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Any good smartcontract for “business calendar” oracles?



The 2019 Stack Overflow Developer Survey Results Are InWhat are the most important potential attack vectors on oracles?Aren't oracles extremely data consuming?Can oracles send data to smart contracts on multiple blockchains?What is the difference from oracles and smart oracles?Can any smart contract be forked?Oracles and randomness, Creating or solving problems?How does Ethereum handle undeterministic results from oracles?What's the best realized dapps for fair betting without oracles?How to know the price of the day of ETH in USD by Oracles?Tutorial to understand technical details of Oracles in Ethereum










1















is anybody aware of some smart-contract that can be used as external "trustable" oracle for no-so-simple scenarios, like for example calculating the number of non-festive days passed since a given date or time-windows.



I'm thinking of some external (trusted) entity that is allowed to fill such calendar and sign when a new day has passed, ...



I'm thinking about use-cases like:
- Some smart-contract internal state change or some payment must be allowed just after 10 working days, excluding weekends.










share|improve this question




























    1















    is anybody aware of some smart-contract that can be used as external "trustable" oracle for no-so-simple scenarios, like for example calculating the number of non-festive days passed since a given date or time-windows.



    I'm thinking of some external (trusted) entity that is allowed to fill such calendar and sign when a new day has passed, ...



    I'm thinking about use-cases like:
    - Some smart-contract internal state change or some payment must be allowed just after 10 working days, excluding weekends.










    share|improve this question


























      1












      1








      1








      is anybody aware of some smart-contract that can be used as external "trustable" oracle for no-so-simple scenarios, like for example calculating the number of non-festive days passed since a given date or time-windows.



      I'm thinking of some external (trusted) entity that is allowed to fill such calendar and sign when a new day has passed, ...



      I'm thinking about use-cases like:
      - Some smart-contract internal state change or some payment must be allowed just after 10 working days, excluding weekends.










      share|improve this question
















      is anybody aware of some smart-contract that can be used as external "trustable" oracle for no-so-simple scenarios, like for example calculating the number of non-festive days passed since a given date or time-windows.



      I'm thinking of some external (trusted) entity that is allowed to fill such calendar and sign when a new day has passed, ...



      I'm thinking about use-cases like:
      - Some smart-contract internal state change or some payment must be allowed just after 10 working days, excluding weekends.







      oracles calendar






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited 7 hours ago







      earizon

















      asked 7 hours ago









      earizonearizon

      20419




      20419




















          2 Answers
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          2














          Oracle sounds complicated and gas gushing approach.



          I suggest this:



          • A special transaction parameter be generated and signed by your own server


          • The server calculates the days


          • The information is passed into the smart contract in the transaction payload, as a function parameter


          • The smart contract verifies that the result is honest by checking the signature of the parameter, so that it was your server that made the calculation


          However, for better judgement, I kindly ask you to edit your question and add more background information about your business case.






          share|improve this answer






























            1














            Chainlink may be what you’re looking for: https://chain.link






            share|improve this answer








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              2 Answers
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              2 Answers
              2






              active

              oldest

              votes









              active

              oldest

              votes






              active

              oldest

              votes









              2














              Oracle sounds complicated and gas gushing approach.



              I suggest this:



              • A special transaction parameter be generated and signed by your own server


              • The server calculates the days


              • The information is passed into the smart contract in the transaction payload, as a function parameter


              • The smart contract verifies that the result is honest by checking the signature of the parameter, so that it was your server that made the calculation


              However, for better judgement, I kindly ask you to edit your question and add more background information about your business case.






              share|improve this answer



























                2














                Oracle sounds complicated and gas gushing approach.



                I suggest this:



                • A special transaction parameter be generated and signed by your own server


                • The server calculates the days


                • The information is passed into the smart contract in the transaction payload, as a function parameter


                • The smart contract verifies that the result is honest by checking the signature of the parameter, so that it was your server that made the calculation


                However, for better judgement, I kindly ask you to edit your question and add more background information about your business case.






                share|improve this answer

























                  2












                  2








                  2







                  Oracle sounds complicated and gas gushing approach.



                  I suggest this:



                  • A special transaction parameter be generated and signed by your own server


                  • The server calculates the days


                  • The information is passed into the smart contract in the transaction payload, as a function parameter


                  • The smart contract verifies that the result is honest by checking the signature of the parameter, so that it was your server that made the calculation


                  However, for better judgement, I kindly ask you to edit your question and add more background information about your business case.






                  share|improve this answer













                  Oracle sounds complicated and gas gushing approach.



                  I suggest this:



                  • A special transaction parameter be generated and signed by your own server


                  • The server calculates the days


                  • The information is passed into the smart contract in the transaction payload, as a function parameter


                  • The smart contract verifies that the result is honest by checking the signature of the parameter, so that it was your server that made the calculation


                  However, for better judgement, I kindly ask you to edit your question and add more background information about your business case.







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered 7 hours ago









                  Mikko OhtamaaMikko Ohtamaa

                  7,20231958




                  7,20231958





















                      1














                      Chainlink may be what you’re looking for: https://chain.link






                      share|improve this answer








                      New contributor




                      GreenSockMonkey is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                      Check out our Code of Conduct.
























                        1














                        Chainlink may be what you’re looking for: https://chain.link






                        share|improve this answer








                        New contributor




                        GreenSockMonkey is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                        Check out our Code of Conduct.






















                          1












                          1








                          1







                          Chainlink may be what you’re looking for: https://chain.link






                          share|improve this answer








                          New contributor




                          GreenSockMonkey is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                          Check out our Code of Conduct.










                          Chainlink may be what you’re looking for: https://chain.link







                          share|improve this answer








                          New contributor




                          GreenSockMonkey is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                          Check out our Code of Conduct.









                          share|improve this answer



                          share|improve this answer






                          New contributor




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                          answered 3 hours ago









                          GreenSockMonkeyGreenSockMonkey

                          111




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