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/**
 * Generate x random words. Uses Cryptographically-Secure Random Number Generator.
 * @param wordlist imported wordlist for specific language
 * @param strength mnemonic strength 128-256 bits
 * @example
 * generateMnemonic(wordlist, 128)
 * // 'legal winner thank year wave sausage worth useful legal winner thank yellow'
 */
export declare function generateMnemonic(wordlist: string[], strength?: number): string;
/**
 * Reversible: Converts mnemonic string to raw entropy in form of byte array.
 * @param mnemonic 12-24 words
 * @param wordlist imported wordlist for specific language
 * @example
 * const mnem = 'legal winner thank year wave sausage worth useful legal winner thank yellow';
 * mnemonicToEntropy(mnem, wordlist)
 * // Produces
 * new Uint8Array([
 *   0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f,
 *   0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f
 * ])
 */
export declare function mnemonicToEntropy(mnemonic: string, wordlist: string[]): Uint8Array;
/**
 * Reversible: Converts raw entropy in form of byte array to mnemonic string.
 * @param entropy byte array
 * @param wordlist imported wordlist for specific language
 * @returns 12-24 words
 * @example
 * const ent = new Uint8Array([
 *   0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f,
 *   0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f, 0x7f
 * ]);
 * entropyToMnemonic(ent, wordlist);
 * // 'legal winner thank year wave sausage worth useful legal winner thank yellow'
 */
export declare function entropyToMnemonic(entropy: Uint8Array, wordlist: string[]): string;
/**
 * Validates mnemonic for being 12-24 words contained in `wordlist`.
 */
export declare function validateMnemonic(mnemonic: string, wordlist: string[]): boolean;
/**
 * Irreversible: Uses KDF to derive 64 bytes of key data from mnemonic + optional password.
 * @param mnemonic 12-24 words
 * @param passphrase string that will additionally protect the key
 * @returns 64 bytes of key data
 * @example
 * const mnem = 'legal winner thank year wave sausage worth useful legal winner thank yellow';
 * await mnemonicToSeed(mnem, 'password');
 * // new Uint8Array([...64 bytes])
 */
export declare function mnemonicToSeed(mnemonic: string, passphrase?: string): Promise<Uint8Array>;
/**
 * Irreversible: Uses KDF to derive 64 bytes of key data from mnemonic + optional password.
 * @param mnemonic 12-24 words
 * @param passphrase string that will additionally protect the key
 * @returns 64 bytes of key data
 * @example
 * const mnem = 'legal winner thank year wave sausage worth useful legal winner thank yellow';
 * mnemonicToSeedSync(mnem, 'password');
 * // new Uint8Array([...64 bytes])
 */
export declare function mnemonicToSeedSync(mnemonic: string, passphrase?: string): Uint8Array;
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