A function whose declared type is neither 'void' nor 'any' must return a value.

The solution for “A function whose declared type is neither ‘void’ nor ‘any’ must return a value.” can be found here. The following code will assist you in solving the problem.

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// You probably do it like that

import { JSHash, CONSTANTS } from “react-native-hash”;
async function hashSha1(param1: string): Promise {

    await JSHash(`${param1}`, CONSTANTS.HashAlgorithms.sha1)

    .then(hash => {

        return hash  // Promise returned this case

    })

    .catch(e => console.log(e));  // You do not return this case so promise give error

}
// Then avoid of error all ways needs to be return

import { JSHash, CONSTANTS } from “react-native-hash”;
async function hashSha1(param1: string): Promise {

    const hash = await JSHash(`${param1}`, CONSTANTS.HashAlgorithms.sha1)

    return hash  // Promise returned

}  // So all promises returned

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