Solidity compiler version missing

[karalabe]

One of the most important features is the ability to verify deployed contracts. However mist does not display the Solidity compiler version it uses to deploy a contract, so afterwards it's extremely hard to guess which version it was and have the contract verified by block explorers. I think we should definitely have the version number displayed when working with solidity code directly.

[evertonfraga]

Hi @karalabe, how exactly would be the best way to display Solidity version?

Only a small text around the editor would suffice? Or embed this information alongside with the contract, in some way?

[luclu]

@evertonfraga I guess while the former is be the way to go, embedding it in some standardized way would be required. Is there some EIP on this? Is there a meta-data section within contracts?

To accomplish the former we might want to use the compiler version key-value pair from the resulting web3.eth.compile.solidity() object (compileContract.js#L162) to be node agnostic:

var testSource='contract Test {  function double(int a) constant returns(int) { return 2*a; } }'
var testCompiled = web3.eth.compile.solidity(testSource);
console.log(testCompiled)

{ Test: 
   { code: '0x6060604052602a8060106000396000f3606060405260e060020a60003504636ffa1caa8114601a575b005b6002600435026060908152602090f3',
     info: 
      { source: 'contract Test {  function double(int a) constant returns(int) { return 2*a; } }',
        language: 'Solidity',
        languageVersion: '0.3.6',
        compilerVersion: '0.3.6',
        compilerOptions: '--bin --abi --userdoc --devdoc --add-std --optimize -o /var/folders/1r/vtmg53tn17g9m35zd64lyczh0000gn/T/solc777625456',
        abiDefinition: [Object],
        userDoc: [Object],
        developerDoc: [Object] } } }