package types import ( "encoding/json" "errors" "io" "github.com/tendermint/tendermint/account" "github.com/tendermint/tendermint/binary" . "github.com/tendermint/tendermint/common" ) var ( ErrTxInvalidAddress = errors.New("Error invalid address") ErrTxDuplicateAddress = errors.New("Error duplicate address") ErrTxInvalidAmount = errors.New("Error invalid amount") ErrTxInsufficientFunds = errors.New("Error insufficient funds") ErrTxInsufficientGasPrice = errors.New("Error insufficient gas price") ErrTxUnknownPubKey = errors.New("Error unknown pubkey") ErrTxInvalidPubKey = errors.New("Error invalid pubkey") ErrTxInvalidSignature = errors.New("Error invalid signature") ErrTxInvalidString = errors.New("Error invalid string") ErrIncorrectOwner = errors.New("Error incorrect owner") ) type ErrTxInvalidSequence struct { Got uint64 Expected uint64 } func (e ErrTxInvalidSequence) Error() string { return Fmt("Error invalid sequence. Got %d, expected %d", e.Got, e.Expected) } /* Tx (Transaction) is an atomic operation on the ledger state. Account Txs: - SendTx Send coins to address - CallTx Send a msg to a contract that runs in the vm - NameTx Store some value under a name in the global namereg Validation Txs: - BondTx New validator posts a bond - UnbondTx Validator leaves - DupeoutTx Validator dupes out (equivocates) */ type Tx interface { WriteSignBytes(chainID string, w io.Writer, n *int64, err *error) } // Types of Tx implementations const ( // Account transactions TxTypeSend = byte(0x01) TxTypeCall = byte(0x02) TxTypeName = byte(0x03) // Validation transactions TxTypeBond = byte(0x11) TxTypeUnbond = byte(0x12) TxTypeRebond = byte(0x13) TxTypeDupeout = byte(0x14) ) // for binary.readReflect var _ = binary.RegisterInterface( struct{ Tx }{}, binary.ConcreteType{&SendTx{}, TxTypeSend}, binary.ConcreteType{&CallTx{}, TxTypeCall}, binary.ConcreteType{&NameTx{}, TxTypeName}, binary.ConcreteType{&BondTx{}, TxTypeBond}, binary.ConcreteType{&UnbondTx{}, TxTypeUnbond}, binary.ConcreteType{&RebondTx{}, TxTypeRebond}, binary.ConcreteType{&DupeoutTx{}, TxTypeDupeout}, ) //----------------------------------------------------------------------------- type TxInput struct { Address []byte `json:"address"` // Hash of the PubKey Amount uint64 `json:"amount"` // Must not exceed account balance Sequence uint `json:"sequence"` // Must be 1 greater than the last committed TxInput Signature account.Signature `json:"signature"` // Depends on the PubKey type and the whole Tx PubKey account.PubKey `json:"pub_key"` // Must not be nil, may be nil } func (txIn *TxInput) ValidateBasic() error { if len(txIn.Address) != 20 { return ErrTxInvalidAddress } if txIn.Amount == 0 { return ErrTxInvalidAmount } return nil } func (txIn *TxInput) WriteSignBytes(w io.Writer, n *int64, err *error) { binary.WriteTo([]byte(Fmt(`{"address":"%X","amount":%v,"sequence":%v}`, txIn.Address, txIn.Amount, txIn.Sequence)), w, n, err) } func (txIn *TxInput) String() string { return Fmt("TxInput{%X,%v,%v,%v,%v}", txIn.Address, txIn.Amount, txIn.Sequence, txIn.Signature, txIn.PubKey) } //----------------------------------------------------------------------------- type TxOutput struct { Address []byte `json:"address"` // Hash of the PubKey Amount uint64 `json:"amount"` // The sum of all outputs must not exceed the inputs. } func (txOut *TxOutput) ValidateBasic() error { if len(txOut.Address) != 20 { return ErrTxInvalidAddress } if txOut.Amount == 0 { return ErrTxInvalidAmount } return nil } func (txOut *TxOutput) WriteSignBytes(w io.Writer, n *int64, err *error) { binary.WriteTo([]byte(Fmt(`{"address":"%X","amount":%v}`, txOut.Address, txOut.Amount)), w, n, err) } func (txOut *TxOutput) String() string { return Fmt("TxOutput{%X,%v}", txOut.Address, txOut.Amount) } //----------------------------------------------------------------------------- type SendTx struct { Inputs []*TxInput `json:"inputs"` Outputs []*TxOutput `json:"outputs"` } func (tx *SendTx) WriteSignBytes(chainID string, w io.Writer, n *int64, err *error) { binary.WriteTo([]byte(Fmt(`{"chain_id":%s`, jsonEscape(chainID))), w, n, err) binary.WriteTo([]byte(Fmt(`,"tx":[%v,{"inputs":[`, TxTypeSend)), w, n, err) for i, in := range tx.Inputs { in.WriteSignBytes(w, n, err) if i != len(tx.Inputs)-1 { binary.WriteTo([]byte(","), w, n, err) } } binary.WriteTo([]byte(`],"outputs":[`), w, n, err) for i, out := range tx.Outputs { out.WriteSignBytes(w, n, err) if i != len(tx.Outputs)-1 { binary.WriteTo([]byte(","), w, n, err) } } binary.WriteTo([]byte(`]}]}`), w, n, err) } func (tx *SendTx) String() string { return Fmt("SendTx{%v -> %v}", tx.Inputs, tx.Outputs) } //----------------------------------------------------------------------------- type CallTx struct { Input *TxInput `json:"input"` Address []byte `json:"address"` GasLimit uint64 `json:"gas_limit"` Fee uint64 `json:"fee"` Data []byte `json:"data"` } func (tx *CallTx) WriteSignBytes(chainID string, w io.Writer, n *int64, err *error) { binary.WriteTo([]byte(Fmt(`{"chain_id":%s`, jsonEscape(chainID))), w, n, err) binary.WriteTo([]byte(Fmt(`,"tx":[%v,{"address":"%X","data":"%X"`, TxTypeCall, tx.Address, tx.Data)), w, n, err) binary.WriteTo([]byte(Fmt(`,"fee":%v,"gas_limit":%v,"input":`, tx.Fee, tx.GasLimit)), w, n, err) tx.Input.WriteSignBytes(w, n, err) binary.WriteTo([]byte(`}]}`), w, n, err) } func (tx *CallTx) String() string { return Fmt("CallTx{%v -> %x: %x}", tx.Input, tx.Address, tx.Data) } //----------------------------------------------------------------------------- type NameTx struct { Input *TxInput `json:"input"` Name string `json:"name"` Data string `json:"data"` Fee uint64 `json:"fee"` } func (tx *NameTx) WriteSignBytes(chainID string, w io.Writer, n *int64, err *error) { binary.WriteTo([]byte(Fmt(`{"chain_id":%s`, jsonEscape(chainID))), w, n, err) binary.WriteTo([]byte(Fmt(`,"tx":[%v,{"data":%s,"fee":%v`, TxTypeName, jsonEscape(tx.Data), tx.Fee)), w, n, err) binary.WriteTo([]byte(`,"input":`), w, n, err) tx.Input.WriteSignBytes(w, n, err) binary.WriteTo([]byte(Fmt(`,"name":%s`, jsonEscape(tx.Name))), w, n, err) binary.WriteTo([]byte(`}]}`), w, n, err) } func (tx *NameTx) ValidateStrings() error { if len(tx.Name) == 0 { return errors.New("Name must not be empty") } if len(tx.Name) > MaxNameLength { return errors.New(Fmt("Name is too long. Max %d bytes", MaxNameLength)) } if len(tx.Data) > MaxDataLength { return errors.New(Fmt("Data is too long. Max %d bytes", MaxDataLength)) } if !validateNameRegEntryName(tx.Name) { return errors.New(Fmt("Invalid characters found in NameTx.Name (%s). Only alphanumeric, underscores, and forward slashes allowed", tx.Name)) } if !validateNameRegEntryData(tx.Data) { return errors.New(Fmt("Invalid characters found in NameTx.Data (%s). Only the kind of things found in a JSON file are allowed", tx.Data)) } return nil } func (tx *NameTx) BaseEntryCost() uint64 { return BaseEntryCost(tx.Name, tx.Data) } func (tx *NameTx) String() string { return Fmt("NameTx{%v -> %s: %s}", tx.Input, tx.Name, tx.Data) } //----------------------------------------------------------------------------- type BondTx struct { PubKey account.PubKeyEd25519 `json:"pub_key"` Signature account.SignatureEd25519 `json:"signature"` Inputs []*TxInput `json:"inputs"` UnbondTo []*TxOutput `json:"unbond_to"` } func (tx *BondTx) WriteSignBytes(chainID string, w io.Writer, n *int64, err *error) { binary.WriteTo([]byte(Fmt(`{"chain_id":%s`, jsonEscape(chainID))), w, n, err) binary.WriteTo([]byte(Fmt(`,"tx":[%v,{"inputs":[`, TxTypeBond)), w, n, err) for i, in := range tx.Inputs { in.WriteSignBytes(w, n, err) if i != len(tx.Inputs)-1 { binary.WriteTo([]byte(","), w, n, err) } } binary.WriteTo([]byte(Fmt(`],"pub_key":`)), w, n, err) binary.WriteTo(binary.JSONBytes(tx.PubKey), w, n, err) binary.WriteTo([]byte(`,"unbond_to":[`), w, n, err) for i, out := range tx.UnbondTo { out.WriteSignBytes(w, n, err) if i != len(tx.UnbondTo)-1 { binary.WriteTo([]byte(","), w, n, err) } } binary.WriteTo([]byte(`]}]}`), w, n, err) } func (tx *BondTx) String() string { return Fmt("BondTx{%v: %v -> %v}", tx.PubKey, tx.Inputs, tx.UnbondTo) } //----------------------------------------------------------------------------- type UnbondTx struct { Address []byte `json:"address"` Height uint `json:"height"` Signature account.SignatureEd25519 `json:"signature"` } func (tx *UnbondTx) WriteSignBytes(chainID string, w io.Writer, n *int64, err *error) { binary.WriteTo([]byte(Fmt(`{"chain_id":%s`, jsonEscape(chainID))), w, n, err) binary.WriteTo([]byte(Fmt(`,"tx":[%v,{"address":"%X","height":%v}]}`, TxTypeUnbond, tx.Address, tx.Height)), w, n, err) } func (tx *UnbondTx) String() string { return Fmt("UnbondTx{%X,%v,%v}", tx.Address, tx.Height, tx.Signature) } //----------------------------------------------------------------------------- type RebondTx struct { Address []byte `json:"address"` Height uint `json:"height"` Signature account.SignatureEd25519 `json:"signature"` } func (tx *RebondTx) WriteSignBytes(chainID string, w io.Writer, n *int64, err *error) { binary.WriteTo([]byte(Fmt(`{"chain_id":%s`, jsonEscape(chainID))), w, n, err) binary.WriteTo([]byte(Fmt(`,"tx":[%v,{"address":"%X","height":%v}]}`, TxTypeRebond, tx.Address, tx.Height)), w, n, err) } func (tx *RebondTx) String() string { return Fmt("RebondTx{%X,%v,%v}", tx.Address, tx.Height, tx.Signature) } //----------------------------------------------------------------------------- type DupeoutTx struct { Address []byte `json:"address"` VoteA Vote `json:"vote_a"` VoteB Vote `json:"vote_b"` } func (tx *DupeoutTx) WriteSignBytes(chainID string, w io.Writer, n *int64, err *error) { panic("DupeoutTx has no sign bytes") } func (tx *DupeoutTx) String() string { return Fmt("DupeoutTx{%X,%v,%v}", tx.Address, tx.VoteA, tx.VoteB) } //----------------------------------------------------------------------------- func TxId(chainID string, tx Tx) []byte { signBytes := account.SignBytes(chainID, tx) return binary.BinaryRipemd160(signBytes) } //-------------------------------------------------------------------------------- // Contract: This function is deterministic and completely reversible. func jsonEscape(str string) string { escapedBytes, err := json.Marshal(str) if err != nil { panic(Fmt("Error json-escaping a string", str)) } return string(escapedBytes) }