Actions

EACAggregatorProxy Reads

From Chainlink Community Wiki

Revision as of 16:10, 24 May 2022 by Devtrace (talk | contribs)

EACAggregatorProxy

LINK / USD EAC AggregatorProxy contract address: 0x2c1d072e956affc0d435cb7ac38ef18d24d9127c

The Access Controlled Aggregator Proxy is a proxy contract that enables the owner to point it to other contracts as needed/desired.

This prevents the users from having to update anything if they wanted to move to a new contract version/release

Read Calls

This page contains all of the read calls you can make to the EACAggregatorProxy contracts.

If you'd like to check out the write calls, please check the EACAggregatorProxy_Writes page.

accessController

The accessController is a smart contract that acts as a whitelist for which addresses are able to call the contract. For the LINK / USD price feed, the referenced accessController smart contract is a null value set to 0x0000000000000000000000000000000000000000

  • Example Query:
    • ACCESS_CONTROLLER=$(curl -s -H "Content-Type: application/json" https://$YOUR_RPC_ENDPOINT -d '{"jsonrpc": "2.0", "id": 123, "method": "eth_call", "params":[{"from":null,"to":"0x2c1d072e956AFFC0D435Cb7AC38EF18d24d9127c","data":"0xbc43cbaf"}, "latest"]}' | jq -r .result) && echo "$ACCESS_CONTROLLER"
  • Example Response:
    • 0x0000000000000000000000000000000000000000000000000000000000000000
      • (remove leading 24 0's)
aggregator

The aggregator is the on-chain contract that each of the Chainlink Nodes responds to. The AggregatorProxy contract points to the configured Aggregator as it's primary source of information

  • Example Query:
    • AGGREGATOR=$(curl -s -H "Content-Type: application/json" https://$YOUR_RPC_ENDPOINT -d '{"jsonrpc": "2.0", "id": 123, "method": "eth_call", "params":[{"from":null,"to":"0x2c1d072e956AFFC0D435Cb7AC38EF18d24d9127c","data":"0x245a7bfc"}, "latest"]}' | jq -r .result) && echo "$AGGREGATOR"
  • Example Response:
    • 0x000000000000000000000000dfd03bfc3465107ce570a0397b247f546a42d0fa
      • (remove leading 24 0's)
decimals

The decimals value tells the reader of the contract how many decimal places they need to adjust to get the proper value.

For example, if the LINK / USD price feed has a decimlas value of 8, and the latest round shows a response of 726792272, then we would shift the decimal 8 places to end with a value of 7.26792272.

  • Example Request:
    • DECIMALS=$(curl -s -H "Content-Type: application/json" https://$YOUR_RPC_ENDPOINT -d '{"jsonrpc": "2.0", "id": 123, "method": "eth_call", "params":[{"from":null,"to":"0x2c1d072e956AFFC0D435Cb7AC38EF18d24d9127c","data":"0x313ce567"}, "latest"]}' | jq -r .result) && echo "$((DECIMALS))"
  • Example Response:
    • 8
description

The desctiption of the Proxy is just a friendly name, in this case displaying LINK / USD*Example Query:

  • Example Request:
    • DESCRIPTION=$(curl -s -H "Content-Type: application/json" https://$YOUR_RPC_ENDPOINT -d '{"jsonrpc": "2.0", "id": 123, "method": "eth_call", "params":[{"from":null,"to":"0x2c1d072e956AFFC0D435Cb7AC38EF18d24d9127c","data":"0x7284e416"}, "latest"]}' | jq -r .result) && echo $DESCRIPTION | xxd -r -p
  • Example Response:
    • LINK / USD
getAnswer

This call will provide you with the data for the round you have specified.

