ideas4u/dewApiTrading

dew api trading use python.

dewApiTrading

dew api trading using python.
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API请求流程示例

1.MD5 单重签名请求流程示例

#以下为java
Long current = System.currentTimeMillis();
Map<String,String> params =  new HashMap<String, String>() ;
params.put("apiKey", apiKey) ;    // API_KEY
params.put("a", a);               //业务参数。。。
params.put("b", b);
......
params.put("tonce", current.toString());
#以下为python
import time
current_milli_time = lambda: int(round(time.time() * 1000))
params = {"apiKey":apiKey,
    "a",a,
    "b":b,
    "tonce":str(current_milli_time())
    }
#a,b为业务参数。

a.参数进行字典排序

#为java代码，
Collection<String> keyset= params.keySet();
List<String> list=new ArrayList<String>(keyset);
Collections.sort(list);
#以下为python
keyset = params.keys()
list_keyset = list(keyset)
list_keyset.sort()

b.参数 k-v 字符串生成

#以下为java代码
String signString = "" ;
for( String key : list ){
    String split = "".equals(signString)?"":"&" ;
    signString += split+ key+"="+params.get(key) ;
}
signString = signString+"&secretKey="+apiSecret;    //API_SECRET
# 以下为python代码
signString = ""
for key in list_keyset:
    split = "" if signString == "" else "&"
    signString += split + key + "=" + params.get(key)
signString = signString+"&secretKey="+apiSecret #API_SECRET

c.基于 UTF-8 编码的 MD5 加密，生成校验字符串 sign

#以下为java代码
String sign = "";
try {
    MessageDigest md = MessageDigest.getInstance("MD5");
    byte[] bytes = md.digest(signString.getBytes("utf-8"));
    final char[] HEX_DIGITS = "0123456789abcdef".toCharArray();
        StringBuilder ret = new StringBuilder(bytes.length * 2);
        for (int i=0; i<bytes.length; i++) {
	        ret.append(HEX_DIGITS[(bytes[i] >> 4) & 0x0f]);
	        ret.append(HEX_DIGITS[bytes[i] & 0x0f]);
        }
        sign =  ret.toString();
}
#以下为python代码
from hashlib import md5
sign = ""
try:
    bytes_signString = bytes(signString,'utf-8')
    digest = md5(bytes_signString).digest()
    HEX_DIGITS = "0123456789abcdef"
    ret = ""
    for item in range(len(bytes_signString)):
        ret = ret + HEX_DIGITS[(bytes_signString[item] >> 4 & 0x0f)]
        ret = ret + HEX_DIGITS[bytes_signString[item] & 0x0f]
    sign = ret

d. 封装参数发起 POST 请求

#以下为java代码
Map<String,String> reqParams =  new HashMap<String, String>() ;
reqParams.put("apiKey", apiKey) ;    // API_KEY
reqParams.put("a", a) ;              //业务参数。。。
reqParams.put("b", b) ;
......
reqParams.put("tonce", current.toString());
reqParams.put("sign",sign) ;         //MD5签名
String result = send(url,reqParams, "UTF-8");
#以下为python代码
#import requests 暂时不需要这个库，send是自已写的请求函数。
reqParams = {"apiKey": apiKey,"a":a,"b":b,"tonce":str(current_milli_time()),"sign":sign}
result = send(url,reqParams,"UTF-8")

ETH私钥签名请求流程

a.参数字典排序

#以下为java
Long current = System.currentTimeMillis();
Map<String,String> params =  new HashMap<String, String>() ;
params.put("apiKey", apiKey) ;    // API_KEY
params.put("a", a);               //业务参数。。。
params.put("b", b);
......
params.put("tonce", current.toString());
Collection<String> keyset= params.keySet();  
List<String> list=new ArrayList<String>(keyset); 
Collections.sort(list);
#以下为python
import time
current_milli_time = lambda: int(round(time.time() * 1000))
params = {"apiKey":apiKey,
    "a",a,
    "b":b,
    "tonce":str(current_milli_time())
    }
#a,b为业务参数。
keyset = params.keys()
list_keyset = list(keyset)
list_keyset.sort()

b.参数字符串生成

#以下为java
String signString = "" ;     
for( String key : list ){
    String split = "".equals(signString)?"":"&" ;
    signString += split+ key+"="+params.get(key) ;
}
#以下为python
signString = ""
for key in list_keyset:
    split = "" if signString == "" else "&"
    signString += split + key + "=" + params.get(key)

c.基于eth私钥加密，生成私钥加密串，并设置到参数map中

#以下为java
String presign = ethSign(password, keystore, signString) ;    //具体方法在后面列出
param.put("presign", presign);
#以下为python
presign = ethSign(password,keystore,signString) #具体方法在后面列出
params = {"apiKey":apiKey,
    "a",a,
    "b":b,
    "tonce":str(current_milli_time()),
    "presign":presign}

