Updated default chainID to empty string instead of `-1`

[razvantomegea]

Issue

Transactions signing fail on dapp refresh.

Reproduce

• Go to Devnet Wallet (on firefox);
• Login with xPortal or Extension;
• Refresh;
• Send a transaction.

Actual Result: Transaction cancelled error appears Expected Result: Transactions are signed and processing

Root cause

chainID is set to -1 by default. This causes the chainID check to pass as truthy in waitForChainID function and return an incorrect value.

Furthermore, the returned chainID will be different than the chainID of the signed transactions, so, those transactions will fail.

Fix

Make the chainID '' by default.

Additional changes

Contains breaking changes

[x] No

[] Yes

Updated CHANGELOG

[x] Yes

Testing

[x] User testing [] Unit tests