158 lines
3.8 KiB
Go
158 lines
3.8 KiB
Go
package coin
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import (
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"fmt"
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"github.com/tendermint/basecoin"
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"github.com/tendermint/basecoin/types"
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)
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func init() {
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basecoin.TxMapper.RegisterImplementation(SendTx{}, TypeSend, ByteSend)
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}
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// we reserve the 0x20-0x3f range for standard modules
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const (
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ByteSend = 0x20
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TypeSend = NameCoin + "/send"
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)
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//-----------------------------------------------------------------------------
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// TxInput - expected coin movement outputs, used with SendTx
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type TxInput struct {
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Address basecoin.Actor `json:"address"`
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Coins types.Coins `json:"coins"`
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Sequence int `json:"sequence"` // Nonce: Must be 1 greater than the last committed TxInput
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}
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// ValidateBasic - validate transaction input
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func (txIn TxInput) ValidateBasic() error {
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if txIn.Address.App == "" {
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return ErrInvalidAddress()
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}
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// TODO: knowledge of app-specific codings?
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if len(txIn.Address.Address) == 0 {
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return ErrInvalidAddress()
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}
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if !txIn.Coins.IsValid() {
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return ErrInvalidCoins()
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}
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if !txIn.Coins.IsPositive() {
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return ErrInvalidCoins()
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}
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if txIn.Sequence <= 0 {
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return ErrInvalidSequence()
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}
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return nil
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}
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func (txIn TxInput) String() string {
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return fmt.Sprintf("TxInput{%v,%v,%v}", txIn.Address, txIn.Coins, txIn.Sequence)
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}
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// NewTxInput - create a transaction input, used with SendTx
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func NewTxInput(addr basecoin.Actor, coins types.Coins, sequence int) TxInput {
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input := TxInput{
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Address: addr,
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Coins: coins,
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Sequence: sequence,
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}
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return input
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}
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//-----------------------------------------------------------------------------
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// TxOutput - expected coin movement output, used with SendTx
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type TxOutput struct {
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Address basecoin.Actor `json:"address"`
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Coins types.Coins `json:"coins"`
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}
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// ValidateBasic - validate transaction output
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func (txOut TxOutput) ValidateBasic() error {
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if txOut.Address.App == "" {
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return ErrInvalidAddress()
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}
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// TODO: knowledge of app-specific codings?
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if len(txOut.Address.Address) == 0 {
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return ErrInvalidAddress()
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}
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if !txOut.Coins.IsValid() {
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return ErrInvalidCoins()
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}
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if !txOut.Coins.IsPositive() {
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return ErrInvalidCoins()
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}
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return nil
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}
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func (txOut TxOutput) String() string {
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return fmt.Sprintf("TxOutput{%X,%v}", txOut.Address, txOut.Coins)
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}
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// NewTxOutput - create a transaction output, used with SendTx
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func NewTxOutput(addr basecoin.Actor, coins types.Coins) TxOutput {
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output := TxOutput{
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Address: addr,
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Coins: coins,
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}
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return output
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}
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//-----------------------------------------------------------------------------
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// SendTx - high level transaction of the coin module
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// Satisfies: TxInner
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type SendTx struct {
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Inputs []TxInput `json:"inputs"`
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Outputs []TxOutput `json:"outputs"`
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}
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var _ basecoin.Tx = NewSendTx(nil, nil)
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// NewSendTx - new SendTx
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func NewSendTx(in []TxInput, out []TxOutput) basecoin.Tx {
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return SendTx{Inputs: in, Outputs: out}.Wrap()
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}
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// ValidateBasic - validate the send transaction
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func (tx SendTx) ValidateBasic() error {
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// this just makes sure all the inputs and outputs are properly formatted,
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// not that they actually have the money inside
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if len(tx.Inputs) == 0 {
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return ErrNoInputs()
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}
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if len(tx.Outputs) == 0 {
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return ErrNoOutputs()
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}
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// make sure all inputs and outputs are individually valid
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var totalIn, totalOut types.Coins
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for _, in := range tx.Inputs {
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if err := in.ValidateBasic(); err != nil {
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return err
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}
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totalIn = totalIn.Plus(in.Coins)
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}
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for _, out := range tx.Outputs {
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if err := out.ValidateBasic(); err != nil {
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return err
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}
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totalOut = totalOut.Plus(out.Coins)
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}
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// make sure inputs and outputs match
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if !totalIn.IsEqual(totalOut) {
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return ErrInvalidCoins()
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}
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return nil
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}
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func (tx SendTx) String() string {
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return fmt.Sprintf("SendTx{%v->%v}", tx.Inputs, tx.Outputs)
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}
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// Wrap - used to satisfy TxInner
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func (tx SendTx) Wrap() basecoin.Tx {
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return basecoin.Tx{tx}
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}
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