add operator tests.

* Improve send tests under changing operators.

* Refactor and merge send and burn tests.

* Add missing and not-implemented tests.

* Make _burn private.

* Fix typo.

* Greatly improve tokensToSend tests.

* Refactor hook tests.

* Fix hook tests.

* Update openzeppelin-test-helpers and ERC1820 address.

* Fix natspec indentation.

* Make interface functions external.

* Remove redundant private revoke and authorize functions.

* Improved readability of if statement.

* Remove unnecessary asserts.

* Add non-one granularity test.

* Fix hook call order in _mint.

* Fix _mint not reverting on failure to implement tokensReceived.

* Remove special case in operatorFn when from is 0.

* Refactor ERC777SenderMock.

* Add tokensReceived tests.

* switch to updated ganache-cli-coverage fork

* Fix linter errors.

* Add mint tests.

* Fix linter errors.

* Fix tests.

* Update test/drafts/ERC777/ERC777.test.js

Co-Authored-By: nventuro <nicolas.venturo@gmail.com>

* Add changelog entry.
2019-04-16 13:13:46 -03:00
963f1eb35b removed unnecessary require and renaming of null to zero (#1717)
* removed unnecessary require

* build pipeline fix

* kept as it is

* Added require
2019-04-15 16:03:44 -03:00
bbe0eefd9f removing unused variables (#1719)
* removing unused variables

* undeleting the _
2019-04-12 13:25:21 -03:00
19c705d928 Fix/rename anyone account #1357 (#1718)
* replacing all instances of from: anyone with from: other

* replacing all instances of from: anyone with from: other

* replacing all instances of from: anyone with from: other

* changing anyone to other

* changing anyone to other
2019-04-11 12:34:10 -03:00
1ebeef7ffd Remove unnecessary SLOAD. (#1715) 2019-04-10 12:29:58 -03:00
81e36d2e74 Fix from account in remove public role behaviors (#1710) 2019-04-05 18:06:22 -03:00
cf7375d6b8 Update openzeppelin-test-helpers dependency. 2019-03-19 17:54:02 -03:00
308a4c9907 Draft EIP 1820 (#1677)
* Add barebones EIP1820 support.

* Update openzeppelin-test-helpers dependency to have ERC1820 support.

* Add tests for ERC1820.

* Improve inline documentation.

* Add changelog entry.

* Update test-helpers, refactor tests to use new helpers.

* Rename ERC1820 to ERC1820Implementer.

* Improve implementer docstring.

* Remove _implementsInterfaceForAddress.

* update openzeppelin-test-helpers to 0.2.0

* Update contracts/drafts/ERC1820Implementer.sol

Co-Authored-By: nventuro <nicolas.venturo@gmail.com>

* Fix how solidity coverage is run to allow for free events.

* Fix coverage testing script.
2019-03-19 15:13:55 -03:00
4dd8575bb6 Improve erc165 testing #1203 (#1666)
* Rename variable from thing to contractUnderTest

* Compute function signatures in ERC165 interfaces

The ERC165 tests currently precompute some known interface ids.
This commit extracts the interfaces into a separate object and
precomputes the individual function signatures.

This will be useful to identify contracts that support an interface
but do not implement all of the corresponding functions.

* Add tests for ERC165 interface implementations

The ERC165 tests confirm that contracts claim to support
particular interfaces ( using the supportsInterface method )

This commit extends those tests to confirm that the corresponding
functions are included in the contract ABI.

It also rewords the existing test names in order to group the
implementation tests with the corresponding interface tests.

* Remove obsolete ERC721Exists interface constant
2019-03-07 19:41:22 -03:00
79dd498b16 Signature Malleability: (#1622)
* Transaction Malleability:
If you allow for both values 0/1 and 27/28, you allow two different
signatures both resulting in a same valid recovery. (r,s,0/1) and
(r,s,27/28) would both be valid, recover the same public key and sign
the same data. Furthermore, given (r,s,0/1), (r,s,27/28) can be
constructed by anyone.

* Transaction Malleability:
EIP-2 still allows signature malleabality for ecrecover(), remove this
possibility and force the signature to be unique.

* Added a reference to appendix F to the yellow paper and improved
comment.

* better test description for testing the version 0, which returns
a zero address

* Check that the conversion from 0/1 to 27/28 only happens if its 0/1

* improved formatting

* Refactor ECDSA code a bit.

* Refactor ECDSA tests a bit.

* Add changelog entry.

* Add high-s check test.
2019-03-07 12:44:28 -03:00
547a5f242a Add extcodesize check to SafeERC20. (#1662)
* Add extcodesize check to SafeERC20.

* Clarify some comments.

* Replace inline assembly with Address.sol.
2019-03-06 14:11:08 -03:00