CODEWITHSUNDEEP
cryptographyblockchainethereumchainlink
GN.
GN.

Reputation: 9839

Format Chainlink AggregatorV3Interface 'answer' to USD?

From the docs, AggregatorV3Interface returns..

Return Values
roundId: The round ID.
answer: The price.
startedAt: Timestamp of when the round started.
updatedAt: Timestamp of when the round was updated.
answeredInRound: The round ID of the round in which the answer
was computed.

Also it is stated that answer is an int256.

I'm getting back the value 120160203575.

which is the USD as unit8.

How do you format this unit8 into a USD formatted number? (e.g. $1201.00)..formatted with decimal and chopping off the unneeded decimal places?

Upvotes: 1

Views: 606

Answers (1)

GN.
GN.

Reputation: 9839

Figured it out. Chainlink can return decimals along with the answer.

 function getLatestPrice() public view returns (int, uint8) {
    (
      uint80 roundID,
      int price,
      uint startedAt,
      uint timeStamp,
      uint80 answeredInRound
  ) = priceFeed.latestRoundData();

    uint8 decimals = priceFeed.decimals();
    return (price, decimals);
  }

Upvotes: 1

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