Error dataSha256: 32 byte buffer requred, eosjs-ecc. How to decide?

Question

JavaScript

There is a function

const data = ecc.sha256(value)
return ecc.signHash(data, key, 'base64'))

As a result I get

Error: dataSha256: 32 byte buffer requred
    at Function.push../node_modules/eosjs-ecc/lib/signature.js.Signature.signHash (signature.js:239)
    at Object.signHash (api_common.js:136)
    at createSign (KeyUtils.ts:27)
    at AuthService.ts:12

There is a well-known Buffer.alloc(32, 0) command, how to link them?

Answer 1

The output turned out to be a simple btoa(ecc.signHash(ecc.sha256(value), key)) and no buffer needed