LBRYCommunity/lbcwallet
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Include amounts with insufficient funds errors.

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Closes #102.
This commit is contained in:
Josh Rickmar 2014-06-20 11:58:21 -05:00
parent 938dfa1517
commit 1163b3065e
1 changed files with 23 additions and 7 deletions
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30
createtx.go
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@ -33,9 +33,25 @@ import (
"github.com/conformal/btcwire"
)
// ErrInsufficientFunds represents an error where there are not enough
// InsufficientFundsError represents an error where there are not enough
// funds from unspent tx outputs for a wallet to create a transaction.
var ErrInsufficientFunds = errors.New("insufficient funds")
// This may be caused by not enough inputs for all of the desired total
// transaction output amount, or due to
type InsufficientFundsError struct {
in, out, fee btcutil.Amount
}
// Error satisifies the builtin error interface.
func (e InsufficientFundsError) Error() string {
total := e.out + e.fee
if e.fee == 0 {
return fmt.Sprintf("insufficient funds: transaction requires "+
"%s input but only %v spendable", total, e.in)
}
return fmt.Sprintf("insufficient funds: transaction requires %s input "+
"(%v output + %v fee) but only %v spendable", total, e.out,
e.fee, e.in)
}
// ErrNonPositiveAmount represents an error where a bitcoin amount is
// not positive (either negative, or zero).
@ -79,7 +95,7 @@ func (u ByAmount) Swap(i, j int) { u[i], u[j] = u[j], u[i] }
// combination of all selected previous outputs. err will equal
// ErrInsufficientFunds if there are not enough unspent outputs to spend amt
// amt.
func selectInputs(eligible []txstore.Credit, amt btcutil.Amount,
func selectInputs(eligible []txstore.Credit, amt, fee btcutil.Amount,
minconf int) (selected []txstore.Credit, out btcutil.Amount, err error) {
// Iterate throguh eligible transactions, appending to outputs and
@ -89,12 +105,12 @@ func selectInputs(eligible []txstore.Credit, amt btcutil.Amount,
for _, e := range eligible {
selected = append(selected, e)
out += e.Amount()
if out >= amt {
if out >= amt+fee {
return selected, out, nil
}
}
if out < amt {
return nil, 0, ErrInsufficientFunds
if out < amt+fee {
return nil, 0, InsufficientFundsError{out, amt, fee}
}
return selected, out, nil
@ -202,7 +218,7 @@ func (a *Account) txToPairs(pairs map[string]btcutil.Amount,
// Select eligible outputs to be used in transaction based on the amount
// neededing to sent, and the current fee estimation.
inputs, btcin, err := selectInputs(eligible, amt+fee, minconf)
inputs, btcin, err := selectInputs(eligible, amt, fee, minconf)
if err != nil {
return nil, err
}