Merge pull request #228 from crytic/dev-human-summary-printer

Improve the human summary printer
6 years ago · f8244eb1b6
parent cda075ac2f e6c9d186e3
commit f8244eb1b6
21 changed files with 1350 additions and 33 deletions
--- a/scripts/tests_generate_expected_json_4.sh
+++ b/scripts/tests_generate_expected_json_4.sh
@ -23,6 +23,7 @@ generate_expected_json(){
 #generate_expected_json tests/deprecated_calls.sol "deprecated-standards"
 #generate_expected_json tests/erc20_indexed.sol "erc20-indexed"
 #generate_expected_json tests/incorrect_erc20_interface.sol "erc20-interface"
+#generate_expected_json tests/incorrect_erc721_interface.sol "erc721-interface"
 #generate_expected_json tests/uninitialized.sol "uninitialized-state"
 #generate_expected_json tests/backdoor.sol "backdoor"
 #generate_expected_json tests/backdoor.sol "suicidal"
--- a/scripts/travis_install.sh
+++ b/scripts/travis_install.sh
@ -1,4 +1,12 @@
 #!/usr/bin/env bash
+
+# TODO: temporary until the next crytic-compile release
+git clone https://github.com/crytic/crytic-compile
+cd crytic-compile
+git checkout dev
+python setup.py install
+cd ..
+
 python setup.py install
 # Used by travis_test.sh
 pip install deepdiff
--- a/scripts/travis_test_4.sh
+++ b/scripts/travis_test_4.sh
@ -72,6 +72,7 @@ test_slither(){
 test_slither tests/deprecated_calls.sol "deprecated-standards"
 test_slither tests/erc20_indexed.sol "erc20-indexed"
 test_slither tests/incorrect_erc20_interface.sol "erc20-interface"
+test_slither tests/incorrect_erc721_interface.sol "erc721-interface"
 test_slither tests/uninitialized.sol "uninitialized-state"
 test_slither tests/backdoor.sol "backdoor"
 test_slither tests/backdoor.sol "suicidal"
--- a/slither/core/declarations/contract.py
+++ b/slither/core/declarations/contract.py
@ -5,6 +5,9 @@ import logging
 from slither.core.children.child_slither import ChildSlither
 from slither.core.source_mapping.source_mapping import SourceMapping
 from slither.core.declarations.function import Function
+from slither.utils.erc import ERC20_signatures, \
+    ERC165_signatures, ERC223_signatures, ERC721_signatures, \
+    ERC1820_signatures, ERC777_signatures

 logger = logging.getLogger("Contract")

@ -35,6 +38,8 @@ class Contract(ChildSlither, SourceMapping):
        self._using_for = {}
        self._kind = None

+        self._signatures = None
+

        self._initial_state_variables = [] # ssa

@ -212,6 +217,20 @@ class Contract(ChildSlither, SourceMapping):
    ###################################################################################
    ###################################################################################

+    @property
+    def functions_signatures(self):
+        """
+        Return the signatures of all the public/eterxnal functions/state variables
+        :return: list(string) the signatures of all the functions that can be called
+        """
+        if self._signatures == None:
+            sigs = [v.full_name for v in self.state_variables if v.visibility in ['public',
+                                                                                  'external']]
+
+            sigs += set([f.full_name for f in self.functions if f.visibility in ['public', 'external']])
+            self._signatures = list(set(sigs))
+        return self._signatures
+
    @property
    def functions(self):
        '''
@ -527,19 +546,127 @@ class Contract(ChildSlither, SourceMapping):
        """
        return all((not f.is_implemented) for f in self.functions)

+    # endregion
+    ###################################################################################
+    ###################################################################################
+    # region ERC conformance
+    ###################################################################################
+    ###################################################################################
+
+    def ercs(self):
+        """
+        Return the ERC implemented
+        :return: list of string
+        """
+        all = [('ERC20', lambda x: x.is_erc20()),
+               ('ERC165', lambda x: x.is_erc165()),
+               ('ERC1820', lambda x: x.is_erc1820()),
+               ('ERC223', lambda x: x.is_erc223()),
+               ('ERC721', lambda x: x.is_erc721()),
+               ('ERC777', lambda x: x.is_erc777())]
+
+        return [erc[0] for erc in all if erc[1](self)]
+
    def is_erc20(self):
        """
            Check if the contract is an erc20 token

            Note: it does not check for correct return values
-        Returns:
-            bool
+        :return: Returns a true if the contract is an erc20
+        """
+        full_names = self.functions_signatures
+        return all((s in full_names for s in ERC20_signatures))
+
+    def is_erc165(self):
+        """
+            Check if the contract is an erc165 token
+
+            Note: it does not check for correct return values
+        :return: Returns a true if the contract is an erc165
+        """
+        full_names = self.functions_signatures
+        return all((s in full_names for s in ERC165_signatures))
+
+    def is_erc1820(self):
+        """
+            Check if the contract is an erc1820
+
+            Note: it does not check for correct return values
+        :return: Returns a true if the contract is an erc165
+        """
+        full_names = self.functions_signatures
+        return all((s in full_names for s in ERC1820_signatures))
+
+    def is_erc223(self):
+        """
+            Check if the contract is an erc223 token
+
+            Note: it does not check for correct return values
+        :return: Returns a true if the contract is an erc223
+        """
+        full_names = self.functions_signatures
+        return all((s in full_names for s in ERC223_signatures))
+
+    def is_erc721(self):
+        """
+            Check if the contract is an erc721 token
+
+            Note: it does not check for correct return values
+        :return: Returns a true if the contract is an erc721
+        """
+        full_names = self.functions_signatures
+        return all((s in full_names for s in ERC721_signatures))
+
+    def is_erc777(self):
+        """
+            Check if the contract is an erc777
+
+            Note: it does not check for correct return values
+        :return: Returns a true if the contract is an erc165
        """
-        full_names = [f.full_name for f in self.functions]
-        return 'transfer(address,uint256)' in full_names and\
-               'transferFrom(address,address,uint256)' in full_names and\
+        full_names = self.functions_signatures
+        return all((s in full_names for s in ERC777_signatures))
+
+    def is_possible_erc20(self):
+        """
+        Checks if the provided contract could be attempting to implement ERC20 standards.
+        :param contract: The contract to check for token compatibility.
+        :return: Returns a boolean indicating if the provided contract met the token standard.
+        """
+        # We do not check for all the functions, as name(), symbol(), might give too many FPs
+        full_names = self.functions_signatures
+        return 'transfer(address,uint256)' in full_names or \
+               'transferFrom(address,address,uint256)' in full_names or \
               'approve(address,uint256)' in full_names

