April 15, 2025
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There are 2 endpoints that generate hash:

are invoked with POST

the length of the first hash is configured.

After the first hash, a hash is taken to generate another hash, its length is the hash that is taken as a base, the length cannot be changed.

The “timestamp” field is calculated automatically and returned in the response.

POST http://localhost:8080/not-configurable/first-hash

the first hash takes a BigDecimal pivot, pivot is BigDecimal

For the first hash, “previous_order” is null, since there is no previous.

“digits” is the length of the generated hash, an int.

“current_hash” is the new generated hash.

“current_order” in the response is “new_order” in the request.

The order is a logical order like String, each hash has an order.

request

    {
     "new_order":"abc",
     "previous_order": null,
     "digits":100,
     "pivot":"1.012345678912"
    }

response:

{
    "timestamp": 1744685700285,
    "length": 100,
    "current_hash": "_@#_!/#=@--@+-_/%-/@=+%_@**%!+#--!!*@%_%/#/!*@/%#@==%#%%_%%_##/_/-///!*%#*@=_+@_@@!!##%_%%-%@!-*!*#+",
    "previous_hash": null,
    "current_order": "abc"
}

generate a new hash based on another:

POST http://localhost:8080/not-configurable/new-hash

request:

{
      "current_hash": "_@#_!/#=@--@+-_/%-/@=+%_@**%!+#--!!*@%_%/#/!*@/%#@==%#%%_%%_##/_/-///!*%#*@=_+@_@@!!##%_%%-%@!-*!*#+",
      "previous_hash":null,
      "new_order":"abd"
}

response:

{
    "timestamp": 1744685978788,
    "length": 100,
    "current_hash": "#!+_*=%##-#=_@@!==*/@#_+==__-%_+#/+#@*_%#+=@#++#=-+##_%*-@-!/**-*%#_*==!_!-=-/=#!+!-*@=!%+/___-%@*//",
    "previous_hash": "_@#_!/#=@--@+-_/%-/@=+%_@**%!+#--!!*@%_%/#/!*@/%#@==%#%%_%%_##/_/-///!*%#*@=_+@_@@!!##%_%%-%@!-*!*#+",
    "current_order": "abd"
}

The link to the repository is:

https://gitlab.com/com.leibnix/hash-apirest

It is a REST API so it listens on port 8080 on localhost.

executes the MyApplication class.

or the direct .jar:

 java -jar jueguito-0.0.1-SNAPSHOT.jar

If you have port 8080 busy you must kill the process

Identify the process listening on port 8080:

lsof -i :8080

the output is:

You will have the process number in the PID column

COMMAND   PID        USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
java    37101 axelarrondo    9u  IPv6 0x937db5c0f698f007      0t0  TCP *:http-alt (LISTEN)

kill the PID

kill -9 37101

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