import { type TEnv, type TEnvData, type TEnvSpec, type TEnvSpecs, type TEnvValidator } from './types';
/** Validates environment variables and throws one error containing every failed variable. */
export declare function validateEnv<GSpecs extends Record<string, unknown>>(env: TEnv, specs: TEnvSpecs<GSpecs>): TEnvData<GSpecs>;
/** Validates one environment variable and throws when validation fails. */
export declare function validateEnvVar<GInput, GOutput>(env: TEnv, envKey: string, spec: TEnvValidator<GInput, GOutput> | Omit<TEnvSpec<GInput, GOutput>, 'envKey'>): GOutput;
export declare function validateEnvVar<GInput, GOutput>(env: TEnv, spec: TEnvSpecWithEnvKey<GInput, GOutput>): GOutput;
type TEnvSpecWithEnvKey<GInput, GOutput> = TEnvSpec<GInput, GOutput> & {
    envKey: string;
};
export {};
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