import { ValueTransformer } from 'typeorm';
/**
 * TypeORM transformers used to marshal properties of an arbitrary type
 * into the type supported by the database.
 */
export declare class DatabaseTransformer {
    /**
     * A transformer that converts array of strings to pg array
     */
    static get array(): ValueTransformer;
    /**
     * A transformer that converts a Date to pg timestamp and vice versa
     */
    static get timestamp(): ValueTransformer;
    /**
     * A transformer that converts a string to a BigNumber and vice versa
     */
    static get bignumber(): ValueTransformer;
    /**
     * A transformer that converts a string[] to a BigNumber[] and vice versa
     */
    static get bignumberArray(): ValueTransformer;
    /**
     * A transformer that converts a bignumber-like object to a string and
     * removes insignificant trailing zeros
     */
    static get bignumberString(): ValueTransformer;
    /**
     * A transformer that converts a string to a number and vice versa
     */
    static get number(): ValueTransformer;
    /**
     * A transformer that converts a string to lowercase
     */
    static get lowercase(): ValueTransformer;
    /**
     * A transformer that converts a string to uppercase
     */
    static get uppercase(): ValueTransformer;
    /**
     * Convert a hex string to bytea and vice versa
     */
    static get bytea(): ValueTransformer;
    /**
     * Convert a hex string array to bytea array and vice versa
     */
    static get byteaArray(): ValueTransformer;
    /**
     * Convert a representation of a number to a bignumber if defined
     * @param value The value to convert
     */
    private static toSafeBigNumber;
    /**
     * Convert a representation of hex string to pg compatible bytea
     * @param value The hex string to convert
     */
    private static toBytea;
    /**
     * Convert a pg bytea to hex string
     * @param value The bytea
     */
    private static fromBytea;
}
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