如何将ed25519字节转换为Tezos公钥

我试图通过base58编码ed255191公钥字节来做到这一点.考虑以下代码示例:

 const seed = crypto.randomBytes(32);
const keyPair = ed25519.MakeKeypair(seed);
const base58encoded = base58.encode(keyPair.publicKey);

console.log('ed25519 pub key bytes len: ' + keyPair.publicKey.length);
console.log('base58 pub key: ' + base58encoded);
console.log('base58 pub key len: ' + base58encoded.length);
console.log('actual key: edpktx799pgw7M4z8551URER52VcENNCSZwE9f9cst4v6h5vCrQmJE');
console.log('actual key len: ' + 'edpktx799pgw7M4z8551URER52VcENNCSZwE9f9cst4v6h5vCrQmJE'.length);
 

它打印:

 ed25519 pub key bytes len: 32
base58 pub key: 6jRoreKb7RXAQZBuKZs7WDzsFHHrg62GkMmkXuiWqtKm
base58 pub key len: 44
actual key: edpktx799pgw7M4z8551URER52VcENNCSZwE9f9cst4v6h5vCrQmJE
actual key len: 54
 

我得到的base58字符串比实际的Tezos公钥短10个字符.这以及该主题建议我在使用base58对其进行编码之前,需要给我的base58数据加上一些神奇的字节作为前缀.那些神奇的字节是什么?是否有关于此的文档?

谢谢.

在亚瑟·B回答后编辑:

我尝试在base58对其进行编码之前,将前缀前缀ed25519附加到base58字节.但是,当真正的Tezos公钥包含54个字符时,我还是得到了49个字符.附加了4个随机字节后,我需要54个字符和一个以edpk开头的值.显然,这意味着前缀是正确的-但是我从哪里得到剩余的4个字节?

在评论中进行讨论后编辑:

4个字节.使用base58check后,我得到了以1edpk开头的55个字节-这样看起来像是一个有效的公共Tezos地址,前缀为1.

当前问题是:当使用键(特别是-计算其哈希)时,我删除了前导1并获得了54个字符.结果,我正在使用的用于散列密钥的库引发了Invalid checksum错误.显然,1是base58check校验和的一部分.不过,如果未删除,则密钥将具有无效的前缀.更新的代码示例如下所示:

 const realKey = 'edpktx799pgw7M4z8551URER52VcENNCSZwE9f9cst4v6h5vCrQmJE';
const seed = crypto.randomBytes(32);
const keyPair = ed25519.MakeKeypair(seed);
const directPubKeyBytes = keyPair.publicKey;

const tezosPublicKeyPrefix = Buffer.from([13, 15, 37, 217]);
const prefixedPublicKey = Buffer.concat([tezosPublicKeyPrefix, directPubKeyBytes]);
const base58checkEncoded = base58check.encode(prefixedPublicKey).substr(1);

console.log('ed25519 pub key bytes len: ' + prefixedPublicKey.length);
console.log('base58 pub key: ' + base58checkEncoded);
console.log('base58 pub key len: ' + base58checkEncoded.length);
console.log('actual key len: ' + realKey.length);

const publicKey = new Key({ key: base58checkEncoded });
await publicKey.ready;
return publicKey.publicKeyHash();
 

它打印:

 ed25519 pub key bytes len: 36
base58 pub key: edpkvCRxvpVG6FYAevL5Kqf4cQhaVAdyovGqrSCezHhNnav5BwjhuZ
base58 pub key len: 54
actual key len: 54
(node:12395) UnhandledPromiseRejectionWarning: Error: Invalid checksum
    at Object.decode (/home/kspisacki/coding/wallets/node_modules/bs58check/base.js:41:25)
    at Object.b58cdecode (/home/kspisacki/coding/wallets/node_modules/sotez/dist/node/index.js:1:12743)
    at z.<anonymous> (/home/kspisacki/coding/wallets/node_modules/sotez/dist/node/index.js:1:15122)
    at Generator.next (<anonymous>)
    at o (/home/kspisacki/coding/wallets/node_modules/sotez/dist/node/index.js:1:13324)

 

对此的任何进一步帮助将不胜感激,因为尽管阅读了很多有关该主题的知识,但我不知道如何使它起作用；)

