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import { hasBigInt } from 'https://deno.land/x/polkadot@0.2.40/util/mod.ts';import { bip39ToSeed, isReady } from 'https://deno.land/x/polkadot@0.2.40/wasm-crypto/mod.ts';
import { mnemonicToSeedSync } from './bip39.ts';import { mnemonicValidate } from './validate.ts';
/** * @name mnemonicToLegacySeed * @summary Creates a valid Ethereum/Bitcoin-compatible seed from a mnemonic input * @example * <BR> * * ```javascript * import { mnemonicGenerate, mnemonicToLegacySeed, mnemonicValidate } from 'https://deno.land/x/polkadot@0.2.40/util-crypto/mod.ts'; * * const mnemonic = mnemonicGenerate(); // => string * const isValidMnemonic = mnemonicValidate(mnemonic); // => boolean * * if (isValidMnemonic) { *   console.log(`Seed generated from mnemonic: ${mnemonicToLegacySeed(mnemonic)}`); => u8a * } * ``` */export function mnemonicToLegacySeed (mnemonic: string, password = '', onlyJs?: boolean, byteLength: 32 | 64 = 32): Uint8Array {  if (!mnemonicValidate(mnemonic)) {    throw new Error('Invalid bip39 mnemonic specified');  } else if (![32, 64].includes(byteLength)) {    throw new Error(`Invalid seed length ${byteLength}, expected 32 or 64`);  }
  return byteLength === 32    ? !hasBigInt || (!onlyJs && isReady())      ? bip39ToSeed(mnemonic, password)      : mnemonicToSeedSync(mnemonic, password).subarray(0, 32)    : mnemonicToSeedSync(mnemonic, password);}