fabric 存储 Enrollment信息

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本文介绍了一个基于Hyperledger Fabric的Java服务类，用于管理用户的身份信息，包括初始化钱包、存储及检索身份凭证等功能。

package com.yl.service.fabricca;

import cn.hutool.core.util.URLUtil;
import com.yl.exceptions.RRException;
import lombok.extern.slf4j.Slf4j;
import org.hyperledger.fabric.gateway.*;
import org.hyperledger.fabric.sdk.identity.X509Enrollment;
import org.springframework.stereotype.Service;
import org.springframework.util.ObjectUtils;

import javax.annotation.PostConstruct;
import java.io.IOException;
import java.security.cert.CertificateException;

/**
 * FabricStore
 *
 * @author 王小虎
 * @date 2022-03-11 10:29
 */
@Slf4j
@Service
public class WalletStore {
    private Wallet wallet;
    private static final String COUCHDB_HOST = "http://admin:adminpw@192.168.2.55:5984";
    private static final String WALLET_DB = "crm-wallet";

    @PostConstruct
    public void init() {
        try {
            wallet = Wallets.newCouchDBWallet(URLUtil.url(COUCHDB_HOST), WALLET_DB);
            log.info("已存在钱包列表--->{}", wallet.list().toString());
        } catch (IOException e) {
            log.error("初始化钱包失败");
            throw new RRException(e);
        }
    }

    /**
     * 存储身份信息到钱包缓存
     *
     * @param tmpUser tmpUser
     */
    public void saveIdentity(IntermediateUser tmpUser) {
        if (ObjectUtils.isEmpty(tmpUser)) {
            return;
        }
        try {
            wallet.put(tmpUser.getAccount() + ":" + tmpUser.getAffiliation(), Identities.newX509Identity(tmpUser.getMspId(), tmpUser.getEnrollment()));
        } catch (IOException | CertificateException e) {
            log.error("存储本地证书失败-->" + tmpUser.getAccount() + ":" + tmpUser.getAffiliation());
        }
    }

    /**
     * 从本地钱包中获取identity
     *
     * @param account     account
     * @param affiliation affiliation
     * @return Identity
     */
    public Identity getIdentity(String account, String affiliation) {
        log.info("缓存中获取User:{},{}", account, affiliation);
        Identity identity = null;
        try {
            identity = wallet.get(account + ":" + affiliation);
        } catch (IOException e) {
            log.error("查询本地证书失败-->" + account + ":" + affiliation);
        }

        return identity;
    }

    /**
     * 从本地钱包中的证件信息中获取Enrollment
     *
     * @param account     account
     * @param affiliation affiliation
     * @return X509Enrollment
     */
    public X509Enrollment getEnrollment(String account, String affiliation) {
        X509Identity identity = (X509Identity) getIdentity(account, affiliation);
        if (ObjectUtils.isEmpty(identity)) {
            return null;
        }
        return new X509Enrollment(identity.getPrivateKey(), Identities.toPemString(identity.getCertificate()));
    }
}