I tried to do that by base58 encoding ed255191 public key bytes. Consider a following code sample:

const seed = crypto.randomBytes(32);
const keyPair = ed25519.MakeKeypair(seed);
const base58encoded = base58.encode(keyPair.publicKey);

console.log('ed25519 pub key bytes len: ' + keyPair.publicKey.length);
console.log('base58 pub key: ' + base58encoded);
console.log('base58 pub key len: ' + base58encoded.length);
console.log('actual key: edpktx799pgw7M4z8551URER52VcENNCSZwE9f9cst4v6h5vCrQmJE');
console.log('actual key len: ' + 'edpktx799pgw7M4z8551URER52VcENNCSZwE9f9cst4v6h5vCrQmJE'.length);

It prints:

ed25519 pub key bytes len: 32
base58 pub key: 6jRoreKb7RXAQZBuKZs7WDzsFHHrg62GkMmkXuiWqtKm
base58 pub key len: 44
actual key: edpktx799pgw7M4z8551URER52VcENNCSZwE9f9cst4v6h5vCrQmJE
actual key len: 54

A base58 string that I got is 10 characters shorter than an actual Tezos public key. This, and also that topic suggests I need to prefix my ed25519 data with some magical bytes before encoding it with base58. What are those magical bytes? Is there a documentation about that?

Thanks.

EDIT after Arthur B's answer:

I tried appending prefix bytes: \013\015\037\217 to ed25519 bytes before base58 encoding them. Still, I got 49 characters when a real Tezos public key has 54 characters. After appending additional 4 random bytes, I got desired 54 chars and a value that starts with edpk. Clearly this means that prefix is correct - but where do I get remaining 4 bytes from?

EDIT after discussion in comments:

4 bytes were missing due to me using base58 instead of base58check that has additional 4 bytes as a checksum. After using base58check I got 55 bytes starting with 1edpk - so something looking like a valid public Tezos address prepended with a 1 .

Current problem is: when working with the key (specifically - computing its hash) I removed a leading 1 and got 54 characters. As a result, a library I'm using to hash a key threw an Invalid checksum error. Clearly, 1 is a part of base58check checksum. Still, if not removed the key is going to have an invalid prefix. An updated code sample looks like this:

const realKey = 'edpktx799pgw7M4z8551URER52VcENNCSZwE9f9cst4v6h5vCrQmJE';
const seed = crypto.randomBytes(32);
const keyPair = ed25519.MakeKeypair(seed);
const directPubKeyBytes = keyPair.publicKey;

const tezosPublicKeyPrefix = Buffer.from([13, 15, 37, 217]);
const prefixedPublicKey = Buffer.concat([tezosPublicKeyPrefix, directPubKeyBytes]);
const base58checkEncoded = base58check.encode(prefixedPublicKey).substr(1);

console.log('ed25519 pub key bytes len: ' + prefixedPublicKey.length);
console.log('base58 pub key: ' + base58checkEncoded);
console.log('base58 pub key len: ' + base58checkEncoded.length);
console.log('actual key len: ' + realKey.length);

const publicKey = new Key({ key: base58checkEncoded });
await publicKey.ready;
return publicKey.publicKeyHash();

It prints:

ed25519 pub key bytes len: 36
base58 pub key: edpkvCRxvpVG6FYAevL5Kqf4cQhaVAdyovGqrSCezHhNnav5BwjhuZ
base58 pub key len: 54
actual key len: 54
(node:12395) UnhandledPromiseRejectionWarning: Error: Invalid checksum
    at Object.decode (/home/kspisacki/coding/wallets/node_modules/bs58check/base.js:41:25)
    at Object.b58cdecode (/home/kspisacki/coding/wallets/node_modules/sotez/dist/node/index.js:1:12743)
    at z.<anonymous> (/home/kspisacki/coding/wallets/node_modules/sotez/dist/node/index.js:1:15122)
    at Generator.next (<anonymous>)
    at o (/home/kspisacki/coding/wallets/node_modules/sotez/dist/node/index.js:1:13324)

Any further help with that would be greatly appreciated as I don't understand how to get this to work despite reading up A LOT on the topic ;)