import type { AttributeMap } from './mapping.js';
import type { Logger } from '@cat-factory/kernel';
/** An OTLP `AnyValue` in the JSON encoding (string / bool / int / double / string list). */
export type AnyValue = {
    stringValue: string;
} | {
    boolValue: boolean;
} | {
    intValue: string;
} | {
    doubleValue: number;
} | {
    arrayValue: {
        values: AnyValue[];
    };
};
/** An OTLP `KeyValue` pair (an attribute). */
export interface KeyValue {
    key: string;
    value: AnyValue;
}
/** Encode a neutral attribute map as an OTLP `KeyValue[]`. */
export declare function keyValues(attrs: AttributeMap): KeyValue[];
/**
 * POST an OTLP/JSON payload to `endpoint`, best-effort. Observability must never break the
 * caller, so a non-2xx response or a transport error is only logged (never thrown) and the
 * batch is dropped — the documented worst case. Bounded by {@link SEND_TIMEOUT_MS} so a
 * hung collector can't dangle the caller's budget.
 */
export declare function postOtlp(opts: {
    fetchImpl: typeof fetch;
    endpoint: string;
    headers: Record<string, string>;
    payload: unknown;
    logger?: Logger;
    timeoutMs?: number;
}): Promise<void>;
//# sourceMappingURL=otlp.d.ts.map