MetaMask - RPC Error: eth_sign requires 32 byte message hash

Moralis General
#1

Hello, I got problem with your .Net core demo, it comes at the signing message step. I am using your sample client and server code at the tutorial: https://docs.moralis.io/web3-data-api/quickstart-dot-net-csharp

MetaMask - RPC Error: eth_sign requires 32 byte message hash {code: -32602, message: 'eth_sign requires 32 byte message hash'}

Please help, thank you

#2

Hello,
Did you get a message to sign? at what step you got that error?

What line generates that error?

#3

Hi,

The server successfully response the sign message. At this line of code in js file, I got the error:
// 6. Request that the user sign the message
const signature = await web3.eth.sign(msg.message, selectedAccount);

#4

can you add a console.log(msg.message) to see if it has the expected data?

#5 
example.com wants you to sign in with your Ethereum account:
0x51A4F80c8aE58DFCE0B4AC0761592dDFCF99f73f

Please confirm

URI: https://example.com
Version: 1
Chain ID: 56
Nonce: MABYWa9ccRE2K8a0j
Issued At: 2023-01-12T20:09:45.798Z
Expiration Time: 2023-01-12T21:09:44.4005055Z
Not Before: 2023-01-12T20:09:44.4005526Z
Resources:
- https://www.1155project.com

I think this is the expected data, is this related to eth_sign?

#6

And I am using BNB chain, I think it works with chainId = 56

#7

where from you have this code? it should be personal sign used instead of eth.sign

#8

Hi, I downloaded it from the tutorial. What should it be?

#9
#10

It works now! Please update the demo source, this helps other save their time.

Thanks alot for your help.

#11

What was the link to the tutorial?

#12

it’s here, in section 5

#13

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