Skip to content

improve(SDKProvider): Retry when getBlockTime(slot) returns null #1236

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 2 commits into from
Sep 30, 2025
Merged

improve(SDKProvider): Retry when getBlockTime(slot) returns null #1236

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
36b0fe5
improve(SDKProvider): Retry when `getBlockTime(slot)` returns null
nicholaspai Sep 22, 2025
2c105a8
Update SpokeUtils.ts
nicholaspai Sep 22, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
42 changes: 26 additions & 16 deletions src/arch/svm/SpokeUtils.ts
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -165,6 +165,27 @@ async function _callGetTimestampForSlotWithRetry(
// @note: getBlockTime receives a slot number, not a block number.
let _timestamp: bigint;

const retryCall = async () => {
const slot = slotNumber.toString();
// Implement exponential backoff with jitter where the # of seconds to wait is = 2^retryAttempt + jitter
// e.g. First two retry delays are ~1.5s and ~2.5s.
const delaySeconds = 2 ** retryAttempt + Math.random();

if (retryAttempt >= maxRetries) {
throw new Error(`Timeout on SVM getBlockTime() for slot ${slot} after ${retryAttempt} retry attempts`);
}
logger?.debug({
at: "getTimestampForSlot",
message: `Retrying getBlockTime() after ${delaySeconds} seconds for retry attempt #${retryAttempt}`,
slot,
retryAttempt,
maxRetries,
delaySeconds,
});
await delay(delaySeconds);
return _callGetTimestampForSlotWithRetry(provider, slotNumber, ++retryAttempt, maxRetries, logger);
};

try {
_timestamp = await provider.getBlockTime(slotNumber).send();
} catch (err) {
Expand All @@ -180,22 +201,7 @@ async function _callGetTimestampForSlotWithRetry(
return undefined;

case SVM_BLOCK_NOT_AVAILABLE: {
// Implement exponential backoff with jitter where the # of seconds to wait is = 2^retryAttempt + jitter
// e.g. First two retry delays are ~1.5s and ~2.5s.
const delaySeconds = 2 ** retryAttempt + Math.random();
if (retryAttempt >= maxRetries) {
throw new Error(`Timeout on SVM getBlockTime() for slot ${slot} after ${retryAttempt} retry attempts`);
}
logger?.debug({
at: "getTimestampForSlot",
message: `Retrying getBlockTime() after ${delaySeconds} seconds for retry attempt #${retryAttempt}`,
slot,
retryAttempt,
maxRetries,
delaySeconds,
});
await delay(delaySeconds);
return _callGetTimestampForSlotWithRetry(provider, slotNumber, ++retryAttempt, maxRetries, logger);
return await retryCall();
}

default:
Expand All @@ -211,6 +217,10 @@ async function _callGetTimestampForSlotWithRetry(
}
}

// If the timestamp is null, then the timestamp is not available yet for the block so retrying might help.
if (_timestamp === null) {
return await retryCall();
}
const timestamp = Number(_timestamp);
assert(BigInt(timestamp) === _timestamp, `Unexpected SVM block timestamp: ${_timestamp}`); // No truncation.

Expand Down