ERC20InsufficientGasFunds is returned when there is not enough ETH to pay the erc20 transaction fee.

ErrAccountNotsynced is used when the account sync has not successfully finished.

ErrFeesNotAvailable is returned when there was an error estimating fees.

ErrFeeTooLow is returned when the custom fee the user entered is too low to be able to broadcast the transaction.

ErrInsufficientFunds is returned when there are not enough funds to cover the target amount and fee.

ErrInvalidAddress is used when the recipient address is invalid or does not match the correct network.

ErrInvalidAmount is used when the user entered amount is malformatted or not positive.

ErrNotAvailable is returned if data required is not available yet.

TxValidationError represents errors in the tx proposal input data.