+    def is_possible_erc721(self):
+        """
+        Checks if the provided contract could be attempting to implement ERC721 standards.
+        :param contract: The contract to check for token compatibility.
+        :return: Returns a boolean indicating if the provided contract met the token standard.
+        """
+        # We do not check for all the functions, as name(), symbol(), might give too many FPs
+        full_names = self.functions_signatures
+        return ('ownerOf(uint256)' in full_names or
+                'safeTransferFrom(address,address,uint256,bytes)' in full_names or
+                'safeTransferFrom(address,address,uint256)' in full_names or
+                'setApprovalForAll(address,bool)' in full_names or
+                'getApproved(uint256)' in full_names or
+                'isApprovedForAll(address,address)' in full_names)
+
+
+    # endregion
+    ###################################################################################
+    ###################################################################################
+    # region Dependencies
+    ###################################################################################
+    ###################################################################################
+
+    def is_from_dependency(self):
+        if self.slither.crytic_compile is None:
+            return False
+        return self.slither.crytic_compile.is_dependency(self.source_mapping['filename_absolute'])
+
    # endregion
    ###################################################################################
    ###################################################################################
--- a/slither/core/variables/state_variable.py
+++ b/slither/core/variables/state_variable.py
@ -1,8 +1,53 @@
 from .variable import Variable
 from slither.core.children.child_contract import ChildContract
+from slither.utils.type import export_nested_types_from_variable

 class StateVariable(ChildContract, Variable):

+    ###################################################################################
+    ###################################################################################
+    # region Signature
+    ###################################################################################
+    ###################################################################################
+
+    @property
+    def signature(self):
+        """
+            Return the signature of the state variable as a function signature
+            :return: (str, list(str), list(str)), as (name, list parameters type, list return values type)
+        """
+        return self.name, [str(x) for x in export_nested_types_from_variable(self)], self.type
+
+    @property
+    def signature_str(self):
+        """
+            Return the signature of the state variable as a function signature
+            :return: str: func_name(type1,type2) returns(type3)
+        """
+        name, parameters, returnVars = self.signature
+        return name+'('+','.join(parameters)+') returns('+','.join(returnVars)+')'
+
+    # endregion
+    ###################################################################################
+    ###################################################################################
+    # region Name
+    ###################################################################################
+    ###################################################################################
+
    @property
    def canonical_name(self):
        return '{}:{}'.format(self.contract.name, self.name)
+
+    @property
+    def full_name(self):
+        """
+            Return the name of the state variable as a function signaure
+            str: func_name(type1,type2)
+            :return: the function signature without the return values
+        """
+        name, parameters, _ = self.signature
+        return name+'('+','.join(parameters)+')'
+
+    # endregion
+    ###################################################################################
+    ###################################################################################
--- a/slither/detectors/all_detectors.py
+++ b/slither/detectors/all_detectors.py
@ -28,8 +28,9 @@ from .shadowing.builtin_symbols import BuiltinSymbolShadowing
 from .operations.block_timestamp import Timestamp
 from .statements.calls_in_loop import MultipleCallsInLoop
 from .statements.incorrect_strict_equality import IncorrectStrictEquality
-from .erc20.incorrect_interface import IncorrectERC20InterfaceDetection
-from .erc20.unindexed_event_parameters import UnindexedERC20EventParameters
+from .erc.incorrect_erc20_interface import IncorrectERC20InterfaceDetection
+from .erc.incorrect_erc721_interface import IncorrectERC721InterfaceDetection
+from .erc.unindexed_event_parameters import UnindexedERC20EventParameters
 from .statements.deprecated_calls import DeprecatedStandards
 from .source.rtlo import RightToLeftOverride
 from .statements.too_many_digits import TooManyDigits
--- a/slither/detectors/erc20/init.py
+++ b/slither/detectors/erc20/init.py
--- a/slither/detectors/erc/incorrect_erc20_interface.py
+++ b/slither/detectors/erc/incorrect_erc20_interface.py
@ -18,7 +18,7 @@ class IncorrectERC20InterfaceDetection(AbstractDetector):
    WIKI = 'https://github.com/crytic/slither/wiki/Detector-Documentation#incorrect-erc20-interface'

    WIKI_TITLE = 'Incorrect erc20 interface'
-    WIKI_DESCRIPTION = 'Lack of return value for the ERC20 `approve`/`transfer`/`transferFrom` functions. A contract compiled with solidity > 0.4.22 interacting with these functions will fail to execute them, as the return value is missing.'
+    WIKI_DESCRIPTION = 'Incorrect return values for ERC20 functions. A contract compiled with solidity > 0.4.22 interacting with these functions will fail to execute them, as the return value is missing.'
    WIKI_EXPLOIT_SCENARIO = '''
 ```solidity
 contract Token{
@ -28,7 +28,7 @@ contract Token{
 ```
 `Token.transfer` does not return a boolean. Bob deploys the token. Alice creates a contract that interacts with it but assumes a correct ERC20 interface implementation. Alice's contract is unable to interact with Bob's contract.'''

-    WIKI_RECOMMENDATION = 'Return a boolean for the `approve`/`transfer`/`transferFrom` functions.'
+    WIKI_RECOMMENDATION = 'Set the appropriate return values and value-types for the defined ERC20 functions.'

