[Bug]: Secret Ownership with multiple public keys not working using transactionBuilder.html

[roychowdhuryrohit-dev]

What happened?

Assuming archethic-foundation/archethic-node#177 is fixed, using the example/transactionBuilder.html when I try to pass multiple public keys in ownership, I get the following error.

GraphQL request payload

On logging the variable authorizedKeys in previousSignaturePayload()

libjs/lib/transaction_builder.js

Lines 329 to 334 in 88048f6

	let authorizedKeysBuffer = [Uint8Array.from([authorizedKeys.length])]
	authorizedKeys.forEach(({ publicKey, encryptedSecretKey }) => {
	authorizedKeysBuffer.push(publicKey)
	authorizedKeysBuffer.push(encryptedSecretKey)
	})

Console output

What is expected ?

Should get 200 OK response and transaction should appear in ArchEthic explorer as well in GraphQL workspace.

This issue doesn't occur when single public key is sent.

[redDwarf03]

Same things in dart SDK
this issue becomes blocking