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cmd/pushtx: add tx cost display to catch insufficient funds before broadcast

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Co-authored-by: drQedwards <213266729+drQedwards@users.noreply.github.com>
This commit is contained in:
copilot-swe-agent[bot] 2026-03-12 16:24:50 +00:00
parent cc2957508f
commit 84f37d3915
2 changed files with 22 additions and 0 deletions
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8
cmd/pushtx/main.go
View file

@ -156,9 +156,17 @@ func printTxSummary(tx *types.Transaction) {
fmt.Println(" Value: ", formatWei(tx.Value()))
fmt.Println(" Gas limit:", tx.Gas())
fmt.Println(" Gas price:", formatGwei(tx.GasPrice()))
fmt.Println(" Tx cost: ", formatWei(txCost(tx)))
fmt.Println(" Chain ID: ", tx.ChainId())
}
// txCost returns value + gas * gasPrice, i.e. the total ETH the sender
// must hold for the transaction to be accepted by the network.
func txCost(tx *types.Transaction) *big.Int {
gasCost := new(big.Int).Mul(new(big.Int).SetUint64(tx.Gas()), tx.GasPrice())
return new(big.Int).Add(tx.Value(), gasCost)
}
// formatWei converts a wei amount to a human-readable string showing
// both the wei value and the ETH equivalent.
func formatWei(wei *big.Int) string {

14
cmd/pushtx/main_test.go
View file

@ -272,6 +272,20 @@ func TestFormatGwei(t *testing.T) {
}
}
func TestTxCost(t *testing.T) {
tx := types.NewTx(&types.LegacyTx{
GasPrice: big.NewInt(1_000_000_000), // 1 Gwei
Gas: 21055,
Value: new(big.Int).Mul(big.NewInt(10), big.NewInt(1e18)), // 10 ETH
})
got := txCost(tx)
// Expected: 10 ETH + 21055 * 1 Gwei = 10000000000000000000 + 21055000000000 = 10000021055000000000
want, _ := new(big.Int).SetString("10000021055000000000", 10)
if got.Cmp(want) != 0 {
t.Errorf("txCost = %s, want %s", got, want)
}
}
func TestRunEqualsSyntax(t *testing.T) {
srv := fakeRPC(t, false)
defer srv.Close()