Address

用於壓縮公鑰的工具。

從 Web3j 和 kaia 庫（web3j-ext）導入必要的類

要將 "壓縮公鑰 "轉換為 {x, y}格式的 "AccountPublicKey"，請使用 AccountKeyPublicUtils.decompressKey 。

要將 AccountKeyPublic 壓縮為 Compressed Public Key 字符串，請使用 AccountKeyPublicUtils.toCompressedPublicKey 。

PublicKeyUtilsExample.java

package org.web3j.example.utils;

import org.web3j.crypto.transaction.account.AccountKeyPublic;

import org.web3j.utils.AccountKeyPublicUtils;

public class PublicKeyUtilsExample {

public static void main(String[] args) {

System.out.println("From compressed public key to AccountKeyPublic");

System.out.println(AccountKeyPublicUtils.decompressKey("03dc9dccbd788c00fa98f7f4082f2f714e799bc0c29d63f04d48b54fe6250453cd"));

System.out.println("From x,y to compressed public key");

AccountKeyPublic publicKey= AccountKeyPublic.create("0xdc9dccbd788c00fa98f7f4082f2f714e799bc0c29d63f04d48b54fe6250453cd","0xaf06ca34ae8714cf3dae06bacdb78c7c2d4054bd38961d40853cd5f15955da79");

System.out.println(AccountKeyPublicUtils.toCompressedPublicKey(publicKey.getPublicKey()));

}

}

output

❯ java PublicKeyUtilsExample.java

From compressed public key to AccountKeyPublic

AccountKeyPublic x : 0xdc9dccbd788c00fa98f7f4082f2f714e799bc0c29d63f04d48b54fe6250453cd / y : 0xaf06ca34ae8714cf3dae06bacdb78c7c2d4054bd38961d40853cd5f15955da79

From x,y to compressed public key

03dc9dccbd788c00fa98f7f4082f2f714e799bc0c29d63f04d48b54fe6250453cd