/**
 * Returns the JS bigint value represented by the byte array of a BIGNUM in DuckDB's internal format.
 *
 * DuckDB stores BIGNUMs as an array of bytes consisting of a three-byte header followed by a variable number of bytes
 * (at least one). The header specifies the number of bytes after the header, and whether the number is positive or
 * negative. The bytes after the header specify the absolute value of the number, in big endian format.
 *
 * The sign of the number is determined by the MSB of the header, which is 1 for positive and 0 for negative. Negative
 * numbers also have all bytes of both the header and value inverted. (For negative numbers, the MSB is 0 after this
 * inversion. Put another way: the MSB of the header is always 1, but it's inverted for negative numbers.)
 */
export declare function getBigNumFromBytes(bytes: Uint8Array): bigint;