When viewing a neuron on NNS dapp, the get_neuron request is sent to fetch the details of the neuron. But the request payload contains an array of number for the neuron ID instead of string ID:
How can I do thing conversion manually in JS?
These numbers are the same as the blob in your other forum post: Convert IDL blob to string
In Candid a vec nat8 is the same as a blob. Each number represents a value between 0 and 255, which is a byte within an array of bytes.
Looking at the NNS screenshot, the id looks like a hexadecimal string for these bytes.
In JS you could convert decimals to hex like this:
const hexString = yourByteNumberArray.map(byte => byte.toString(16).padStart(2, '0')).join('');
The other way around would be:
const byteNumberArray = hexString.match(/.{1,2}/g).map(hex => parseInt(hex, 16));
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You find these kind of utilities used by NNS dapp in @dfinity/utils (https://github.com/dfinity/ic-js/tree/main/packages/utils).
- convertStringToE8s
- defaultAgent
- createAgent
- createServices
- assertNonNullish
- assertPercentageNumber
- uint8ArrayToBigInt
- bigIntToUint8Array
- numberToUint8Array
- arrayBufferToUint8Array
- uint8ArrayToArrayOfNumber
- arrayOfNumberToUint8Array
- asciiStringToByteArray
- hexStringToUint8Array
- uint8ArrayToHexString
- encodeBase32
- decodeBase32
- bigEndianCrc32
- debounce
- isNullish
- nonNullish
- notEmptyString
- toNullable
- fromNullable
- fromDefinedNullable
- jsonReplacer
- jsonReviver
- principalToSubAccount
- smallerVersion
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