!154 was merged without tests. We should write tests for tx: - [ ] ensure an `amountUD` < 1e-6 is not allowed bi Click (commit bda2b8cd69c680c5dcd2c2a23753ec8c6ff9b686) - [ ] ensure `--allSources` fails if the issuers pubkey is empty (commit 43fec2fa363b515242e62e0eb77616d60794d650)