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Signature Algorithm

  1. From the request parameters, exclude sign and all parameters with null or empty values. Then, sort the remaining parameters lexicographically.
Lexicographical Definition: In English dictionaries, words are arranged in order of the first letter (i.e., in the sequence a, b, c… z). If the first letter is the same, compare the second, third, and subsequent letters. If by the end the two words are of different lengths (e.g., “sigh” and “sight”), place the shorter one first.
  1. After sorting, concatenate the parameters in the format “key1value1key2value2...”.
  2. Prepend the API Key to the string obtained from step 2.
  3. Convert the string from step 3 into an md5 hash, in lowercase, to get the sign. Include this sign in the request parameters.

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Signature Example

step 1 Assuming the API Key is: 
f502a9ac9ca54327986f29c03b271491
The request parameters excluding the ‘sign’ field are: 
{
  "pid": 1382528827416576,
  "currency": "195@195",
  "address": "TXsmKpEuW7qWnXzJLGP9eDLvWPR2GRn1FS",
  "amount": "1.1",
  "remark": "payout",
  "third_party_id": "c9231e604da54469a735af3f449c880f",
  "callback_url": "http://192.168.2.29:9099/callback",
  "nonce": "hwlkk6",
  "timestamp": 1688004243314
}
step 2 Sort and combine the non-empty key-value pairs in dictionary order: 
addressTXsmKpEuW7qWnXzJLGP9eDLvWPR2GRn1FSamount1.1callback_urlhttp://192.168.2.29:9099/callbackcurrency195@195noncehwlkk6pid1382528827416576remarkpayoutthird_party_idc9231e604da54469a735af3f449c880ftimestamp1688004243314
step 3 Concatenate the API key to the string from the previous step: 
f502a9ac9ca54327986f29c03b271491addressTXsmKpEuW7qWnXzJLGP9eDLvWPR2GRn1FSamount1.1callback_urlhttp://192.168.2.29:9099/callbackcurrency195@195noncehwlkk6pid1382528827416576remarkpayoutthird_party_idc9231e604da54469a735af3f449c880ftimestamp1688004243314
step 4 Calculate the MD5 hash of the resulting string. The computed ‘sign’ value is: 
c9bae061ae3f5f8d3bfde817f6966c36
final step Add the computed ‘sign’ value to the original request parameters: 
{
  "pid": 1382528827416576,
  "currency": "195@195",
  "address": "TXsmKpEuW7qWnXzJLGP9eDLvWPR2GRn1FS",
  "amount": "1.1",
  "remark": "payout",
  "third_party_id": "c9231e604da54469a735af3f449c880f",
  "callback_url": "http://192.168.2.29:9099/callback",
  "nonce": "hwlkk6",
  "timestamp": 1688004243314,
  "sign": "d6eef2de79e39f434a38efb910213ba6"
}