@exromany/lido-csm-sdk/dist/esm/rewards-sdk/get-operator-curve-id.js

[](https://github.com/lidofinance/lido-csm-sdk/blob/main/LICENSE.txt) [](h

/**
 * Gets the operator's curve ID that was active at a specific block number.
 *
 * This function looks through the historical curve ID changes and finds the most recent
 * curve ID change that occurred at or before the specified block number.
 *
 * @param blockNumber - The block number to find the curve ID for
 * @param curveIdChanges - Array of historical curve ID changes, should be sorted by block number
 * @param defaultCurveId - The default curve ID to use if no changes found
 * @returns The curve ID that was active at the specified block
 *
 * @example
 * ```ts
 * const curveIdChanges = [
 *   { curveId: 1n, blockNumber: 100n },
 *   { curveId: 2n, blockNumber: 200n },
 * ];
 *
 * getOperatorCurveIdByBlock(150n, curveIdChanges, 0n); // Returns 1n
 * getOperatorCurveIdByBlock(250n, curveIdChanges, 0n); // Returns 2n
 * getOperatorCurveIdByBlock(50n, curveIdChanges, 0n);  // Returns 0n (default)
 * ```
 */
export const getOperatorCurveIdByBlock = (blockNumber, curveIdChanges, defaultCurveId) => {
    // Find the last curve ID change that occurred at or before the given block
    const curveIdChange = curveIdChanges.findLast((change) => blockNumber >= change.blockNumber);
    // Return the found curve ID, or the provided default if no changes occurred before this block
    return curveIdChange?.curveId ?? defaultCurveId;
};
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