單鏈錢包通常被稱為主鏈錢包。這種錢包一般是針對(duì)渠道型公鏈開發(fā)的。比方IM Token版和MetaMask(許多朋友叫它小狐貍錢包)都是以太坊單鏈錢包，所以只支撐使用相同規(guī)范的ETH和ERC-20令牌。 多鏈錢包 多鏈錢包簡(jiǎn)單來(lái)說(shuō)便是能夠支撐多個(gè)主鏈渠道令牌的錢包。常見的多鏈錢包有Bitter、imToken2.0、Cobo錢包等。 ?/** ?* entropy為上面通過(guò)SecureRandom生成的隨機(jī)數(shù)組 ?**/ ?public List toMnemonic(byte[] entropy) throws MnemonicException.MnemonicLengthException { ????//為了減少字?jǐn)?shù)刪來(lái)檢查參數(shù)的代碼 ????? ????//計(jì)算entropyhash作為后面的checksum ????byte[] hash = Sha256Hash.hash(entropy);詳情開發(fā)I59案例2OO7需求3O69 ????//將hash轉(zhuǎn)換成二進(jìn)制，true為1，false為0。詳情請(qǐng)看bytesToBits函數(shù)的解析 ????boolean[] hashBits = bytesToBits(hash); ????? ????//將隨機(jī)數(shù)組轉(zhuǎn)換成二進(jìn)制 ????boolean[] entropyBits = bytesToBits(entropy); ????? ????//checksum長(zhǎng)度 ????int checksumLengthBits = entropyBits.length / 32; ? ????// 將entropyBits和checksum加起來(lái)，相當(dāng)于BIP39中的ENT+CS ????boolean[] concatBits = new boolean[entropyBits.length + checksumLengthBits]; ????System.arraycopy(entropyBits, 0, concatBits, 0, entropyBits.length); ????System.arraycopy(hashBits, 0, concatBits, entropyBits.length, checksumLengthBits); ? ????/** ????*this.wordList是助記詞列表。開發(fā)源碼版：yy625019 ?????*? ????**/ ????ArrayList words = new ArrayList<>(); ????? ????//助記詞個(gè)數(shù) ????int nwords = concatBits.length / 11; ????for (int i = 0; i < nwords; ++i) { ??????int index = 0; ??????for (int j = 0; j < 11; ++j) { ????????//java中int是由32位二進(jìn)制組成，index左移1位，如果concatBits對(duì)應(yīng)的位為true則將index對(duì)應(yīng)的位設(shè)置位1 ????????index <<= 1; ????????if (concatBits[(i * 11) + j]) ??????????index |= 0x1; ??????}開發(fā)邏輯：mrsfu123 ??????//根據(jù)索引從助記詞列表中獲取單詞并添加到words ??????words.add(this.wordList.get(index)); ????} ????//得到的助記詞?? ????return words;???? ??}