/**
 * Bitcoin address encoding utilities.
 *
 * Bitcoin has three address formats relevant for interop:
 *
 * 1. P2SH (Pay-to-Script-Hash): starts with "3" on mainnet, "2" on testnet.
 *    Encoded with Base58Check (base58 + double-SHA256 checksum).
 *    Payload: 1 version byte + 20-byte script hash.
 *    @see https://en.bitcoin.it/wiki/Pay_to_script_hash
 *
 * 2. SegWit v0 (P2WPKH/P2WSH): starts with "bc1q" on mainnet, "tb1q" on testnet.
 *    Encoded with bech32 (BIP-173). Witness version 0 + 20-byte or 32-byte program.
 *    @see https://github.com/bitcoin/bips/blob/master/bip-0173.mediawiki
 *
 * 3. Taproot (SegWit v1): starts with "bc1p" on mainnet, "tb1p" on testnet.
 *    Encoded with bech32m (BIP-350). Witness version 1 + 32-byte program.
 *    @see https://github.com/bitcoin/bips/blob/master/bip-0350.mediawiki
 */
export declare const BIP122_ADDRESS_TYPE: {
    readonly BASE58CHECK: 1;
    readonly WITNESS: 2;
};
/**
 * Encode a payload using Base58Check encoding.
 * The payload is typically a version byte followed by the hash (e.g. 0x05 + 20-byte script hash for P2SH).
 *
 * Encoding: base58(payload + sha256(sha256(payload))[0..4])
 *
 * @see https://en.bitcoin.it/wiki/Base58Check_encoding
 */
export declare function base58checkEncode(payload: Uint8Array): string;
/**
 * Decode a Base58Check-encoded string and verify its checksum.
 * Returns the payload (version byte + hash) without the 4-byte checksum suffix.
 *
 * @see https://en.bitcoin.it/wiki/Base58Check_encoding#Encoding_a_Bitcoin_address
 */
export declare function base58checkDecode(address: string): Uint8Array;
export type BechEncoding = "bech32" | "bech32m";
/**
 * Decoded witness address components.
 * @see https://github.com/bitcoin/bips/blob/master/bip-0173.mediawiki#segwit-address-format
 */
export interface WitnessAddress {
    /** Human-readable part: "bc" for mainnet, "tb" for testnet */
    hrp: string;
    /** Witness version: 0 for SegWit (P2WPKH/P2WSH), 1 for Taproot */
    version: number;
    /** Witness program: 20 bytes for P2WPKH, 32 bytes for P2WSH/Taproot */
    program: Uint8Array;
}
/**
 * Decode a bech32/bech32m address into its witness version and program.
 * The caller specifies the encoding based on the known address type.
 *
 * @see https://github.com/bitcoin/bips/blob/master/bip-0350.mediawiki#decoding
 */
export declare function bech32Decode(address: string, encoding: BechEncoding): WitnessAddress;
/**
 * Encode a witness program into a bech32/bech32m address.
 * Uses bech32 for version 0, bech32m for version 1+ per BIP-350.
 *
 * @param hrp - Human-readable part: "bc" for mainnet, "tb" for testnet
 * @see https://github.com/bitcoin/bips/blob/master/bip-0350.mediawiki#encoding
 */
export declare function bech32Encode(hrp: string, version: number, program: Uint8Array): string;
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