How can I do console logging of an array or struct using 'hardhat/console.sol'?

Question

I am simply trying to console.log the array in solidity using 'hardhat/console.sol'

uint8[3] memory myArr = [1,2,43]; console.log(myArr);

I am facing below error:

TypeError: Member "log" not found or not visible after argument-dependent lookup in type(library console).

Answer 1

I haven't been using hardhat console for a while, but I do not remember I had an issue with it except it was used only for single values - not arrays or structs. Please double check the official documentation.

I would also suggest to do a test coverage for your use case, this approach made console log almost redundant. This is part of docs which covers this topic.

Answer 2

You're seeing this issue because the function log(uint8[] memory) doesn't exist. Read through the hardhat/console.sol implementation to see the available functions.

The simplest way to do what you want is probably to loop over the array, casting each entry to a uint256, and call console.log(value) (the full signature being log(uint256)) for each entry.

Answer 3

The error you are encountering is due to the fact that the console.sol library does not have a function with the name log. To log an array in Solidity, you can use a loop and log each element individually. Here's an example:

uint8[3] memory myArr = [1,2,43]; for (uint8 i = 0; i < myArr.length; i++) { console.log(myArr[i]); }

Alternatively, you can convert the array to a string and log the entire string using console.log(abi.encodePacked(myArr)). Note that this method may not work if the array contains non-primitive values.