Mrthdrb

How does ice melt when immersed in water

What can I do if neighbor is blocking my solar panels intentionally?

Hopping to infinity along a string of digits

Road tyres vs "Street" tyres for charity ride on MTB Tandem

How are presidential pardons supposed to be used?

Are my PIs rude or am I just being too sensitive?

Mortgage adviser recommends a longer term than necessary combined with overpayments

How did the audience guess the pentatonic scale in Bobby McFerrin's presentation?

Are spiders unable to hurt humans, especially very small spiders?

Is above average number of years spent on PhD considered a red flag in future academia or industry positions?

How does this infinite series simplify to an integral?

How to pronounce 1ターン?

Why can't wing-mounted spoilers be used to steepen approaches?

Did the UK government pay "millions and millions of dollars" to try to snag Julian Assange?

What is special about square numbers here?

Segmentation fault output is suppressed when piping stdin into a function. Why?

Why can't devices on different VLANs, but on the same subnet, communicate?

Semisimplicity of the category of coherent sheaves?

He got a vote 80% that of Emmanuel Macron’s

Was credit for the black hole image misattributed?

Change bounding box of math glyphs in LuaTeX

How do you keep chess fun when your opponent constantly beats you?

Finding the path in a graph from A to B then back to A with a minimum of shared edges

In horse breeding, what is the female equivalent of putting a horse out "to stud"?

Any good smartcontract for “business calendar” oracles?

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.

oracles calendar

share|improve this question

edited Apr 9 at 19:45

earizon

asked Apr 9 at 19:10

earizonearizon

204110

add a comment | 

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.

oracles calendar

share|improve this question

edited Apr 9 at 19:45

earizon

asked Apr 9 at 19:10

earizonearizon

204110

add a comment | 

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

edited Apr 9 at 19:45

earizon

asked Apr 9 at 19:10

earizonearizon

204110

share|improve this question

edited Apr 9 at 19:45

earizon

asked Apr 9 at 19:10

earizonearizon

204110

share|improve this question

edited Apr 9 at 19:45

earizon

asked Apr 9 at 19:10

earizonearizon

204110

asked Apr 9 at 19:10

earizonearizon

204110

asked Apr 9 at 19:10

earizonearizon

204110

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

answered Apr 9 at 19:32

Mikko OhtamaaMikko Ohtamaa

7,22731958

add a comment | 

2

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

share|improve this answer

answered Apr 9 at 23:00

GreenSockMonkeyGreenSockMonkey

211

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.

add a comment | 

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

Sign up or log in

StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name

Email

Required, but never shown

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

Name

Email

Required, but never shown

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

answered Apr 9 at 19:32

Mikko OhtamaaMikko Ohtamaa

7,22731958

add a comment | 

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

answered Apr 9 at 19:32

Mikko OhtamaaMikko Ohtamaa

7,22731958

add a comment | 

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

answered Apr 9 at 19:32

Mikko OhtamaaMikko Ohtamaa

7,22731958

share|improve this answer

answered Apr 9 at 19:32

Mikko OhtamaaMikko Ohtamaa

7,22731958

answered Apr 9 at 19:32

Mikko OhtamaaMikko Ohtamaa

7,22731958

answered Apr 9 at 19:32

Mikko OhtamaaMikko Ohtamaa

7,22731958

2

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

share|improve this answer

answered Apr 9 at 23:00

GreenSockMonkeyGreenSockMonkey

211

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.

add a comment | 

2

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

share|improve this answer

answered Apr 9 at 23:00

GreenSockMonkeyGreenSockMonkey

211

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.

add a comment | 

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

share|improve this answer

answered Apr 9 at 23:00

GreenSockMonkeyGreenSockMonkey

211

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

answered Apr 9 at 23:00

GreenSockMonkeyGreenSockMonkey

211

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 Apr 9 at 23:00

GreenSockMonkeyGreenSockMonkey

211

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 Apr 9 at 23:00

GreenSockMonkeyGreenSockMonkey

211