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

How to reverse every other sublist of a list?

Why do UK politicians seemingly ignore opinion polls on Brexit?

Time travel alters history but people keep saying nothing's changed

I see my dog run

Does a dangling wire really electrocute me if I'm standing in water?

Springs with some finite mass

Output the Arecibo Message

Why isn't airport relocation done gradually?

The difference between dialogue marks

What is the best strategy for white in this position?

What is this 4-propeller plane?

Lethal sonic weapons

Manuscript was "unsubmitted" because the manuscript was deposited in Arxiv Preprints

Feasability of miniature nuclear reactors for humanoid cyborgs

Why don't Unix/Linux systems traverse through directories until they find the required version of a linked library?

Where to refill my bottle in India?

"Riffle" two strings

Inversion Puzzle

JSON.serialize: is it possible to suppress null values of a map?

Is domain driven design an anti-SQL pattern?

Why is the maximum length of openwrt’s root password 8 characters?

If the Wish spell is used to duplicate the effect of Simulacrum, are existing duplicates destroyed?

How to answer pointed "are you quitting" questioning when I don't want them to suspect

Can I write a for loop that iterates over both collections and arrays?



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 4 hours ago







      earizon

















      asked 5 hours ago









      earizonearizon

      20419




      20419




















          2 Answers
          2






          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






























            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.




















              Your Answer








              StackExchange.ready(function()
              var channelOptions =
              tags: "".split(" "),
              id: "642"
              ;
              initTagRenderer("".split(" "), "".split(" "), channelOptions);

              StackExchange.using("externalEditor", function()
              // Have to fire editor after snippets, if snippets enabled
              if (StackExchange.settings.snippets.snippetsEnabled)
              StackExchange.using("snippets", function()
              createEditor();
              );

              else
              createEditor();

              );

              function createEditor()
              StackExchange.prepareEditor(
              heartbeatType: 'answer',
              autoActivateHeartbeat: false,
              convertImagesToLinks: false,
              noModals: true,
              showLowRepImageUploadWarning: true,
              reputationToPostImages: null,
              bindNavPrevention: true,
              postfix: "",
              imageUploader:
              brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
              contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
              allowUrls: true
              ,
              onDemand: true,
              discardSelector: ".discard-answer"
              ,immediatelyShowMarkdownHelp:true
              );



              );













              draft saved

              draft discarded


















              StackExchange.ready(
              function ()
              StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fethereum.stackexchange.com%2fquestions%2f69473%2fany-good-smartcontract-for-business-calendar-oracles%23new-answer', 'question_page');

              );

              Post as a guest















              Required, but never shown

























              2 Answers
              2






              active

              oldest

              votes








              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 4 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




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









                          answered 1 hour ago









                          GreenSockMonkeyGreenSockMonkey

                          111




                          111




                          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.





                          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.






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



























                              draft saved

                              draft discarded
















































                              Thanks for contributing an answer to Ethereum Stack Exchange!


                              • Please be sure to answer the question. Provide details and share your research!

                              But avoid


                              • Asking for help, clarification, or responding to other answers.

                              • Making statements based on opinion; back them up with references or personal experience.

                              To learn more, see our tips on writing great answers.




                              draft saved


                              draft discarded














                              StackExchange.ready(
                              function ()
                              StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fethereum.stackexchange.com%2fquestions%2f69473%2fany-good-smartcontract-for-business-calendar-oracles%23new-answer', 'question_page');

                              );

                              Post as a guest















                              Required, but never shown





















































                              Required, but never shown














                              Required, but never shown












                              Required, but never shown







                              Required, but never shown

































                              Required, but never shown














                              Required, but never shown












                              Required, but never shown







                              Required, but never shown







                              Popular posts from this blog

                              名間水力發電廠 目录 沿革 設施 鄰近設施 註釋 外部連結 导航菜单23°50′10″N 120°42′41″E / 23.83611°N 120.71139°E / 23.83611; 120.7113923°50′10″N 120°42′41″E / 23.83611°N 120.71139°E / 23.83611; 120.71139計畫概要原始内容臺灣第一座BOT 模式開發的水力發電廠-名間水力電廠名間水力發電廠 水利署首件BOT案原始内容《小檔案》名間電廠 首座BOT水力發電廠原始内容名間電廠BOT - 經濟部水利署中區水資源局

                              Prove that NP is closed under karp reduction?Space(n) not closed under Karp reductions - what about NTime(n)?Class P is closed under rotation?Prove or disprove that $NL$ is closed under polynomial many-one reductions$mathbfNC_2$ is closed under log-space reductionOn Karp reductionwhen can I know if a class (complexity) is closed under reduction (cook/karp)Check if class $PSPACE$ is closed under polyonomially space reductionIs NPSPACE also closed under polynomial-time reduction and under log-space reduction?Prove PSPACE is closed under complement?Prove PSPACE is closed under union?

                              Is my guitar’s action too high? Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 23, 2019 at 23:30 UTC (7:30pm US/Eastern)Strings too stiff on a recently purchased acoustic guitar | Cort AD880CEIs the action of my guitar really high?Μy little finger is too weak to play guitarWith guitar, how long should I give my fingers to strengthen / callous?When playing a fret the guitar sounds mutedPlaying (Barre) chords up the guitar neckI think my guitar strings are wound too tight and I can't play barre chordsF barre chord on an SG guitarHow to find to the right strings of a barre chord by feel?High action on higher fret on my steel acoustic guitar