  • Example Request:
    • GET_ANSWER=$(curl -s -H "Content-Type: application/json" https://$YOUR_RPC_ENDPOINT -d '{"jsonrpc": "2.0", "id": 123, "method": "eth_call", "params":[{"from":null,"to":"0x2c1d072e956AFFC0D435Cb7AC38EF18d24d9127c","data":"0xb5ab58dc000000000000000000000000000000000000000000000005000000000000347a"}, "latest"]}' | jq -r .result) && echo "$((GET_ANSWER))"
  • Example Response
    • 726792272
getRoundData

Similar to the above getAnswer call, this call will get additional information from the round you have specified.*Example Query:

  • Example Request
    • curl -s -H "Content-Type: application/json" https://$YOUR_RPC_ENDPOINT -d '{"jsonrpc": "2.0", "id": 123, "method": "eth_call", "params":[{"from":null,"to":"0x2c1d072e956AFFC0D435Cb7AC38EF18d24d9127c","data":"0x9a6fc8f50000000000000000000000000000000000000000000000050000000000003493"}, "latest"]}' | jq -r .result
  • Example Response
    • 0x000000000000000000000000000000000000000000000005000000000000349300000000000000000000000000000000000000000000000000000000287aa86900000000000000000000000000000000000000000000000000000000628ce73900000000000000000000000000000000000000000000000000000000628ce7390000000000000000000000000000000000000000000000050000000000003493
  • Converting the Response to Legible Values
    • roundId
      • uint80
      • 0000000000000000000000000000000000000000000000050000000000003493
        • roundId = 92233720368547771539
    • answer
      • int256 00000000000000000000000000000000000000000000000000000000287aa869
        • answer = 679127145
    • startedAt
      • uint256
      • 00000000000000000000000000000000000000000000000000000000628ce739
        • startedAt = 1653401401
    • updatedAt
      • uint256
      • 00000000000000000000000000000000000000000000000000000000628ce739
        • updatedAt = 1653401401
    • answeredInRound
      • uint80
      • 0000000000000000000000000000000000000000000000050000000000003493
        • answeredInRound = 92233720368547771539
getTimestamp

This getTimestamp call will provide you with the timestamp of the block containing the data from the round you have specified.

  • Example Request:
    • GET_TIMESTAMP=$(curl -s -H "Content-Type: application/json" https://$YOUR_RPC_ENDPOINT -d '{"jsonrpc": "2.0", "id": 123, "method": "eth_call", "params":[{"from":null,"to":"0x2c1d072e956AFFC0D435Cb7AC38EF18d24d9127c","data":"0xb633620c000000000000000000000000000000000000000000000005000000000000347a"}, "latest"]}' | jq -r .result) && LOCALTIME=$((GET_TIMESTAMP)) && date -d @$LOCALTIME
  • Example Response
    • Mon 23 May 2022 03:47:51 PM CDT
latestAnswer

The latestAnswer call provides you with the value that was written to chain during the most recent completed round

  • Example Request:
    • LATEST_ANSWER=$(curl -s -H "Content-Type: application/json" https://$YOUR_RPC_ENDPOINT -d '{"jsonrpc": "2.0", "id": 123, "method": "eth_call", "params":[{"from":null,"to":"0x2c1d072e956AFFC0D435Cb7AC38EF18d24d9127c","data":"0x50d25bcd"}, "latest"]}' | jq -r .result) && echo "$((LATEST_ANSWER))"
  • Example Response
    • 701697722
latestRound

This call will provide you with the most recent completed round number.

  • Example Request:
    • LATEST_ROUND=$(curl -s -H "Content-Type: application/json" https://$YOUR_RPC_ENDPOINT -d '{"jsonrpc": "2.0", "id": 123, "method": "eth_call", "params":[{"from":null,"to":"0x2c1d072e956AFFC0D435Cb7AC38EF18d24d9127c","data":"0x668a0f02"}, "latest"]}' | jq -r .result) && echo "$((LATEST_ROUND))"
  • Example Response
    • 13462
latestRoundData

This call is similar to getRoundData, but it will automatically get the round data for the most recently completed round.

