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Merge pull request #4337 from ethereum/compilerstack-cleanup

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Pull out createCBORMetadata helper
This commit is contained in:
Alex Beregszaszi 2018-06-25 23:44:47 +02:00 committed by GitHub
commit 3b1741909c
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2 changed files with 31 additions and 21 deletions
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50
libsolidity/interface/CompilerStack.cpp
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@ -719,27 +719,10 @@ void CompilerStack::compileContract(
string metadata = createMetadata(compiledContract);
compiledContract.metadata = metadata;
// Prepare CBOR metadata for the bytecode
bytes cborEncodedHash =
// CBOR-encoding of the key "bzzr0"
bytes{0x65, 'b', 'z', 'z', 'r', '0'}+
// CBOR-encoding of the hash
bytes{0x58, 0x20} + dev::swarmHash(metadata).asBytes();
bytes cborEncodedMetadata;
if (onlySafeExperimentalFeaturesActivated(_contract.sourceUnit().annotation().experimentalFeatures))
cborEncodedMetadata =
// CBOR-encoding of {"bzzr0": dev::swarmHash(metadata)}
bytes{0xa1} +
cborEncodedHash;
else
cborEncodedMetadata =
// CBOR-encoding of {"bzzr0": dev::swarmHash(metadata), "experimental": true}
bytes{0xa2} +
cborEncodedHash +
bytes{0x6c, 'e', 'x', 'p', 'e', 'r', 'i', 'm', 'e', 'n', 't', 'a', 'l', 0xf5};
solAssert(cborEncodedMetadata.size() <= 0xffff, "Metadata too large");
// 16-bit big endian length
cborEncodedMetadata += toCompactBigEndian(cborEncodedMetadata.size(), 2);
bytes cborEncodedMetadata = createCBORMetadata(
metadata,
!onlySafeExperimentalFeaturesActivated(_contract.sourceUnit().annotation().experimentalFeatures)
);
try
{
@ -901,6 +884,31 @@ string CompilerStack::createMetadata(Contract const& _contract) const
return jsonCompactPrint(meta);
}
bytes CompilerStack::createCBORMetadata(string _metadata, bool _experimentalMode)
{
bytes cborEncodedHash =
// CBOR-encoding of the key "bzzr0"
bytes{0x65, 'b', 'z', 'z', 'r', '0'}+
// CBOR-encoding of the hash
bytes{0x58, 0x20} + dev::swarmHash(_metadata).asBytes();
bytes cborEncodedMetadata;
if (_experimentalMode)
cborEncodedMetadata =
// CBOR-encoding of {"bzzr0": dev::swarmHash(metadata), "experimental": true}
bytes{0xa2} +
cborEncodedHash +
bytes{0x6c, 'e', 'x', 'p', 'e', 'r', 'i', 'm', 'e', 'n', 't', 'a', 'l', 0xf5};
else
cborEncodedMetadata =
// CBOR-encoding of {"bzzr0": dev::swarmHash(metadata)}
bytes{0xa1} +
cborEncodedHash;
solAssert(cborEncodedMetadata.size() <= 0xffff, "Metadata too large");
// 16-bit big endian length
cborEncodedMetadata += toCompactBigEndian(cborEncodedMetadata.size(), 2);
return cborEncodedMetadata;
}
string CompilerStack::computeSourceMapping(eth::AssemblyItems const& _items) const
{
string ret;

2
libsolidity/interface/CompilerStack.h
View File

@ -295,6 +295,8 @@ private:
ContractDefinition const& contractDefinition(std::string const& _contractName) const;
std::string createMetadata(Contract const& _contract) const;
/// @returns the metadata CBOR for the given serialised metadata JSON.
static bytes createCBORMetadata(std::string _metadata, bool _experimentalMode);
std::string computeSourceMapping(eth::AssemblyItems const& _items) const;
Json::Value const& contractABI(Contract const&) const;
Json::Value const& natspecUser(Contract const&) const;