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55 lines
1.7 KiB
55 lines
1.7 KiB
4 years ago
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import getFetchWithTimeout from './fetch-with-timeout';
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const fetchWithTimeout = getFetchWithTimeout(30000);
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/**
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* Makes a JSON RPC request to the given URL, with the given RPC method and params.
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*
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* @param {string} rpcUrl - The RPC endpoint URL to target.
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* @param {string} rpcMethod - The RPC method to request.
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* @param {Array<unknown>} [rpcParams] - The RPC method params.
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* @returns {Promise<unknown|undefined>} Returns the result of the RPC method call,
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* or throws an error in case of failure.
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*/
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export async function jsonRpcRequest(rpcUrl, rpcMethod, rpcParams = []) {
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let fetchUrl = rpcUrl;
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const headers = {
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'Content-Type': 'application/json',
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};
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// Convert basic auth URL component to Authorization header
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const { origin, pathname, username, password, search } = new URL(rpcUrl);
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// URLs containing username and password needs special processing
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if (username && password) {
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const encodedAuth = Buffer.from(`${username}:${password}`).toString(
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'base64',
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);
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headers.Authorization = `Basic ${encodedAuth}`;
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fetchUrl = `${origin}${pathname}${search}`;
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}
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const jsonRpcResponse = await fetchWithTimeout(fetchUrl, {
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method: 'POST',
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body: JSON.stringify({
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id: Date.now().toString(),
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jsonrpc: '2.0',
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method: rpcMethod,
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params: rpcParams,
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}),
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headers,
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cache: 'default',
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}).then((httpResponse) => httpResponse.json());
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if (
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!jsonRpcResponse ||
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Array.isArray(jsonRpcResponse) ||
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typeof jsonRpcResponse !== 'object'
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) {
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throw new Error(`RPC endpoint ${rpcUrl} returned non-object response.`);
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}
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const { error, result } = jsonRpcResponse;
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if (error) {
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throw new Error(error?.message || error);
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}
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return result;
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}
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