    @staticmethod
    def incorrect_erc20_interface(signature):
@ -43,6 +43,15 @@ contract Token{
        if name == 'approve' and parameters == ['address', 'uint256'] and returnVars != ['bool']:
            return True

+        if name == 'allowance' and parameters == ['address', 'address'] and returnVars != ['uint256']:
+            return True
+
+        if name == 'balanceOf' and parameters == ['address'] and returnVars != ['uint256']:
+            return True
+
+        if name == 'totalSupply' and parameters == [] and returnVars != ['uint256']:
+            return True
+
        return False

    @staticmethod
@ -52,15 +61,23 @@ contract Token{
        Returns:
            list(str) : list of incorrect function signatures
        """
-        functions = [f for f in contract.functions if f.contract == contract and \
-                     IncorrectERC20InterfaceDetection.incorrect_erc20_interface(f.signature)]
+        # Verify this is an ERC20 contract.
+        if not contract.is_possible_erc20():
+            return []
+
+        # If this contract implements a function from ERC721, we can assume it is an ERC721 token. These tokens
+        # offer functions which are similar to ERC20, but are not compatible.
+        if contract.is_possible_erc721():
+            return []
+
+        functions = [f for f in contract.functions if IncorrectERC20InterfaceDetection.incorrect_erc20_interface(f.signature)]
        return functions

    def _detect(self):
        """ Detect incorrect erc20 interface

        Returns:
-            dict: [contrat name] = set(str)  events
+            dict: [contract name] = set(str)  events
        """
        results = []
        for c in self.contracts:
--- a/slither/detectors/erc/incorrect_erc721_interface.py
+++ b/slither/detectors/erc/incorrect_erc721_interface.py
@ -0,0 +1,96 @@
+"""
+Detect incorrect erc721 interface.
+"""
+from slither.detectors.abstract_detector import AbstractDetector, DetectorClassification
+
+
+class IncorrectERC721InterfaceDetection(AbstractDetector):
+    """
+    Incorrect ERC721 Interface
+    """
+
+    ARGUMENT = 'erc721-interface'
+    HELP = 'Incorrect ERC721 interfaces'
+    IMPACT = DetectorClassification.MEDIUM
+    CONFIDENCE = DetectorClassification.HIGH
+
+    WIKI = 'https://github.com/crytic/slither/wiki/Detector-Documentation#incorrect-erc721-interface'
+
+    WIKI_TITLE = 'Incorrect erc721 interface'
+    WIKI_DESCRIPTION = 'Incorrect return values for ERC721 functions. A contract compiled with solidity > 0.4.22 interacting with these functions will fail to execute them, as the return value is missing.'
+    WIKI_EXPLOIT_SCENARIO = '''
+```solidity
+contract Token{
+    function ownerOf(uint256 _tokenId) external view returns (bool);
+    //...
+}
+```
+`Token.ownerOf` does not return an address as ERC721 expects. Bob deploys the token. Alice creates a contract that interacts with it but assumes a correct ERC721 interface implementation. Alice's contract is unable to interact with Bob's contract.'''
+
+    WIKI_RECOMMENDATION = 'Set the appropriate return values and value-types for the defined ERC721 functions.'
+
+    @staticmethod
+    def incorrect_erc721_interface(signature):
+        (name, parameters, returnVars) = signature
+
+        # ERC721
+        if name == 'balanceOf' and parameters == ['address'] and returnVars != ['uint256']:
+            return True
+        if name == 'ownerOf' and parameters == ['uint256'] and returnVars != ['address']:
+            return True
+        if name == 'safeTransferFrom' and parameters == ['address', 'address', 'uint256', 'bytes'] and returnVars != []:
+            return True
+        if name == 'safeTransferFrom' and parameters == ['address', 'address', 'uint256'] and returnVars != []:
+            return True
+        if name == 'transferFrom' and parameters == ['address', 'address', 'uint256'] and returnVars != []:
+            return True
+        if name == 'approve' and parameters == ['address', 'uint256'] and returnVars != []:
+            return True
+        if name == 'setApprovalForAll' and parameters == ['address', 'bool'] and returnVars != []:
+            return True
+        if name == 'getApproved' and parameters == ['uint256'] and returnVars != ['address']:
+            return True
+        if name == 'isApprovedForAll' and parameters == ['address', 'address'] and returnVars != ['bool']:
+            return True
+
+        # ERC165 (dependency)
+        if name == 'supportsInterface' and parameters == ['bytes4'] and returnVars != ['bool']:
+            return True
+
+        return False
+
+    @staticmethod
+    def detect_incorrect_erc721_interface(contract):
+        """ Detect incorrect ERC721 interface
+
+        Returns:
+            list(str) : list of incorrect function signatures
+        """
+
+        # Verify this is an ERC721 contract.
+        if not contract.is_possible_erc721() or not contract.is_possible_erc20():
+            return []
+
+        functions = [f for f in contract.functions if IncorrectERC721InterfaceDetection.incorrect_erc721_interface(f.signature)]
+        return functions
+
+    def _detect(self):
+        """ Detect incorrect erc721 interface
+
+        Returns:
+            dict: [contract name] = set(str)  events
+        """
+        results = []
+        for c in self.contracts:
+            functions = IncorrectERC721InterfaceDetection.detect_incorrect_erc721_interface(c)
+            if functions:
+                info = "{} ({}) has incorrect ERC721 function interface(s):\n"
+                info = info.format(c.name,
+                                   c.source_mapping_str)
+                for function in functions:
+                    info += "\t-{} ({})\n".format(function.name, function.source_mapping_str)
+                json = self.generate_json_result(info)
+                self.add_functions_to_json(functions, json)
+                results.append(json)
+
+        return results
--- a/slither/detectors/erc20/unindexed_event_parameters.py
+++ b/slither/detectors/erc20/unindexed_event_parameters.py
--- a/slither/printers/summary/human_summary.py
+++ b/slither/printers/summary/human_summary.py
@ -6,7 +6,7 @@ import logging
 from slither.printers.abstract_printer import AbstractPrinter
 from slither.utils.code_complexity import compute_cyclomatic_complexity
 from slither.utils.colors import green, red, yellow
-
+from slither.utils.standard_libraries import is_standard_library

 class PrinterHumanSummary(AbstractPrinter):
    ARGUMENT = 'human-summary'
@ -88,8 +88,14 @@ class PrinterHumanSummary(AbstractPrinter):
        issues_informational, issues_low, issues_medium, issues_high = self._get_detectors_result()
        txt = "Number of informational issues: {}\n".format(green(issues_informational))
        txt += "Number of low issues: {}\n".format(green(issues_low))
-        txt += "Number of medium issues: {}\n".format(yellow(issues_medium))
-        txt += "Number of high issues: {}\n".format(red(issues_high))
+        if issues_medium > 0:
+            txt += "Number of medium issues: {}\n".format(yellow(issues_medium))
+        else:
+            txt += "Number of medium issues: {}\n".format(green(issues_medium))
+        if issues_high > 0:
+            txt += "Number of high issues: {}\n".format(red(issues_high))
+        else:
+            txt += "Number of high issues: {}\n\n".format(green(issues_high))

        return txt

@ -119,6 +125,49 @@ class PrinterHumanSummary(AbstractPrinter):
    def _number_functions(contract):
        return len(contract.functions)