  • Example Request:
    • curl -s -H "Content-Type: application/json" https://$YOUR_RPC_ENDPOINT -d '{"jsonrpc": "2.0", "id": 123, "method": "eth_call", "params":[{"from":null,"to":"0x2c1d072e956AFFC0D435Cb7AC38EF18d24d9127c","data":"0xfeaf968c"}, "latest"]}' | jq -r .result
  • Example Response
    • asdf
latestTimestamp

Similar to latestRoundData and getTimestamp, the latestTimestamp call will provide you with the timestamp of the block containing the response from the latest completed round.

  • Example Request:
    • curl
  • Example Response
    • 0x00000000000000000000000000000000000000000000000500000000000034960000000000000000000000000000000000000000000000000000000029d30eba00000000000000000000000000000000000000000000000000000000628cfe6400000000000000000000000000000000000000000000000000000000628cfe640000000000000000000000000000000000000000000000050000000000003496
  • Converting the Response to Legible Values
    • roundId
      • uint80
      • 0000000000000000000000000000000000000000000000050000000000003496
        • roundId = 92233720368547771542
    • answer
      • int256 0000000000000000000000000000000000000000000000000000000029d30eba
        • answer = 701697722
    • startedAt
      • uint256
      • 00000000000000000000000000000000000000000000000000000000628cfe64
        • startedAt = 1653407332
    • updatedAt
      • uint256
      • 00000000000000000000000000000000000000000000000000000000628cfe64
        • updatedAt = 1653407332
    • answeredInRound
      • uint80
      • 0000000000000000000000000000000000000000000000050000000000003496
        • answeredInRound = 92233720368547771542
owner

The owner query will respond with the address that has ownership of the contract you query.

  • Example Request:
    • curl -s -H "Content-Type: application/json" https://$YOUR_RPC_ENDPOINT -d '{"jsonrpc": "2.0", "id": 123, "method": "eth_call", "params":[{"from":null,"to":"0x2c1d072e956AFFC0D435Cb7AC38EF18d24d9127c","data":"0x8da5cb5b"}, "latest"]}' | jq -r .result
  • Example Response
    • 0x00000000000000000000000021f73d42eb58ba49ddb685dc29d3bf5c0f0373ca
      • (remove leading 24 0's)
phaseAggregators
phaseId
proposedAggregator

The proposedAggregator query will give you the address of the proposed aggregator, if there is one.

  • Example Request:
    • curl -s -H "Content-Type: application/json" https://$YOUR_RPC_ENDPOINT -d '{"jsonrpc": "2.0", "id": 123, "method": "eth_call", "params":[{"from":null,"to":"0x2c1d072e956AFFC0D435Cb7AC38EF18d24d9127c","data":"0xe8c4be30"}, "latest"]}' | jq -r .result
  • Example Response
    • 0x0000000000000000000000000000000000000000000000000000000000000000
      • (remove leading 24 0's)
proposedGetRoundData

This call provides you with the round data for the requested round from the proposed aggregator, if there is one.

  • Because the proposedAggregator is a zero'd out value, this call will not provide a response
proposedLatestRoundData

Similar to the above, this call will get you the data from the latest round of the proposed aggregator.

  • Because the proposedAggregator is a zero'd out value, this call will not provide a response
version

This gets you the version of the contract you're querying.

  • Example Request:
    • VERSION=$(curl -s -H "Content-Type: application/json" https://$YOUR_RPC_ENDPOINT -d '{"jsonrpc": "2.0", "id": 123, "method": "eth_call", "params":[{"from":null,"to":"0x2c1d072e956AFFC0D435Cb7AC38EF18d24d9127c","data":"0x54fd4d50"}, "latest"]}' | jq -r .result) && echo "$((VERSION))"
  • Example Response
    • 4
Retrieved from "https://wiki.dextrac.com:3443/index.php?title=EACAggregatorProxy_Reads&oldid=2752"