import type { TokenApproval, TraceFrame } from "../types.js";
/**
 * Extract ERC-20 Approval events from a call trace. Pre-order walk, skipping
 * reverted subtrees (their logs are rolled back on-chain and don't appear in
 * receipts).
 *
 * ERC-721 Approval shares the topic hash but indexes tokenId so its log has
 * 4 topics — filtered out here. Use `parseEvents` (forthcoming) for the
 * generic by-signature decoder.
 *
 * `logIndex` reflects position in the successful log stream and increments
 * for every log seen (including non-Approval ones we skip), matching the
 * `parseTokenDeltas` convention so the two parsers' indices are comparable.
 */
export declare function parseApprovals(root: TraceFrame): TokenApproval[];
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