+    def _lines_number(self):
+        if not self.slither.source_code:
+            return None
+        total_dep_lines = 0
+        total_lines = 0
+        for filename, source_code in self.slither.source_code.items():
+            lines = len(source_code.splitlines())
+            is_dep = False
+            if self.slither.crytic_compile:
+                is_dep = self.slither.crytic_compile.is_dependency(filename)
+            if is_dep:
+                total_dep_lines += lines
+            else:
+                total_lines += lines
+        return total_lines, total_dep_lines
+
+    def _compilation_type(self):
+        if self.slither.crytic_compile is None:
+            return 'Compilation non standard\n'
+        return f'Compiled with {self.slither.crytic_compile.type}\n'
+
+    def _number_contracts(self):
+        if self.slither.crytic_compile is None:
+            len(self.slither.contracts), 0
+        deps = [c for c in self.slither.contracts if c.is_from_dependency()]
+        contracts = [c for c in self.slither.contracts if not c.is_from_dependency()]
+        return len(contracts), len(deps)
+
+    def _standard_libraries(self):
+        libraries = []
+        for contract in self.contracts:
+            lib = is_standard_library(contract)
+            if lib:
+                libraries.append(lib)
+
+        return libraries
+
+    def _ercs(self):
+        ercs = []
+        for contract in self.contracts:
+            ercs += contract.ercs()
+        return list(set(ercs))
+
    def output(self, _filename):
        """
        _filename is not used
@ -126,15 +175,37 @@ class PrinterHumanSummary(AbstractPrinter):
                _filename(string)
        """

-        txt = "Analyze of {}\n".format(self.slither.filename)
+        txt = "\n"
+        txt += self._compilation_type()
+
+        lines_number = self._lines_number()
+        if lines_number:
+            total_lines, total_dep_lines = lines_number
+            txt += f'Number of lines: {total_lines} (+ {total_dep_lines} in dependencies)\n'
+
+        number_contracts, number_contracts_deps = self._number_contracts()
+        txt += f'Number of contracts: {number_contracts} (+ {number_contracts_deps} in dependencies) \n\n'
+
        txt += self.get_detectors_result()
+
+        libs = self._standard_libraries()
+        if libs:
+            txt += f'\nUse: {", ".join(libs)}\n'
+
+        ercs = self._ercs()
+        if ercs:
+            txt += f'ERCs: {", ".join(ercs)}\n'
+
        for contract in self.slither.contracts_derived:
            txt += "\nContract {}\n".format(contract.name)
            txt += self.is_complex_code(contract)
+            txt += '\tNumber of functions: {}\n'.format(self._number_functions(contract))
+            ercs = contract.ercs()
+            if ercs:
+                txt += '\tERCs: ' + ','.join(ercs) + '\n'
            is_erc20 = contract.is_erc20()
-            txt += '\tNumber of functions:{}'.format(self._number_functions(contract))
-            txt += "\tIs ERC20 token: {}\n".format(contract.is_erc20())
            if is_erc20:
+                txt += '\tERC20 info:\n'
                txt += self.get_summary_erc20(contract)

        self.info(txt)
--- a/slither/slither.py
+++ b/slither/slither.py
@ -45,9 +45,6 @@ class Slither(SlitherSolc):

        '''

-        truffle_ignore = kwargs.get('truffle_ignore', False)
-        embark_ignore = kwargs.get('embark_ignore', False)
-
        # list of files provided (see --splitted option)
        if isinstance(contract, list):
            self._init_from_list(contract)
@ -56,13 +53,13 @@ class Slither(SlitherSolc):
        else:
            super(Slither, self).__init__('')
            try:
-                cryticCompile = CryticCompile(contract, **kwargs)
-                self._crytic_compile = cryticCompile
+                crytic_compile = CryticCompile(contract, **kwargs)
+                self._crytic_compile = crytic_compile
            except InvalidCompilation as e:
                logger.error('Invalid compilation')
                logger.error(e)
                exit(-1)
-            for path, ast in cryticCompile.asts.items():
+            for path, ast in crytic_compile.asts.items():

