/**
 * Shared resource-level helpers.
 *
 * One implementation of the small utilities every hand-written resource
 * needs: resolving the acting user, building wallet-scoped header bags,
 * merging abort signals, and emitting receipt/budget headers on the SDK
 * event bus. Resources used to carry private copies of each; they now
 * import them from here.
 */
import type { EventBus } from "../events.js";
import type { NetworkId } from "../chains/index.js";
import type { Receipt } from "../types/index.js";
export interface WalletContext {
    getWalletMaybe(): {
        address: string | null;
        network: NetworkId | null;
    };
    getTokenMaybe(): string | null;
}
export interface EventedContext extends WalletContext {
    events: EventBus;
}
export declare function resolveUserAddress(input: {
    userAddress?: string;
}, fallback: string | null): string;
export declare function walletHeaders(ctx: WalletContext, userAddress?: string, network?: NetworkId): {
    key?: string;
    userAddress?: string;
    network?: NetworkId;
};
export declare function mergeSignals(a: AbortSignal | undefined, b: AbortSignal): {
    signal: AbortSignal;
    cleanup: () => void;
};
export declare function emitHeaders(ctx: EventedContext, response: Response, requestId: string | null, wallet: {
    address: string | null;
    network: NetworkId | null;
}): Receipt | null;
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