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Çekim #7

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eb75977
Merge pull request #4 from sourcifyeth/change-vyper-version-source
kuzdogan Aug 13, 2025
bc23687
Use the new Util "Import From Etherscan" in lib-sourcify
marcocastignoli Aug 26, 2025
dfd9b3b
Merge pull request #5 from sourcifyeth/fix-import-from-etherscan
marcocastignoli Aug 26, 2025
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288 changes: 59 additions & 229 deletions app/utils/etherscanApi.ts
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Original file line number Diff line number Diff line change
@@ -1,253 +1,83 @@
import type { Language, VerificationMethod } from "../types/verification";
import type { VyperVersion } from "../contexts/CompilerVersionsContext";
import type { SolidityCompilerSettings, VyperCompilerSettings } from "./sourcifyApi";
import {
EtherscanUtils,
EtherscanImportError,
type EtherscanResult,
type ProcessedEtherscanResult,
} from "@ethereum-sourcify/lib-sourcify";

// Function to convert Vyper short version to long version using pre-loaded versions
export const getVyperLongVersionFromList = (shortVersion: string, vyperVersions: VyperVersion[]): string => {
const foundVersion = vyperVersions.find((version) => version.version === shortVersion);
export const getVyperLongVersionFromList = (
shortVersion: string,
vyperVersions: VyperVersion[]
): string => {
const foundVersion = vyperVersions.find(
(version) => version.version === shortVersion
);
return foundVersion ? foundVersion.longVersion : shortVersion;
};

// Helper function to generate compiler settings from Etherscan result
const generateCompilerSettings = (
language: Language,
etherscanResult: EtherscanResult
): SolidityCompilerSettings | VyperCompilerSettings => {
if (language === "solidity") {
const settings: SolidityCompilerSettings = {
optimizerEnabled: etherscanResult.OptimizationUsed === "1",
optimizerRuns: parseInt(etherscanResult.Runs),
};

// Only include evmVersion if it's not "default"
if (etherscanResult.EVMVersion.toLowerCase() !== "default") {
settings.evmVersion = etherscanResult.EVMVersion;
}

return settings;
} else {
// For Vyper, no optimization settings
const settings: VyperCompilerSettings = {};

// Only include evmVersion if it's not "default"
if (etherscanResult.EVMVersion.toLowerCase() !== "default") {
settings.evmVersion = etherscanResult.EVMVersion;
}

return settings;
}
};

export interface EtherscanResult {
SourceCode: string;
ABI: string;
ContractName: string;
CompilerVersion: string;
OptimizationUsed: string;
Runs: string;
ConstructorArguments: string;
EVMVersion: string;
Library: string;
LicenseType: string;
Proxy: string;
Implementation: string;
SwarmSource: string;
ContractFileName?: string;
}

export interface ProcessedEtherscanResult {
language: Language;
verificationMethod: VerificationMethod;
compilerVersion: string;
contractName: string;
contractPath: string;
files: File[];
compilerSettings?: SolidityCompilerSettings | VyperCompilerSettings;
}

export interface ProcessEtherscanOptions {
vyperVersions?: VyperVersion[];
}

export const isEtherscanJsonInput = (sourceCodeObject: string): boolean => {
return sourceCodeObject.startsWith("{{");
};

export const isEtherscanMultipleFilesObject = (sourceCodeObject: string): boolean => {
try {
return Object.keys(JSON.parse(sourceCodeObject)).length > 0;
} catch (e) {
return false;
}
};

export const parseEtherscanJsonInput = (sourceCodeObject: string) => {
// Etherscan wraps the json object: {{ ... }}
return JSON.parse(sourceCodeObject.slice(1, -1));
};

export const isVyperResult = (etherscanResult: EtherscanResult): boolean => {
return etherscanResult.CompilerVersion.startsWith("vyper");
};

export const getContractPathFromSoliditySources = (contractName: string, sources: any): string | undefined => {
// Look for a file that contains the contract definition
for (const [filePath, source] of Object.entries(sources)) {
const content = typeof source === "string" ? source : (source as any).content;
if (content && typeof content === "string") {
// Look for contract definition in the file
const contractRegex = new RegExp(`contract\\s+${contractName}\\s*[\\s\\S]*?\\{`, "g");
const interfaceRegex = new RegExp(`interface\\s+${contractName}\\s*[\\s\\S]*?\\{`, "g");
const libraryRegex = new RegExp(`library\\s+${contractName}\\s*[\\s\\S]*?\\{`, "g");

if (contractRegex.test(content) || interfaceRegex.test(content) || libraryRegex.test(content)) {
return filePath;
}
}
}
return undefined;
};

export const fetchFromEtherscan = async (
chainId: string,
address: string,
apiKey: string
apiKey: string = ""
): Promise<EtherscanResult> => {
const url = `https://api.etherscan.io/v2/api?chainid=${chainId}&module=contract&action=getsourcecode&address=${address}&apikey=${apiKey}`;

let response: Response;

try {
response = await fetch(url);
return await EtherscanUtils.fetchFromEtherscan(chainId, address, apiKey);
} catch (error) {
throw new Error(`Network error: Failed to connect to Etherscan API`);
}

if (!response.ok) {
throw new Error(`Etherscan API responded with status ${response.status}`);
}

const resultJson = await response.json();