                self._parse_contracts_from_loaded_json(ast, path)
                self._add_source_code(path)
--- a/slither/utils/erc.py
+++ b/slither/utils/erc.py
@ -0,0 +1,69 @@
+
+def erc_to_signatures(erc):
+    return [f'{e[0]}({",".join(e[1])})' for e in erc]
+
+
+# Final
+# https://eips.ethereum.org/EIPS/eip-20
+# name, symbolc, decimals are optionals
+ERC20 = [('totalSupply', [], 'uint256'),
+         ('balanceOf', ['address'], 'uint256'),
+         ('transfer', ['address', 'uint256'], 'bool'),
+         ('transferFrom', ['address', 'address', 'uint256'], 'bool'),
+         ('approve', ['address', 'uint256'], 'bool'),
+         ('allowance', ['address', 'address'], 'uint256')]
+ERC20_signatures = erc_to_signatures(ERC20)
+
+# Draft
+# https://github.com/ethereum/eips/issues/223
+ERC223 = [('name', [], 'string'),
+          ('symbol', [], 'string'),
+          ('decimals', [], 'uint8'),
+          ('totalSupply', [], 'uint256'),
+          ('balanceOf', ['address'], 'uint256'),
+          ('transfer', ['address', 'uint256'], 'bool'),
+          ('transfer', ['address', 'uint256', 'bytes'], 'bool'),
+          ('transfer', ['address', 'uint256', 'bytes', 'string'], 'bool')]
+ERC223_signatures = erc_to_signatures(ERC223)
+
+# Final
+# https://eips.ethereum.org/EIPS/eip-165
+ERC165 = [('supportsInterface', ['bytes4'], 'bool')]
+ERC165_signatures = erc_to_signatures(ERC165)
+
+# Final
+# https://eips.ethereum.org/EIPS/eip-721
+# Must have ERC165
+# name, symbol, tokenURI are optionals
+ERC721 = [('balanceOf', ['address'],  'uint256'),
+          ('ownerOf', ['uint256'],  'address'),
+          ('safeTransferFrom', ['address', 'address', 'uint256', 'bytes'], ''),
+          ('safeTransferFrom', ['address', 'address', 'uint256'], ''),
+          ('transferFrom', ['address', 'address', 'uint256'], ''),
+          ('approve', ['address', 'uint256'], ''),
+          ('setApprovalForAll', ['address', 'bool'], ''),
+          ('getApproved', ['uint256'], 'address'),
+          ('isApprovedForAll', ['address', 'address'], 'bool')] + ERC165
+ERC721_signatures = erc_to_signatures(ERC721)
+
+# Final
+# https://eips.ethereum.org/EIPS/eip-1820
+ERC1820 = [('canImplementInterfaceForAddress', ['bytes32', 'address'], 'bytes32')]
+ERC1820_signatures = erc_to_signatures(ERC1820)
+
+# Last Call
+# https://eips.ethereum.org/EIPS/eip-777
+ERC777 = [('name', [], 'string'),
+          ('symbol', [], 'string'),
+          ('totalSupply', [], 'uint256'),
+          ('balanceOf', ['address'], 'uint256'),
+          ('granularity', [], 'uint256'),
+          ('defaultOperators', [], 'address[]'),
+          ('isOperatorFor', ['address', 'address'], 'bool'),
+          ('authorizeOperator', ['address'], ''),
+          ('revokeOperator', ['address'], ''),
+          ('send', ['address', 'uint256', 'bytes'], ''),
+          ('operatorSend', ['address', 'address', 'uint256', 'bytes', 'bytes'], ''),
+          ('burn', ['uint256', 'bytes'] , ''),
+          ('operatorBurn', ['address', 'uint256', 'bytes', 'bytes'] , '')]
+ERC777_signatures = erc_to_signatures(ERC777)
--- a/slither/utils/standard_libraries.py
+++ b/slither/utils/standard_libraries.py
@ -0,0 +1,193 @@
+from pathlib import Path
+
+
+libraries = {
+    'Openzeppelin-SafeMath': lambda x: is_openzepellin_safemath(x),
+    'Openzeppelin-ECRecovery': lambda x: is_openzepellin_ecrecovery(x),
+    'Openzeppelin-Ownable': lambda x: is_openzepellin_ownable(x),
+    'Openzeppelin-ERC20': lambda x: is_openzepellin_erc20(x),
+    'Openzeppelin-ERC721': lambda x: is_openzepellin_erc721(x),
+    'Zos-Upgrade': lambda x: is_zos_initializable(x),
+    'Dapphub-DSAuth': lambda x: is_dapphub_ds_auth(x),
+    'Dapphub-DSMath': lambda x: is_dapphub_ds_math(x),
+    'Dapphub-DSToken': lambda x: is_dapphub_ds_token(x),
+    'Dapphub-DSProxy': lambda x: is_dapphub_ds_proxy(x),
+    'Dapphub-DSGroup': lambda x: is_dapphub_ds_group(x),
+}
+
+def is_standard_library(contract):
+    for name, is_lib in libraries.items():
+        if is_lib(contract):
+            return name
+    return None
+
+
+###################################################################################
+###################################################################################
+# region General libraries
+###################################################################################
+###################################################################################
+
+
+def is_openzepellin(contract):
+    if not contract.is_from_dependency():
+        return False
+    return 'openzeppelin-solidity' in Path(contract.source_mapping['filename_absolute']).parts
+
+
+def is_zos(contract):
+    if not contract.is_from_dependency():
+        return False
+    return 'zos-lib' in Path(contract.source_mapping['filename_absolute']).parts
+
+
+# endregion
+###################################################################################
+###################################################################################
+# region SafeMath
+###################################################################################
+###################################################################################
+
+
+def is_safemath(contract):
+    return contract.name == "SafeMath"
+
+
+def is_openzepellin_safemath(contract):
+    return is_safemath(contract) and is_openzepellin(contract)
+
+# endregion
+###################################################################################
+###################################################################################
+# region ECRecovery
+###################################################################################
+###################################################################################
+
+
+def is_ecrecovery(contract):
+    return contract.name == 'ECRecovery'
+
+
+def is_openzepellin_ecrecovery(contract):
+    return is_ecrecovery(contract) and is_openzepellin(contract)
+
+
+# endregion
+###################################################################################
+###################################################################################
+# region Ownable
+###################################################################################
+###################################################################################
+
+
+def is_ownable(contract):
+    return contract.name == 'Ownable'
+
+
+def is_openzepellin_ownable(contract):
+    return is_ownable(contract) and is_openzepellin(contract)
+
+
+# endregion
+###################################################################################
+###################################################################################
+# region ERC20
+###################################################################################
+###################################################################################
+
+
+def is_erc20(contract):
+    return contract.name == 'ERC20'
+
+
+def is_openzepellin_erc20(contract):
+    return is_erc20(contract) and is_openzepellin(contract)
+
+
+# endregion
+###################################################################################
+###################################################################################
+# region ERC721
+###################################################################################
+###################################################################################
+
+
+def is_erc721(contract):
+    return contract.name == 'ERC721'
+
+
+def is_openzepellin_erc721(contract):
+    return is_erc721(contract) and is_openzepellin(contract)
+
+
+# endregion
+###################################################################################
+###################################################################################
+# region Zos Initializable
+###################################################################################
+###################################################################################
+
+
+def is_initializable(contract):
+    return contract.name == 'Initializable'
+
+
+def is_zos_initializable(contract):
+    return is_initializable(contract) and is_zos(contract)
+
+
+# endregion
+###################################################################################
+###################################################################################
+# region DappHub
+###################################################################################
+###################################################################################
+
+dapphubs = {
+    'DSAuth': 'ds-auth',
+    'DSMath': 'ds-math',
+    'DSToken': 'ds-token',
+    'DSProxy': 'ds-proxy',
+    'DSGroup': 'ds-group',
+}
+
+
+def _is_ds(contract, name):
+    return contract.name == name
+
+def _is_dappdhub_ds(contract, name):
+    if not contract.is_from_dependency():
+        return False
+    if not dapphubs[name] in Path(contract.source_mapping['filename_absolute']).parts:
+        return False
+    return _is_ds(contract, name)
+
+def is_ds_auth(contract):
+    return _is_ds(contract, 'DSAuth')
+
+def is_dapphub_ds_auth(contract):
+    return _is_dappdhub_ds(contract, 'DSAuth')
+
+def is_ds_math(contract):
+    return _is_ds(contract, 'DSMath')
+
+def is_dapphub_ds_math(contract):
+    return _is_dappdhub_ds(contract, 'DSMath')
+
+def is_ds_token(contract):
+    return _is_ds(contract, 'DSToken')
+
+def is_dapphub_ds_token(contract):
+    return _is_dappdhub_ds(contract, 'DSToken')
+
+def is_ds_proxy(contract):
+    return _is_ds(contract, 'DSProxy')
+
+def is_dapphub_ds_proxy(contract):
+    return _is_dappdhub_ds(contract, 'DSProxy')
+
+def is_ds_group(contract):
+    return _is_ds(contract, 'DSGroup')
+
+def is_dapphub_ds_group(contract):
+    return _is_dappdhub_ds(contract, 'DSGroup')
--- a/slither/utils/type.py
+++ b/slither/utils/type.py
@ -1,16 +1,19 @@
 from slither.core.solidity_types import (ArrayType, MappingType, ElementaryType)

