81 lines
2.4 KiB
TypeScript
81 lines
2.4 KiB
TypeScript
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const BASE58_VALUE = /^[1-9A-HJ-NP-Za-km-z]{32,64}$/;
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export type SolRpcTestResult = {
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ok: boolean;
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latencyMs: number;
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slot?: number;
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blockhash?: string;
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lastValidBlockHeight?: number;
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error?: string;
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};
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type RpcFetch = (input: string | URL | Request, init?: RequestInit) => Promise<Response>;
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export async function testSolRpcEndpoint(
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endpoint: string,
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timeoutMs = 10_000,
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fetchImpl: RpcFetch = fetch,
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): Promise<SolRpcTestResult> {
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const startedAt = performance.now();
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const controller = new AbortController();
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const timeout = setTimeout(() => controller.abort(), timeoutMs);
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try {
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const response = await fetchImpl(endpoint, {
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method: "POST",
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headers: { "Content-Type": "application/json" },
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body: JSON.stringify({
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jsonrpc: "2.0",
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id: 1,
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method: "getLatestBlockhash",
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params: [{ commitment: "confirmed" }],
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}),
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signal: controller.signal,
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});
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if (!response.ok) {
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throw new Error(`HTTP ${response.status}${response.statusText ? ` ${response.statusText}` : ""}`);
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}
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let data: any;
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try {
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data = await response.json();
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} catch {
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throw new Error("Response was not valid JSON");
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}
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if (data?.error) {
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const detail = typeof data.error.message === "string" ? data.error.message : "RPC returned an error";
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throw new Error(detail);
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}
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const slot = data?.result?.context?.slot;
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const blockhash = data?.result?.value?.blockhash;
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const lastValidBlockHeight = data?.result?.value?.lastValidBlockHeight;
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if (!Number.isSafeInteger(slot) || slot < 0) throw new Error("Response contained an invalid slot");
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if (typeof blockhash !== "string" || !BASE58_VALUE.test(blockhash)) {
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throw new Error("Response contained an invalid blockhash");
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}
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if (!Number.isSafeInteger(lastValidBlockHeight) || lastValidBlockHeight < 0) {
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throw new Error("Response contained an invalid last valid block height");
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}
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return {
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ok: true,
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latencyMs: Math.round(performance.now() - startedAt),
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slot,
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blockhash,
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lastValidBlockHeight,
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};
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} catch (error: any) {
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const timedOut = controller.signal.aborted;
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return {
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ok: false,
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latencyMs: Math.round(performance.now() - startedAt),
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error: timedOut ? `Timed out after ${timeoutMs}ms` : (error?.message || "RPC request failed"),
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};
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} finally {
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clearTimeout(timeout);
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}
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}
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