d.对照步骤a、b，对param再次进行字典排序并生成字符串

#以下为java
Collection<String> keyset1= params.keySet();  
List<String> list1=new ArrayList<String>(keyset1); 
Collections.sort(list1); 
String signString1 = "" ;     
for( String key : list1 ){
    String split = "".equals(signString1)?"":"&" ;
    signString1 += split+ key+"="+params.get(key) ;
}
signString1 = signString1+"&secretKey="+apiSecret;   //API_SECRET
#以下为python
keyset1 = params.keys()
list1_keyset = list(keyset1)
list1_keyset.sort()
signString1 = ""
for key in list1_keyset:
    split = "" if signString1 == "" else "&"
    signString1 += split + key + "=" + params.get(key)
signString1 = signString1+"&secretKey="+apiSecret #API_SECRET

e.基于UTF-8编码的MD5

#以下为java
String sign = "";
try {
    MessageDigest md = MessageDigest.getInstance("MD5");
    byte[] bytes = md.digest(signString1.getBytes("utf-8"));
    final char[] HEX_DIGITS = "0123456789abcdef".toCharArray();
    StringBuilder ret = new StringBuilder(bytes.length * 2);
    for (int i=0; i<bytes.length; i++) {
	ret.append(HEX_DIGITS[(bytes[i] >> 4) & 0x0f]);
	ret.append(HEX_DIGITS[bytes[i] & 0x0f]);
}
    sign =  ret.toString();
}
#以下为python
from hashlib import md5
sign = ""
try:
    bytes_signString1 = bytes(signString1,'utf-8')
    digest = md5(bytes_signString1).digest()
    HEX_DIGITS = "0123456789abcdef"
    ret = ""
    for item in range(len(bytes_signString1)):
        ret = ret + HEX_DIGITS[(bytes_signString1[item] >> 4 & 0x0f)]
        ret = ret + HEX_DIGITS[bytes_signString1[item] & 0x0f]
    sign = ret

f.封装参数发起POST请求

#以下为java
Map<String,String> reqParams =  new HashMap<String, String>() ;
reqParams.put("apiKey", apiKey) ;    // API_KEY
reqParams.put("a", a) ;              //业务参数。。。
reqParams.put("b", b) ; 
...... 
reqParams.put("tonce", current.toString());
reqParams.put("presign",presign);     //ETH私钥签名 
reqParams.put("sign",sign) ;          //MD5签名
String result = send(url,reqParams, "UTF-8");


// ETH私钥验证，需要用到web3j包
public  static String  ethSign(String passPhrase,String keystore,String signString){
try {
	ObjectMapper objectMapper = ObjectMapperFactory.getObjectMapper();
	JsonParser parser = objectMapper.getFactory().createParser(keystore);
	WalletFile walletFile = objectMapper.readValue(parser, WalletFile.class);
	Credentials cred = Credentials.create(Wallet.decrypt(passPhrase, walletFile));
	ECKeyPair ecKeyPair = cred.getEcKeyPair() ;
	SignatureData sd = Sign.signMessage( signString.getBytes() , ecKeyPair ) ;
	byte[] bytes = new byte[1+32+32];
	bytes[0] = sd.getV();
	System.arraycopy( sd.getR() , 0, bytes, 1, 32);
	System.arraycopy(sd.getS(), 0, bytes, 33, 32);
	String sign = Hex.toHexString(bytes);
	return sign ;
} catch (IOException e) {
	e.printStackTrace();
} catch (CipherException e) {
	e.printStackTrace();
}
return null ;
}

// 发起HTTP POST请求
public static String send(String url, Map<String, String> map, String encoding){
	String body = "";
	CloseableHttpResponse response = null;
	try {
		CloseableHttpClient client = HttpClients.createDefault();
		HttpPost httpPost = new HttpPost(url);
		List<NameValuePair> nvps = new ArrayList<NameValuePair>();
		if (map != null) {
			for (Entry<String, String> entry : map.entrySet()) {
				nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
			}
		}
		httpPost.setEntity(new UrlEncodedFormEntity(nvps, encoding));
		httpPost.setHeader("Content-type", "application/x-www-form-urlencoded");
		httpPost.setHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");

		response = client.execute(httpPost);
		HttpEntity entity = response.getEntity();
		if (entity != null) {
			body = EntityUtils.toString(entity, encoding);
		}
		EntityUtils.consume(entity);
	} catch (IOException e) {

	} finally {
		if (response != null) {
			try {
				response.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
	return body;
}  
#以下为python
reqParams = {"apiKey":apiKey,
    "a":a,
    "b":b,
    "tonce":str(current_milli_time()),
    "presign":presign,
    "sign":sign}
result = send(url,reqParams,"UTF-8")

#// ETH私钥验证，需要用到web3.py包
from web3 import Web3,HTTPProvider
import web3
def ethSign(passPhrase,keystore,signString):