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56 lines
2.4 KiB
56 lines
2.4 KiB
6 years ago
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import re
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class FormatSolcVersion:
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# Indicates the recommended versions for replacement
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REPLACEMENT_VERSIONS = ["0.4.25", "0.5.3"]
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# group:
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# 0: ^ > >= < <= (optional)
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# 1: ' ' (optional)
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# 2: version number
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# 3: version number
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# 4: version number
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PATTERN = re.compile('(\^|>|>=|<|<=)?([ ]+)?(\d+)\.(\d+)\.(\d+)')
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@staticmethod
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def format(slither, patches, elements):
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for element in elements:
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solc_version_replace = FormatSolcVersion.determine_solc_version_replacement(element['expression'])
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FormatSolcVersion.create_patch(slither, patches, element['source_mapping']['filename'], solc_version_replace, element['source_mapping']['start'], element['source_mapping']['start'] + element['source_mapping']['length'])
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@staticmethod
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def determine_solc_version_replacement(used_solc_version):
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versions = FormatSolcVersion.PATTERN.findall(used_solc_version)
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if len(versions) == 1:
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version = versions[0]
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minor_version = '.'.join(version[2:])[2]
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if minor_version == '4':
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return "pragma solidity " + FormatSolcVersion.REPLACEMENT_VERSIONS[0] + ';'
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elif minor_version == '5':
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return "pragma solidity " + FormatSolcVersion.REPLACEMENT_VERSIONS[1] + ';'
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else:
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print("Unknown version!")
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sys.exit(-1)
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elif len(versions) == 2:
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version_left = versions[0]
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version_right = versions[1]
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minor_version_left = '.'.join(version_left[2:])[2]
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minor_version_right = '.'.join(version_right[2:])[2]
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if minor_version_right == '4':
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return "pragma solidity " + FormatSolcVersion.REPLACEMENT_VERSIONS[0] + ';'
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elif minor_version_right in ['5','6']:
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return "pragma solidity " + FormatSolcVersion.REPLACEMENT_VERSIONS[1] + ';'
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@staticmethod
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def create_patch(slither, patches, in_file, solc_version, modify_loc_start, modify_loc_end):
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in_file_str = slither.source_code[in_file]
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old_str_of_interest = in_file_str[modify_loc_start:modify_loc_end]
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patches[in_file].append({
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"detector" : "solc-version",
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"start" : modify_loc_start,
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"end" : modify_loc_end,
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"old_string" : old_str_of_interest,
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"new_string" : solc_version
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})
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