Price Oracle Subscription

price_oracle is a subscribable process which sends the notification to the subscribers on every price update.

Tutorial Video

Tools Utilized

• Off-chain price for $AR is being fetched using 0rbit.
• The subscription on an AO process was implemented by the Subscribable Package by Autonomous Finance.
• apm-tool was used to install subscribable and 0rbit package.
• betterIDEa was used to test the process.

How to Start

Step 1: Price Oracle Subscribable Process [Terminal 1]

1. Start AOS

   aos price_oracle

2. Load price_oracle.lua file in your process

   .load price_oracle.lua

3. Fund price_oracle process Id with $0RBT

   • DM @megabyte0x or @lucifer0x17 or @0rbit to get $0RBT

Step 2: Subscribing to Price Oracle Subscribable Process [Terminal 2]

1. Start AOS

   aos subscriber

2. Send the message to Register-Subscriber

   Send({
       Target = <PRICE_ORACLE_PROCESS_ID>,
       Action = 'Register-Subscriber',
       Topics = json.encode({ 'price-update' })
   })

3. Fund the Subscriber process ID with $0RBT

4. Send the message to Pay-For-Subscription

   send({
           Target = 0RBT,
           Action = 'Transfer',
           Recipient =  <PRICE_ORACLE_PROCESS_ID>,
           Quantity = "1000000000000",
           ["X-Action"] = "Pay-For-Subscription",
           ["X-Subscriber-Process-Id"] = ao.id
       })

Step 3: Updating the price [Terminal 1]

1. Send the message to update the price

   Send({Target = ao.id, Action="UpdatePrice"})

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After following the above steps you will receive a message on Terminal 2 (Subscriber Process) with updated price.

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Subscription Overview

Register Subscriber

Pay for Subscription