currency rates, on Arweave

currency rates, on Arweave

• hourly updates
• uses https://openexchangerates.org (the free tier plan, limited to ~1 api call per hour)

People should query using ARQL for the latest file like this

Tip: you can use https://ibwslcweo3rb.arweave.net/1w40L6Z8WLrRTZiBRcp4qMPaMuJfblUlB9pqovkh5PQ if you want to quickly test it

{
  op: 'and',
  expr1: {
    op: 'equals',
    expr1: 'from',
    expr2: 'hjCuCtTDySi9_KNtRxmPIsAyYVrTXeJZNP3R1aHfNPg'
  },
  expr2: {
    op: 'equals',
    expr1: 'TIME-HOUR',
    expr2: '2019-11-17T15'
  }
}

Since it updates hourly, I've added a tag called "TIME-HOUR"

TIME-HOUR represents the first part of the ISO8601 time formatting (UTC) so get the unix time, transform it to ISO8601, and leave just the date & hours

If you think of a better way to do this, let me know

• step 1: think about how would people query your datafeed
• step 2: check the logic under sync.go.
• step 3: reuse the config file & the push to arweave functions

If you want to use this as a template for your project, for whatever reason, it's simple

• edit the config file
• check the logic under sync.go

{
  "debug": true,
  "nodeURL": "https://arweave.net",
  "appID": "YOUR_OPENEXCHANGERATES_ORG_APPID_HERE",
  "walletFile": "/PATH/TO/YOUR/arweave-wallet.json",
  "server": {
    "host": "localhost",
    "port": 5555
  }
}

Where:

• debug run with move verbosity
• nodeURL the arweave node url
• appID the https://openexchangerates.org APP ID
• walletFile the location of the wallet.json file
• server ip & port where this service should run

https://github.com/Dev43/arweave-go -> for the transaction signing & transmitting code

fell free to create an issue

• tags
• awaiting your idea

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💰 Arweave Currency Datafeed is released under the MIT license.