+
 def _add_mapping_parameter(t, l):
    while isinstance(t, MappingType):
        l.append(t.type_from)
        t = t.type_to
    _add_array_parameter(t, l)

+
 def _add_array_parameter(t, l):
    while isinstance(t, ArrayType):
        l.append(ElementaryType('uint256'))
        t = t.type

+
 def export_nested_types_from_variable(variable):
    """
    Export the list of nested types (mapping/array)
--- a/tests/expected_json/incorrect_erc20_interface.erc20-interface.json
+++ b/tests/expected_json/incorrect_erc20_interface.erc20-interface.json
@ -3,20 +3,184 @@
    "check": "erc20-interface",
    "impact": "Medium",
    "confidence": "High",
-    "description": "Token (tests/incorrect_erc20_interface.sol#3-7) has incorrect ERC20 function interface(s):\n\t-transfer (tests/incorrect_erc20_interface.sol#5)\n",
+    "description": "Token (tests/incorrect_erc20_interface.sol#3-10) has incorrect ERC20 function interface(s):\n\t-transfer (tests/incorrect_erc20_interface.sol#4)\n\t-approve (tests/incorrect_erc20_interface.sol#5)\n\t-transferFrom (tests/incorrect_erc20_interface.sol#6)\n\t-totalSupply (tests/incorrect_erc20_interface.sol#7)\n\t-balanceOf (tests/incorrect_erc20_interface.sol#8)\n\t-allowance (tests/incorrect_erc20_interface.sol#9)\n",
    "elements": [
+      {
+        "type": "function",
+        "name": "allowance",
+        "source_mapping": {
+          "start": 319,
+          "length": 60,
+          "filename_used": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
+          "filename_relative": "tests/incorrect_erc20_interface.sol",
+          "filename_absolute": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
+          "filename_short": "tests/incorrect_erc20_interface.sol",
+          "lines": [
+            9
+          ],
+          "starting_column": 5,
+          "ending_column": 65
+        },
+        "contract": {
+          "type": "contract",
+          "name": "Token",
+          "source_mapping": {
+            "start": 26,
+            "length": 355,
+            "filename_used": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
+            "filename_relative": "tests/incorrect_erc20_interface.sol",
+            "filename_absolute": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
+            "filename_short": "tests/incorrect_erc20_interface.sol",
+            "lines": [
+              3,
+              4,
+              5,
+              6,
+              7,
+              8,
+              9,
+              10
+            ],
+            "starting_column": 1,
+            "ending_column": 2
+          }
+        }
+      },
+      {
+        "type": "function",
+        "name": "approve",
+        "source_mapping": {
+          "start": 102,
+          "length": 55,
+          "filename_used": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
+          "filename_relative": "tests/incorrect_erc20_interface.sol",
+          "filename_absolute": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
+          "filename_short": "tests/incorrect_erc20_interface.sol",
+          "lines": [
+            5
+          ],
+          "starting_column": 5,
+          "ending_column": 60
+        },
+        "contract": {
+          "type": "contract",
+          "name": "Token",
+          "source_mapping": {
+            "start": 26,
+            "length": 355,
+            "filename_used": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
+            "filename_relative": "tests/incorrect_erc20_interface.sol",
+            "filename_absolute": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
+            "filename_short": "tests/incorrect_erc20_interface.sol",
+            "lines": [
+              3,
+              4,
+              5,
+              6,
+              7,
+              8,
+              9,
+              10
+            ],
+            "starting_column": 1,
+            "ending_column": 2
+          }
+        }
+      },
+      {
+        "type": "function",
+        "name": "balanceOf",
+        "source_mapping": {
+          "start": 273,
+          "length": 41,
+          "filename_used": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
+          "filename_relative": "tests/incorrect_erc20_interface.sol",
+          "filename_absolute": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
+          "filename_short": "tests/incorrect_erc20_interface.sol",
+          "lines": [
+            8
+          ],
+          "starting_column": 5,
+          "ending_column": 46
+        },
+        "contract": {
+          "type": "contract",
+          "name": "Token",
+          "source_mapping": {
+            "start": 26,
+            "length": 355,
+            "filename_used": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
+            "filename_relative": "tests/incorrect_erc20_interface.sol",
+            "filename_absolute": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
+            "filename_short": "tests/incorrect_erc20_interface.sol",
+            "lines": [
+              3,
+              4,
+              5,
+              6,
+              7,
+              8,
+              9,
+              10
+            ],
+            "starting_column": 1,
+            "ending_column": 2
+          }
+        }
+      },
+      {
+        "type": "function",
+        "name": "totalSupply",
+        "source_mapping": {
+          "start": 236,
+          "length": 32,
+          "filename_used": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
+          "filename_relative": "tests/incorrect_erc20_interface.sol",
+          "filename_absolute": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
+          "filename_short": "tests/incorrect_erc20_interface.sol",
+          "lines": [
+            7
+          ],
+          "starting_column": 5,
+          "ending_column": 37
+        },
+        "contract": {
+          "type": "contract",
+          "name": "Token",
+          "source_mapping": {
+            "start": 26,
+            "length": 355,
+            "filename_used": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
+            "filename_relative": "tests/incorrect_erc20_interface.sol",
+            "filename_absolute": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
+            "filename_short": "tests/incorrect_erc20_interface.sol",
+            "lines": [
+              3,
+              4,
+              5,
+              6,
+              7,
+              8,
+              9,
+              10
+            ],
+            "starting_column": 1,
