/** Encode raw bytes as a bech32 string under the given human-readable prefix. */
export declare function bech32Encode(hrp: string, bytes: Uint8Array): string;
/**
 * Encode a hex Cardano address (payment or stake/reward) as bech32 (`addr1…` / `stake1…`). The
 * human-readable prefix is derived from the address header byte: the high nibble is the address
 * type (0b1110/0b1111 = reward), the low nibble is the network id (1 = mainnet, else testnet).
 * Returns null for empty/invalid input — callers can fall back to the raw hex.
 */
export declare function addressBech32(hex: string | null | undefined): string | null;
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