/**
 * Rate table primitives for Joule resource-credit metering.
 *
 * A `IRateTable` maps each `ResourceClass` to a `µJ-per-unit` price.
 * All arithmetic is `bigint`; no floating-point is introduced.
 *
 * @see joule-resource-credits spec, Requirement 1.1, 1.6
 */
import { ResourceClass } from './resourceClass';
/**
 * Per-class pricing row inside a rate table.
 */
export interface IRateTableEntry {
    /** Denominator unit string, e.g. `'request'`, `'MB-day'`, `'MB-out'`. */
    unit: string;
    /** Cost per one unit expressed in µJ (bigint). */
    microJoulesPerUnit: bigint;
    /** Human-readable description of what this class covers. */
    description: string;
}
/**
 * Versioned, signed rate table.
 *
 * Once recorded on-ledger, a rate table is immutable.
 * Historical pricing is preserved so that per-request events can
 * reference the version that was active at emit time (Req 1.3).
 */
export interface IRateTable {
    /** Monotonically increasing, starting at 1. */
    version: number;
    /** Unix milliseconds at which this table becomes effective. */
    effectiveAt: number;
    /** One entry per resource class. All four v1 classes must be present. */
    entries: Record<ResourceClass, IRateTableEntry>;
    /** Operator quorum key fingerprints that signed this table. */
    signedBy: ReadonlyArray<string>;
}
/**
 * Compute the µJ cost for `units` of resource class `cls` under `rate`.
 *
 * Formula: `microJoules = units * microJoulesPerUnit` (bigint, exact).
 *
 * @see joule-resource-credits spec, Requirement 1.6
 */
export declare function priceMicroJoules(rate: IRateTable, cls: ResourceClass, units: bigint): bigint;
/**
 * Default bootstrap rate table (version 1).
 *
 * Rates are intentionally conservative placeholders; the operator quorum
 * SHOULD submit a `RateTableUpdateAction` before opening to members.
 *
 * @see joule-resource-credits spec, Requirement 1.1
 */
export declare const BOOTSTRAP_RATE_TABLE: Readonly<IRateTable>;
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