Add support for contracts with unlinked libraries when publishing sources

CHANGELOG.md

@@ -6,6 +6,7 @@ This changelog format is based on [Keep a Changelog](https://keepachangelog.com/
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased](https://github.com/eth-brownie/brownie)
+- Support the validation of contracts that include unlinked libraries
 
 ## [1.19.2](https://github.com/eth-brownie/brownie/tree/v1.19.2) - 2022-10-16
 ### Added

brownie/network/contract.py

@@ -425,13 +425,17 @@ def publish_source(self, contract: Any, silent: bool = False) -> bool:
         else:
             constructor_arguments = ""
 
+        standard_input_json_with_libraries = self._flatten_libraries_for_file(
+            self._flattener.standard_input_json
+        )
+
         # Submit verification
         payload_verification: Dict = {
             "apikey": api_key,
             "module": "contract",
             "action": "verifysourcecode",
             "contractaddress": address,
-            "sourceCode": io.StringIO(json.dumps(self._flattener.standard_input_json)),
+            "sourceCode": io.StringIO(json.dumps(standard_input_json_with_libraries)),
             "codeformat": "solidity-standard-json-input",
             "contractname": f"{self._flattener.contract_file}:{self._flattener.contract_name}",
             "compilerversion": f"v{contract_info['compiler_version']}",
@@ -502,6 +506,36 @@ def _slice_source(self, source: str, offset: list) -> str:
         offset_start = max(0, offset_start)
         return source[offset_start : offset[1]].strip()
 
+    def _get_stripped_library(self, library_source_name, sources):
+        library_source = sources[library_source_name]["content"].split("\n")
+        lines = []
+        for line in library_source:
+            if "pragma" in line:
+                continue
+            if "license" in line.lower():
+                continue
+            lines.append(line)
+        return "\n".join(lines)
+
+    def _flatten_libraries_for_file(self, standard_validation_json):
+        sources = standard_validation_json["sources"]
+        libraries = standard_validation_json["settings"]["libraries"]
+        files_requiring_libraries = list(libraries.keys())
+        file_to_flatten = files_requiring_libraries[0]
+        libraries_files = [name.replace(".sol", "") + ".sol" for name in libraries[file_to_flatten]]
+        processed_lines = []
+        contract_source = sources[file_to_flatten]["content"].split("\n")
+        for line in contract_source:
+            if "import" in line and any(file_name in line for file_name in libraries_files):
+                file_name = [name for name in libraries_files if name in line][0]
+                line = self._get_stripped_library(file_name, sources)
+            processed_lines.append(line)
+        new_source = "\n".join(processed_lines)
+        standard_validation_json["sources"][file_to_flatten] = {"content": new_source}
+        for library_name in libraries_files:
+            standard_validation_json["sources"].pop(library_name)
+        return standard_validation_json
+
 
 class ContractConstructor: