Mismatch between value actually sent and intended to be sent when utxo does not have sufficient fund

[Eggham]

The setting is that a Hydra head has been set up between Bob and Carol. Suppose Bob wants to send Carol 123456 Lovelace but the UTxO that Bob chooses to spend has only 123455 Lovelace (1 Lovelace less). In this setting, the transaction still succeeds despite insufficient fund in the chosen UTxO. But the actual amount Carol receives and Bob sends becomes 12345 Lovelace, instead of the intended 123456 Lovelace.

[ch1bo]

Thanks for raising this, I assumed this is using the hydra-tui client and could reproduce the behavior there ... looking into this now.

[ch1bo]

It seems like the TUI is parsing the entered text wrong, e.g. when presented with 450000000 lovelace, the user changes the last digit to 1 -> 450000001, the hydra-tui at version 0.3.0 parses a 45000000!

Note that the hydra-tui is a demonstrative client and is not as well-tested as the hydra-node itself.