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The fromUtf8 function, also known as utf8ToHex, takes a string input str and converts it into a hexadecimal string. The function is a part of the web3-utils library and is designed to be used with the Ethereum blockchain.
The fromUtf8 function converts each character of the input string into its corresponding hexadecimal value, using the UTF-8 character set. This allows for the representation of a wide range of characters, including non-ASCII characters, in a hexadecimal format that can be easily used with the Ethereum blockchain.
The function returns a string representing the hexadecimal value of the input string. This string can be used in a variety of contexts, such as in smart contracts, hash functions, and other cryptographic applications.
Here's an example of how the fromUtf8 function can be used:
In this example, the fromUtf8 function takes a string str and returns a hexadecimal string representation of the input. The resulting hex string can be used in a variety of contexts, such as in smart contracts, hash functions, and other cryptographic applications.