/**
 * Normalizes a signature's `v` value (as an already-parsed number) to a
 * 4-number range starting at `rangeMin`, optionally also setting the high bit
 * of the value.
 *
 * `v` values are single bytes, so they have a max value of 254. The real value
 * produced for this byte by ECDSA signatures is typically 0, 1, 2, or 3.
 * Bitcoin encodes certain address information in signatures by offsetting the
 * byte. In particular, BIP137 specifies that `v` bytes represent:
 *  - p2pkh with an uncompressed public key in the range [27,30]
 *  - p2pkh with a compressed public key in the range [31,34]
 *  - p2sh-p2wpkh (nested segwit) in the range [35,38]
 *  - p2wpkh (native segwit) in the range [39,43]
 *
 * Additionally, OrangeKit sets the high bit of the `v` value to indicate that a
 * signature represents a signature of a string representation of a hex value,
 * rather than the bytes the hex value encodes. For example, if a signature is
 * requested over `0x1234`, the high `v` bit indicates whether the signature was
 * performed over the 2 bytes `0x12` and `0x34`, or the 6 bytes representing the
 * characters `0`, `x`, `1`, `2`, `3`, and `4`. Whether this is necessary will
 * depend on the signing wallet.
 *
 * This function takes any `v` value in any of those ranges and normalizes it to
 * the requested range (indicated by its minimum value), setting its high bit if
 * `setHighBit` is set to `true`.
 *
 * @return The updated `v` value as a `number`.
 */
declare function normalizeV(v: number, rangeMin: number, setHighBit?: boolean): number;
/**
 * Normalizes a signature by updating the `v` value for a given bitcoin address.
 * @see {normalizeV} for more details.
 *
 * @param signature Message signature.
 * @param bitcoinAddress The bitcoin address that signed the message.
 * @param publicKey The public key of the bitcoin address used to sign the
 *        message.
 *
 * @throws An error when the address is not supported.
 * @returns The normalized signature as hex string with the updated `v` value.
 */
declare function normalizeSignature(signature: Buffer, bitcoinAddress: string, publicKey: string): `0x${string}`;
declare const _default: {
    normalizeV: typeof normalizeV;
    normalizeSignature: typeof normalizeSignature;
};
export default _default;
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