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Java sdk for Dapps interact with cwv blockchain node

There is a newer version: 2.2.1

package org.brewchain.sdk.model;

public interface ICrypto {

    /**
     * 生成交易签名
     * @param privateKey  私钥
     * @param body 待签名body
     * @return
     */
    byte[] sign(String privateKey,byte[] body);
}