+            "ending_column": 2
+          }
+        }
+      },
      {
        "type": "function",
        "name": "transfer",
        "source_mapping": {
-          "start": 47,
+          "start": 46,
          "length": 51,
          "filename_used": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
          "filename_relative": "tests/incorrect_erc20_interface.sol",
          "filename_absolute": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
          "filename_short": "tests/incorrect_erc20_interface.sol",
          "lines": [
-            5
+            4
          ],
          "starting_column": 5,
          "ending_column": 56
@ -26,7 +190,48 @@
          "name": "Token",
          "source_mapping": {
            "start": 26,
-            "length": 75,
+            "length": 355,
+            "filename_used": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
+            "filename_relative": "tests/incorrect_erc20_interface.sol",
+            "filename_absolute": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
+            "filename_short": "tests/incorrect_erc20_interface.sol",
+            "lines": [
+              3,
+              4,
+              5,
+              6,
+              7,
+              8,
+              9,
+              10
+            ],
+            "starting_column": 1,
+            "ending_column": 2
+          }
+        }
+      },
+      {
+        "type": "function",
+        "name": "transferFrom",
+        "source_mapping": {
+          "start": 162,
+          "length": 69,
+          "filename_used": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
+          "filename_relative": "tests/incorrect_erc20_interface.sol",
+          "filename_absolute": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
+          "filename_short": "tests/incorrect_erc20_interface.sol",
+          "lines": [
+            6
+          ],
+          "starting_column": 5,
+          "ending_column": 74
+        },
+        "contract": {
+          "type": "contract",
+          "name": "Token",
+          "source_mapping": {
+            "start": 26,
+            "length": 355,
            "filename_used": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
            "filename_relative": "tests/incorrect_erc20_interface.sol",
            "filename_absolute": "/home/travis/build/crytic/slither/tests/incorrect_erc20_interface.sol",
@ -36,7 +241,10 @@
              4,
              5,
              6,
-              7
+              7,
+              8,
+              9,
+              10
            ],
            "starting_column": 1,
            "ending_column": 2
--- a/tests/expected_json/incorrect_erc20_interface.erc20-interface.txt
+++ b/tests/expected_json/incorrect_erc20_interface.erc20-interface.txt
@ -1,5 +1,10 @@
 INFO:Detectors:[93m
-Token (tests/incorrect_erc20_interface.sol#3-7) has incorrect ERC20 function interface(s):
-	-transfer (tests/incorrect_erc20_interface.sol#5)
+Token (tests/incorrect_erc20_interface.sol#3-10) has incorrect ERC20 function interface(s):
+	-transfer (tests/incorrect_erc20_interface.sol#4)
+	-approve (tests/incorrect_erc20_interface.sol#5)
+	-transferFrom (tests/incorrect_erc20_interface.sol#6)
+	-totalSupply (tests/incorrect_erc20_interface.sol#7)
+	-balanceOf (tests/incorrect_erc20_interface.sol#8)
+	-allowance (tests/incorrect_erc20_interface.sol#9)
 Reference: https://github.com/crytic/slither/wiki/Detector-Documentation#incorrect-erc20-interface[0m
 INFO:Slither:tests/incorrect_erc20_interface.sol analyzed (1 contracts), 1 result(s) found
--- a/tests/expected_json/incorrect_erc721_interface.erc721-interface.json
+++ b/tests/expected_json/incorrect_erc721_interface.erc721-interface.json
@ -0,0 +1,442 @@
+[
+  {
+    "check": "erc721-interface",
+    "impact": "Medium",
+    "confidence": "High",
+    "description": "Token (tests/incorrect_erc721_interface.sol#6-16) has incorrect ERC721 function interface(s):\n\t-supportsInterface (tests/incorrect_erc721_interface.sol#4)\n\t-balanceOf (tests/incorrect_erc721_interface.sol#7)\n\t-ownerOf (tests/incorrect_erc721_interface.sol#8)\n\t-safeTransferFrom (tests/incorrect_erc721_interface.sol#9)\n\t-safeTransferFrom (tests/incorrect_erc721_interface.sol#10)\n\t-transferFrom (tests/incorrect_erc721_interface.sol#11)\n\t-approve (tests/incorrect_erc721_interface.sol#12)\n\t-setApprovalForAll (tests/incorrect_erc721_interface.sol#13)\n\t-getApproved (tests/incorrect_erc721_interface.sol#14)\n\t-isApprovedForAll (tests/incorrect_erc721_interface.sol#15)\n",
+    "elements": [
+      {
+        "type": "function",
+        "name": "approve",
+        "source_mapping": {
+          "start": 549,
+          "length": 78,
+          "filename_used": "/home/travis/build/crytic/slither/tests/incorrect_erc721_interface.sol",
+          "filename_relative": "tests/incorrect_erc721_interface.sol",
+          "filename_absolute": "/home/travis/build/crytic/slither/tests/incorrect_erc721_interface.sol",
+          "filename_short": "tests/incorrect_erc721_interface.sol",
+          "lines": [
+            12
+          ],
+          "starting_column": 5,
+          "ending_column": 83
+        },
+        "contract": {
+          "type": "contract",
+          "name": "Token",
+          "source_mapping": {
+            "start": 109,
+            "length": 739,
+            "filename_used": "/home/travis/build/crytic/slither/tests/incorrect_erc721_interface.sol",
+            "filename_relative": "tests/incorrect_erc721_interface.sol",
+            "filename_absolute": "/home/travis/build/crytic/slither/tests/incorrect_erc721_interface.sol",
+            "filename_short": "tests/incorrect_erc721_interface.sol",
+            "lines": [
+              6,
+              7,
+              8,
+              9,
+              10,
+              11,
+              12,
+              13,
+              14,
+              15,
+              16
+            ],
+            "starting_column": 1,
+            "ending_column": 2
+          }
+        }
+      },
+      {
+        "type": "function",
+        "name": "balanceOf",
+        "source_mapping": {
+          "start": 140,
+          "length": 44,
+          "filename_used": "/home/travis/build/crytic/slither/tests/incorrect_erc721_interface.sol",
+          "filename_relative": "tests/incorrect_erc721_interface.sol",
+          "filename_absolute": "/home/travis/build/crytic/slither/tests/incorrect_erc721_interface.sol",
+          "filename_short": "tests/incorrect_erc721_interface.sol",
+          "lines": [
