~/Crypt$ openssl ec -in ec-privatekey.pem -text -noout
read EC key
Private-Key: (256 bit)
priv:
 00:91:d4:22:6f:4d:64:08:1f:a5:4a:d2:c5:49:3f:
 88:83:6a:d6:08:4c:fd:ec:27:fd:12:cd:ad:eb:91:
 e7:68:7f
pub:
 04:d0:6d:f7:98:26:78:3c:a6:e0:e4:4b:70:42:39:
 3a:b9:cb:fd:41:cf:43:4e:bf:09:75:c1:97:60:6c:
 47:77:3a:f4:26:dd:4d:22:76:98:13:41:86:0a:11:
 4c:4f:9a:4a:fb:07:ef:48:b9:18:97:9b:a5:d2:87:
 33:c1:62:a3:9e
ASN1 OID: secp256k1

drequinox@drequinox-OP7010:~/Crypt$ openssl ec -in ec-pubkey.pem -pubin -text -noout
read EC key
Private-Key: (256 bit)
pub:
 04:d0:6d:f7:98:26:78:3c:a6:e0:e4:4b:70:42:39:
 3a:b9:cb:fd:41:cf:43:4e:bf:09:75:c1:97:60:6c:
 47:77:3a:f4:26:dd:4d:22:76:98:13:41:86:0a:11:
 4c:4f:9a:4a:fb:07:ef:48:b9:18:97:9b:a5:d2:87:
 33:c1:62:a3:9e
ASN1 OID: secp256k1
drequinox@drequinox-OP7010:~/Crypt$

~/Crypt$ openssl ecparam -name secp256k1 -out secp256k1.pem
drequinox@drequinox-OP7010:~/Crypt$ cat secp256k1.pem
-----BEGIN EC PARAMETERS-----
BgUrgQQACg==
-----END EC PARAMETERS-----

drequinox@drequinox-OP7010:~/Crypt$ openssl ecparam -in secp256k1.pem -text -param_enc explicit -noout
Field Type: prime-field
Prime:
 00:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:
 ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:fe:ff:
 ff:fc:2f
A:    0
B:    7 (0x7)
Generator (uncompressed):
 04:79:be:66:7e:f9:dc:bb:ac:55:a0:62:95:ce:87:
 0b:07:02:9b:fc:db:2d:ce:28:d9:59:f2:81:5b:16:
 f8:17:98:48:3a:da:77:26:a3:c4:65:5d:a4:fb:fc:
 0e:11:08:a8:fd:17:b4:48:a6:85:54:19:9c:47:d0:
 8f:fb:10:d4:b8
Order:
 00:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:ff:
 ff:fe:ba:ae:dc:e6:af:48:a0:3b:bf:d2:5e:8c:d0:
 36:41:41
Cofactor:  1 (0x1)

哈希函数用于将任意长的输入字符串创建为固定长度的摘要。哈希函数是无密钥的，提供数据完整性服务。它们通常使用迭代和专用哈希函数构建技术构建。各种哈希函数族可用，如 MD、SHA1、SHA-2、SHA-3、RIPEMD 和 Whirlpool。哈希函数通常用于数字签名和消息认证码，如 HMACs。它们有三个安全性质，即原像抗性、第二原像抗性和碰撞抗性。这些性质稍后在本节中解释。
哈希函数通常用于提供数据完整性服务。这些可以用作单向函数，并构造其他加密原语，如 MAC 和数字签名。一些应用程序使用哈希函数来生成伪随机数（PRNGs）。哈希函数不需要密钥。哈希函数必须满足两个实用和三个安全性质，具体取决于完整性的要求级别。

./bin/xchain-cli consensus invoke --type tdpos --method revokeNominate --account ${ACCOUNT_IF_NEED} --isMulti --fee ${1000_IF_NEED} --desc ${REVOKE_NOMINATE_FILE} -H:${PORT}

// default: 会生成一个tx.out在当前目录下，操作内容和nominate一样
// default: 注意需要在建立/data/acl/addrs，标明提名人和被提名人信息
// default: 上述走多签流程
./bin/xchain-cli multisig sign --tx=./tx.out --output=./key1.sign
./bin/xchain-cli multisig sign --tx=./tx.out  --keys ${acl keys地址}  --output=./key2.sign
./bin/xchain-cli multisig send --tx ./tx.out ./key1.sign,./key2.sign ./key1.sign,./key2.sign -H:${PORT}
// 成功后会生成txid

// revoke_nominate_file
{
        "candidate": "iYjtLcW6SVCiousAb5DFKWtWroahhEj4u"
}

./bin/xchain-cli consensus invoke --type tdpos --method voteCandidate --isMulti --account ${ACL_ACCOUNT} --fee ${1000_IF_NEED} --desc ${VOTE_FILE} -H:${PORT}
// default: 后续会生成一个tx.out在当前目录下
// default: 注意需要在建立/data/acl/addrs，标明提名人和被提名人信息
// default: 上述走多签流程


./bin/xchain-cli multisig sign --tx=./tx.out --output=./key1.sign
./bin/xchain-cli multisig sign --tx=./tx.out  --keys ${被提名人keys地址}  --output=./key2.sign
./bin/xchain-cli multisig send --tx ./tx.out ./key1.sign,./key2.sign ./key1.sign,./key2.sign -H:${PORT}
// 成功后会生成txid

// vote_file
{
        "candidate": "iYjtLcW6SVCiousAb5DFKWtWroahhEj4u",
        "amount": "10"
}