import { ConnectionNames, PosgresProgramOptions } from '../options/postgres';
import { DnsResolver } from '../utils';
import { Logger } from 'ts-log';
import { Observable } from 'rxjs';
import { PgConnectionConfig } from '@cardano-sdk/projection-typeorm';
import { Pool, PoolConfig } from 'pg';
export declare const getPoolWithServiceDiscovery: (dnsResolver: DnsResolver, logger: Logger, { host, database, max, password, ssl, user }: PoolConfig) => Promise<Pool>;
export declare const loadSecret: (path: string) => string;
export declare const connStringToPgConnectionConfig: (postgresConnectionString: string, { poolSize, ssl }?: {
    poolSize?: number | undefined;
    ssl?: {
        ca: string;
    } | undefined;
}) => PgConnectionConfig;
export declare const getConnectionConfig: <Suffix extends ConnectionNames>(dnsResolver: DnsResolver, program: string, suffix: Suffix, options?: PosgresProgramOptions<Suffix, keyof import("../options/postgres").BasePosgresProgramOptions> | undefined) => Observable<PgConnectionConfig>;
export declare const getPool: (dnsResolver: DnsResolver, logger: Logger, options?: PosgresProgramOptions<'DbSync'>) => Promise<Pool | undefined>;
export declare const connectionStringFromArgs: <Suffix extends ConnectionNames>(args: PosgresProgramOptions<Suffix, keyof import("../options/postgres").BasePosgresProgramOptions>, suffix: Suffix) => string | undefined;
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