Merge pull request #1418 from poanetwork/ab-pass-external-librarie-to-solidity-compiler

pass external libraries to the Solidity compiler

apps/explorer/lib/explorer/smart_contract/solidity/code_compiler.ex

@@ -61,6 +61,8 @@ defmodule Explorer.SmartContract.Solidity.CodeCompiler do
       }
   """
   def run(name, compiler_version, code, optimize, external_libs \\ %{}) do
+    external_libs_string = Jason.encode!(external_libs)
+
     {response, _status} =
       System.cmd(
         "node",
@@ -69,16 +71,15 @@ defmodule Explorer.SmartContract.Solidity.CodeCompiler do
           code,
           compiler_version,
           optimize_value(optimize),
-          @new_contract_name
+          @new_contract_name,
+          external_libs_string
         ]
       )
 
     with {:ok, contracts} <- Jason.decode(response),
          %{"abi" => abi, "evm" => %{"deployedBytecode" => %{"object" => bytecode}}} <-
            get_contract_info(contracts, name) do
-      bytecode_with_libraries = add_library_addresses(bytecode, external_libs)
+      {:ok, %{"abi" => abi, "bytecode" => bytecode, "name" => name}}
-
-      {:ok, %{"abi" => abi, "bytecode" => bytecode_with_libraries, "name" => name}}
     else
       {:error, %Jason.DecodeError{}} ->
         {:error, :compilation}
@@ -105,16 +106,6 @@ defmodule Explorer.SmartContract.Solidity.CodeCompiler do
     end
   end
 
-  defp add_library_addresses(bytecode, external_libs) do
-    Enum.reduce(external_libs, bytecode, fn {library_name, address}, acc ->
-      placeholder = String.replace(@new_contract_name, ".", "\.") <> ":" <> library_name
-      regex = Regex.compile!("_+#{placeholder}_+")
-      address = String.replace(address, "0x", "")
-
-      String.replace(acc, regex, address)
-    end)
-  end
-
   def parse_error(%{"error" => error}), do: {:error, [error]}
   def parse_error(%{"errors" => errors}), do: {:error, errors}
   def parse_error({:error, _} = error), do: error

apps/explorer/priv/compile_solc.js

@@ -6,6 +6,7 @@ var sourceCode = process.argv[2];
 var version = process.argv[3];
 var optimize = process.argv[4];
 var newContractName = process.argv[5];
+var externalLibraries = JSON.parse(process.argv[6])
 
 var compiled_code = solc.loadRemoteVersion(version, function (err, solcSnapshot) {
   if (err) {
@@ -24,6 +25,9 @@ var compiled_code = solc.loadRemoteVersion(version, function (err, solcSnapshot)
           enabled: optimize == '1',
           runs: 200
         },
+        libraries: {
+          [newContractName]: externalLibraries
+        },
         outputSelection: {
           '*': {
             '*': ['*']