When txHash is null that should throw an error instead of returning null

[mikozet]

Currently

circles-core/src/token.js

Line 665 in 5ee652f

return null;

Please verify after if code in myxogastria is adapted correctly in
https://github.com/CirclesUBI/circles-myxogastria/blob/8f57e2c05eb910b1e4f9893b7a46689e67495a1d/src/store/token/actions.js#L318

It might be that for time being we throw an error in myxogastrai when txHash is null

[louilinn]

We might need to catch some error in the core as well. See this issue for context CirclesUBI/circles-myxogastria#589

[louilinn]

Related Sentry issue: MYXOGASTRIA-PRODUCTION-FVC

When throwing errors in the core we should also make sure to include all relevant information in the TransferError. The transferErrors are logged to myxogastria https://github.com/CirclesUBI/circles-myxogastria/blob/2e5dfe99db31f0225bdef99ce5e1d89a76068dd8/src/views/SendConfirm.js#L143

[louilinn]

Task includes to review transfer errors in the core in general and document. Once defined we need to also adjust the error messages in myxogastria: https://github.com/CirclesUBI/circles-myxogastria/blob/7e249fa31c206b90756803f66a2c0b8a7506c41c/locales/en.json#L342

[louilinn]

Related to PR: CirclesUBI/circles-myxogastria#630
Remove catch in myxo afterwards