if (resultJson.message === "NOTOK" && resultJson.result.includes("rate limit reached")) {
throw new Error("Etherscan API rate limit reached, please try again later");
}

if (resultJson.message === "NOTOK") {
throw new Error(`Etherscan API error: ${resultJson.result}`);
}

if (resultJson.result[0].SourceCode === "") {
throw new Error("This contract is not verified on Etherscan");
if (error instanceof EtherscanImportError) {
// Convert EtherscanImportError to regular Error for compatibility
switch (error.code) {
case "etherscan_network_error":
throw new Error("Network error: Failed to connect to Etherscan API");
case "etherscan_http_error":
throw new Error(
`Etherscan API responded with status ${(error as any).status}`
);
case "etherscan_rate_limit":
throw new Error(
"Etherscan API rate limit reached, please try again later"
);
case "etherscan_api_error":
throw new Error(
`Etherscan API error: ${(error as any).apiErrorMessage}`
);
case "etherscan_not_verified":
throw new Error("This contract is not verified on Etherscan");
default:
throw new Error(`Etherscan error: ${error.message}`);
}
}
throw error;
}

return resultJson.result[0] as EtherscanResult;
};

export const processEtherscanResult = async (
etherscanResult: EtherscanResult,
options: ProcessEtherscanOptions = {}
etherscanResult: EtherscanResult
): Promise<ProcessedEtherscanResult> => {
const sourceCodeObject = etherscanResult.SourceCode;
const contractName = etherscanResult.ContractName;

// Determine language
const language: Language = isVyperResult(etherscanResult) ? "vyper" : "solidity";

// Process compiler version
let compilerVersion = etherscanResult.CompilerVersion;

if (compilerVersion.startsWith("vyper:")) {
const shortVersion = compilerVersion.slice(6);
// Convert short version to long version for Vyper using pre-loaded versions
if (options.vyperVersions) {
compilerVersion = getVyperLongVersionFromList(shortVersion, options.vyperVersions);
} else {
// Fallback to short version if no versions provided
compilerVersion = shortVersion;
}
} else if (compilerVersion.charAt(0) === "v") {
compilerVersion = compilerVersion.slice(1);
}

let verificationMethod: VerificationMethod;
let files: File[] = [];
let contractPath: string;
let compilerSettings: SolidityCompilerSettings | VyperCompilerSettings | undefined;

// Determine verification method and create files
if (isEtherscanJsonInput(sourceCodeObject)) {
// std-json method - compiler settings are already in the JSON input
verificationMethod = "std-json";
const jsonInput = parseEtherscanJsonInput(sourceCodeObject);
try {
let processedResult;

// Use ContractFileName if available, otherwise search in sources
if (etherscanResult.ContractFileName) {
contractPath = etherscanResult.ContractFileName;
if (EtherscanUtils.isVyperResult(etherscanResult)) {
processedResult = await EtherscanUtils.processVyperResultFromEtherscan(
etherscanResult
);
} else {
const foundPath = getContractPathFromSoliditySources(contractName, jsonInput.sources);
if (!foundPath) {
throw new Error("Could not find contract path in sources");
}
contractPath = foundPath;
processedResult =
EtherscanUtils.processSolidityResultFromEtherscan(etherscanResult);
}

// Create a single JSON file
const jsonContent = JSON.stringify(jsonInput, null, 2);
const jsonFile = new File([jsonContent], `${contractName}-input.json`, { type: "application/json" });
files = [jsonFile];

// For std-json, we don't generate compiler settings since they're in the JSON input
// compilerSettings will be undefined
} else if (isEtherscanMultipleFilesObject(sourceCodeObject)) {
// multiple-files method
verificationMethod = "multiple-files";
const sourcesObject = JSON.parse(sourceCodeObject) as { [key: string]: { content: string } };

// Use ContractFileName if available, otherwise search in sources
if (etherscanResult.ContractFileName) {
contractPath = etherscanResult.ContractFileName;
} else {
const foundPath = getContractPathFromSoliditySources(contractName, sourcesObject);
if (!foundPath) {
throw new Error("Could not find contract path in sources");
}
contractPath = foundPath;
}

// Create files from sources object
files = Object.entries(sourcesObject).map(([filename, object]) => {
return new File([object.content as string], filename, { type: "text/plain" });
});

// Generate compiler settings for multiple-files method
compilerSettings = generateCompilerSettings(language, etherscanResult);
} else {
// single-file method
verificationMethod = "single-file";
const extension = language === "vyper" ? "vy" : "sol";

// Use ContractFileName if available, otherwise construct filename
if (etherscanResult.ContractFileName) {
contractPath = etherscanResult.ContractFileName;
} else {
contractPath = `${contractName}.${extension}`;
return {
compilerVersion: processedResult.compilerVersion,
contractName: processedResult.contractName,
contractPath: processedResult.contractPath,
jsonInput: processedResult.jsonInput,
};
} catch (error) {
if (error instanceof EtherscanImportError) {
// Convert EtherscanImportError to regular Error for compatibility
throw new Error(error.message);
}

const sourceFile = new File([sourceCodeObject], contractPath, { type: "text/plain" });
files = [sourceFile];

// Generate compiler settings for single-file method
compilerSettings = generateCompilerSettings(language, etherscanResult);
throw error;
}

return {
language,
verificationMethod,
compilerVersion,
contractName,
contractPath,
files,
compilerSettings,
};
};
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