Golang ITransaction.GetInputs方法代码示例

// Returns an error message about what is wrong with the transaction if it is
// invalid, otherwise you are good to go.
func (fs *FactoidState) Validate(index int, trans interfaces.ITransaction) error {

	var sums = make(map[[32]byte]uint64, 10)  // Look at the sum of an address's inputs
	for _, input := range trans.GetInputs() { //    to a transaction.
		bal, err := factoid.ValidateAmounts(sums[input.GetAddress().Fixed()], input.GetAmount())
		if err != nil {
			return err
		}
		if int64(bal) > fs.State.GetF(true, input.GetAddress().Fixed()) {
			return fmt.Errorf("%s", "Not enough funds in input addresses for the transaction")
		}
		sums[input.GetAddress().Fixed()] = bal
	}

	return nil
}

// Assumes validation has already been done.
func (fs *FactoidState) UpdateTransaction(rt bool, trans interfaces.ITransaction) error {
	for _, input := range trans.GetInputs() {
		adr := input.GetAddress().Fixed()
		oldv := fs.State.GetF(rt, adr)
		fs.State.PutF(rt, adr, oldv-int64(input.GetAmount()))
	}
	for _, output := range trans.GetOutputs() {
		adr := output.GetAddress().Fixed()
		oldv := fs.State.GetF(rt, adr)
		fs.State.PutF(rt, adr, oldv+int64(output.GetAmount()))
	}
	for _, ecOut := range trans.GetECOutputs() {
		ecbal := int64(ecOut.GetAmount()) / int64(fs.State.FactoshisPerEC)
		fs.State.PutE(rt, ecOut.GetAddress().Fixed(), fs.State.GetE(rt, ecOut.GetAddress().Fixed())+ecbal)
	}
	fs.State.NumTransactions++
	return nil
}

// Add the first transaction of a block.  This transaction makes the
// payout to the servers, so it has no inputs.   This transaction must
// be deterministic so that all servers will know and expect its output.
func (b *FBlock) AddCoinbase(trans interfaces.ITransaction) error {
	b.BodyMR = nil
	if len(b.Transactions) != 0 {
		return fmt.Errorf("The coinbase transaction must be the first transaction")
	}
	if len(trans.GetInputs()) != 0 {
		return fmt.Errorf("The coinbase transaction cannot have any inputs")
	}
	if len(trans.GetECOutputs()) != 0 {
		return fmt.Errorf("The coinbase transaction cannot buy Entry Credits")
	}
	if len(trans.GetRCDs()) != 0 {
		return fmt.Errorf("The coinbase transaction cannot have anyRCD blocks")
	}
	if len(trans.GetSignatureBlocks()) != 0 {
		return fmt.Errorf("The coinbase transaction is not signed")
	}

	// TODO Add check here for the proper payouts.

	b.Transactions = append(b.Transactions, trans)
	return nil
}

func (w *SCWallet) SignInputs(trans interfaces.ITransaction) (bool, error) {

	data, err := trans.MarshalBinarySig() // Get the part of the transaction we sign
	if err != nil {
		return false, err
	}

	var numSigs int = 0

	inputs := trans.GetInputs()
	rcds := trans.GetRCDs()
	for i, rcd := range rcds {
		rcd1, ok := rcd.(*RCD_1)
		if ok {
			pub := rcd1.GetPublicKey()
			wex, err := w.db.Get([]byte(constants.W_ADDRESS_PUB_KEY), pub, new(WalletEntry))
			if err != nil {
				return false, err
			}
			we := wex.(*WalletEntry)
			if we != nil {
				var pri [constants.SIGNATURE_LENGTH]byte
				copy(pri[:], we.private[0])
				bsig := ed25519.Sign(&pri, data)
				sig := new(FactoidSignature)
				sig.SetSignature(bsig[:])
				sigblk := new(SignatureBlock)
				sigblk.AddSignature(sig)
				trans.SetSignatureBlock(i, sigblk)
				numSigs += 1
			}
		}
	}

	return numSigs == len(inputs), nil
}