+            7
+          ],
+          "starting_column": 5,
+          "ending_column": 49
+        },
+        "contract": {
+          "type": "contract",
+          "name": "Token",
+          "source_mapping": {
+            "start": 109,
+            "length": 739,
+            "filename_used": "/home/travis/build/crytic/slither/tests/incorrect_erc721_interface.sol",
+            "filename_relative": "tests/incorrect_erc721_interface.sol",
+            "filename_absolute": "/home/travis/build/crytic/slither/tests/incorrect_erc721_interface.sol",
+            "filename_short": "tests/incorrect_erc721_interface.sol",
+            "lines": [
+              6,
+              7,
+              8,
+              9,
+              10,
+              11,
+              12,
+              13,
+              14,
+              15,
+              16
+            ],
+            "starting_column": 1,
+            "ending_column": 2
+          }
+        }
+      },
+      {
+        "type": "function",
+        "name": "getApproved",
+        "source_mapping": {
+          "start": 723,
+          "length": 48,
+          "filename_used": "/home/travis/build/crytic/slither/tests/incorrect_erc721_interface.sol",
+          "filename_relative": "tests/incorrect_erc721_interface.sol",
+          "filename_absolute": "/home/travis/build/crytic/slither/tests/incorrect_erc721_interface.sol",
+          "filename_short": "tests/incorrect_erc721_interface.sol",
+          "lines": [
+            14
+          ],
+          "starting_column": 5,
+          "ending_column": 53
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+          "length": 56,
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+          ],
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+          "ending_column": 61
+        },
+        "contract": {
+          "type": "contract",
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+          "source_mapping": {
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+            "length": 82,
+            "filename_used": "/home/travis/build/crytic/slither/tests/incorrect_erc721_interface.sol",
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+            "filename_absolute": "/home/travis/build/crytic/slither/tests/incorrect_erc721_interface.sol",
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+            "lines": [
+              3,
+              4,
+              5
+            ],
+            "starting_column": 1,
+            "ending_column": 2
+          }
+        }
+      },
+      {
+        "type": "function",
+        "name": "transferFrom",
+        "source_mapping": {
+          "start": 452,
+          "length": 92,
+          "filename_used": "/home/travis/build/crytic/slither/tests/incorrect_erc721_interface.sol",
+          "filename_relative": "tests/incorrect_erc721_interface.sol",
+          "filename_absolute": "/home/travis/build/crytic/slither/tests/incorrect_erc721_interface.sol",
+          "filename_short": "tests/incorrect_erc721_interface.sol",
+          "lines": [
+            11
+          ],
+          "starting_column": 5,
+          "ending_column": 97
+        },
+        "contract": {
+          "type": "contract",
+          "name": "Token",
+          "source_mapping": {
+            "start": 109,
+            "length": 739,
+            "filename_used": "/home/travis/build/crytic/slither/tests/incorrect_erc721_interface.sol",
+            "filename_relative": "tests/incorrect_erc721_interface.sol",
+            "filename_absolute": "/home/travis/build/crytic/slither/tests/incorrect_erc721_interface.sol",
+            "filename_short": "tests/incorrect_erc721_interface.sol",
+            "lines": [
+              6,
+              7,
+              8,
+              9,
+              10,
+              11,
+              12,
+              13,
+              14,
+              15,
+              16
+            ],
+            "starting_column": 1,
+            "ending_column": 2
+          }
+        }
+      }
+    ]
+  }
+]
--- a/tests/expected_json/incorrect_erc721_interface.erc721-interface.txt
+++ b/tests/expected_json/incorrect_erc721_interface.erc721-interface.txt
@ -0,0 +1,14 @@
+INFO:Detectors:[93m
+Token (tests/incorrect_erc721_interface.sol#6-16) has incorrect ERC721 function interface(s):
+	-supportsInterface (tests/incorrect_erc721_interface.sol#4)
+	-balanceOf (tests/incorrect_erc721_interface.sol#7)
+	-ownerOf (tests/incorrect_erc721_interface.sol#8)
+	-safeTransferFrom (tests/incorrect_erc721_interface.sol#9)
+	-safeTransferFrom (tests/incorrect_erc721_interface.sol#10)
+	-transferFrom (tests/incorrect_erc721_interface.sol#11)
+	-approve (tests/incorrect_erc721_interface.sol#12)
+	-setApprovalForAll (tests/incorrect_erc721_interface.sol#13)
+	-getApproved (tests/incorrect_erc721_interface.sol#14)
+	-isApprovedForAll (tests/incorrect_erc721_interface.sol#15)
+Reference: https://github.com/crytic/slither/wiki/Detector-Documentation#incorrect-erc721-interface[0m
+INFO:Slither:tests/incorrect_erc721_interface.sol analyzed (2 contracts), 1 result(s) found
--- a/tests/incorrect_erc20_interface.sol
+++ b/tests/incorrect_erc20_interface.sol
@ -1,7 +1,10 @@
 pragma solidity ^0.4.24;

 contract Token{
-
    function transfer(address to, uint value) external;
-
+    function approve(address spender, uint value) external;
+    function transferFrom(address from, address to, uint value) external;
+    function totalSupply() external;
+    function balanceOf(address who) external;
+    function allowance(address owner, address spender) external;
 }
--- a/tests/incorrect_erc721_interface.sol
+++ b/tests/incorrect_erc721_interface.sol
@ -0,0 +1,16 @@
+pragma solidity ^0.4.24;
+
+interface IERC165 {
+    function supportsInterface(bytes4 interfaceID) external;
+}
+contract Token is IERC165{
+    function balanceOf(address _owner) external;
+    function ownerOf(uint256 _tokenId) external;
+    function safeTransferFrom(address _from, address _to, uint256 _tokenId, bytes data) external returns (bool);
+    function safeTransferFrom(address _from, address _to, uint256 _tokenId) external returns (bool);
+    function transferFrom(address _from, address _to, uint256 _tokenId) external returns (bool);
+    function approve(address _approved, uint256 _tokenId) external returns (bool);
+    function setApprovalForAll(address _operator, bool _approved) external returns (bool);
+    function getApproved(uint256 _tokenId) external;
+    function isApprovedForAll(address _owner, address _operator) external;
+}