smart

package
v0.0.0-...-8e17a21 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Jan 7, 2020 License: GPL-2.0 Imports: 42 Imported by: 33

Documentation

Index

Constants

View Source 
const (
	// MaxPrice is a maximal value that price function can return
	MaxPrice = 100000000000000000

	CallDelayedContract = "@1CallDelayedContract"
	NewUserContract     = "@1NewUser"
	NewBadBlockContract = "@1NewBadBlock"
)
View Source 
const (
	SysName = `@system`
)

Variables

View Source 
var BOM = []byte{0xEF, 0xBB, 0xBF}
View Source 
var (
	ErrNotImplementedOnOBS = errors.New("Contract not implemented on OBS")
)

Functions

func ActivateContract 

func ActivateContract(tblid, state int64, active bool)

ActivateContract sets Active status of the contract in smartVM

func AddressToID 

func AddressToID(input string) (addr int64)

AddressToID converts the string representation of the wallet number to a numeric

func AllowChangeCondition 

func AllowChangeCondition(sc *SmartContract, tblname string) error

AllowChangeCondition check acces to change condition throught supper contract

func AppParam 

func AppParam(sc *SmartContract, app int64, name string, ecosystem int64) (string, error)

AppParam returns the value of the specified app parameter for the ecosystem

func Append 

func Append(slice []interface{}, val interface{}) []interface{}

Append syn for golang 'append' function

func BlockTime 

func BlockTime(sc *SmartContract) string

func BndWallet 

func BndWallet(sc *SmartContract, tblid int64, state int64) error

BndWallet sets wallet_id to current wallet and updates value in vm

func BytesToString 

func BytesToString(src []byte) string

BytesToString converts bytes to string

func CheckCondition 

func CheckCondition(sc *SmartContract, condition string) (bool, error)

CheckCondition evaluates the condition

func CheckSignature 

func CheckSignature(i *map[string]interface{}, name string) error

CheckSignature checks the additional signatures for the contract

func ColumnCondition 

func ColumnCondition(sc *SmartContract, tableName, name, coltype, permissions string) error

ColumnCondition is contract func

func Compile 

func Compile(src string, owner *script.OwnerInfo) error

Compile compiles contract source code in smartVM

func CompileBlock 

func CompileBlock(src string, owner *script.OwnerInfo) (*script.Block, error)

CompileBlock calls CompileBlock for smartVM

func CompileContract 

func CompileContract(sc *SmartContract, code string, state, id, token int64) (interface{}, error)

CompileContract is compiling contract

func CompileEval 

func CompileEval(src string, prefix uint32) error

CompileEval calls CompileEval for smartVM

func ContractAccess 

func ContractAccess(sc *SmartContract, names ...interface{}) bool

ContractAccess checks whether the name of the executable contract matches one of the names listed in the parameters.

func ContractConditions 

func ContractConditions(sc *SmartContract, names ...interface{}) (bool, error)

ContractConditions calls the 'conditions' function for each of the contracts specified in the parameters

func CreateColumn 

func CreateColumn(sc *SmartContract, tableName, name, colType, permissions string) (err error)

CreateColumn is creating column

func CreateContract 

func CreateContract(sc *SmartContract, name, value, conditions string, tokenEcosystem, appID int64) (int64, error)

func CreateEcosystem 

func CreateEcosystem(sc *SmartContract, wallet int64, name string) (int64, error)

CreateEcosystem creates a new ecosystem

func CreateLanguage 

func CreateLanguage(sc *SmartContract, name, trans string) (id int64, err error)

NewLang creates new language

func CreateOBS 

func CreateOBS(sc *SmartContract, name, dbUser, dbPassword string, port int64) error

CreateOBS allow create new OBS throught obsmanager

func CreateTable 

func CreateTable(sc *SmartContract, name, columns, permissions string, applicationID int64) (err error)

CreateTable is creating smart contract table

func DBCollectMetrics 

func DBCollectMetrics(sc *SmartContract) []interface{}

DBCollectMetrics returns actual values of all metrics This function used to further store these values

func DBInsert 

func DBInsert(sc *SmartContract, tblname string, values *types.Map) (qcost int64, ret int64, err error)

DBInsert inserts a record into the specified database table

func DBSelect 

func DBSelect(sc *SmartContract, tblname string, inColumns interface{}, id int64, inOrder interface{},
	offset, limit int64, inWhere *types.Map) (int64, []interface{}, error)

DBSelect returns an array of values of the specified columns when there is selection of data 'offset', 'limit', 'where'

func DBSelectMetrics 

func DBSelectMetrics(sc *SmartContract, metric, timeInterval, aggregateFunc string) ([]interface{}, error)

DBSelectMetrics returns list of metrics by name and time interval

func DBUpdate 

func DBUpdate(sc *SmartContract, tblname string, id int64, values *types.Map) (qcost int64, err error)

DBUpdate updates the item with the specified id in the table

func DBUpdateExt 

func DBUpdateExt(sc *SmartContract, tblname string, where *types.Map,
	values *types.Map) (qcost int64, err error)

DBUpdateExt updates the record in the specified table. You can specify 'where' query in params and then the values for this query

func Date 

func Date(timeFormat string, timestamp int64) string

Date formats timestamp to specified date format

func DateTime 

func DateTime(unix int64) string

func DateTimeLocation 

func DateTimeLocation(unix int64, locationName string) (string, error)

func DecodeBase64 

func DecodeBase64(input string) (out string, err error)

DecodeBase64 decodes base64 string

func DelColumn 

func DelColumn(sc *SmartContract, tableName, name string) (err error)

func DelTable 

func DelTable(sc *SmartContract, tableName string) (err error)

func DeleteOBS 

func DeleteOBS(sc *SmartContract, name string) error

DeleteOBS delete obs

func EcosysParam 

func EcosysParam(sc *SmartContract, name string) string

EcosysParam returns the value of the specified parameter for the ecosystem

func EditEcosysName 

func EditEcosysName(sc *SmartContract, sysID int64, newName string) error

EditEcosysName set newName for ecosystem

func EditLanguage 

func EditLanguage(sc *SmartContract, id int64, name, trans string) error

EditLanguage edits language

func EmbedFuncs 

func EmbedFuncs(vm *script.VM, vt script.VMType)

EmbedFuncs is extending vm with embedded functions

func EncodeBase64 

func EncodeBase64(input string) (out string)

EncodeBase64 encodes string in base64

func Eval 

func Eval(sc *SmartContract, condition string) error

Eval evaluates the condition

func EvalCondition 

func EvalCondition(sc *SmartContract, table, name, condfield string) error

EvalCondition gets the condition and check it

func EvalIf 

func EvalIf(src string, state uint32, extend *map[string]interface{}) (bool, error)

EvalIf calls EvalIf for smartVM

func Extend 

func Extend(ext *script.ExtendData)

Extend set extended variable and functions in smartVM

func ExtendCost 

func ExtendCost(ext func(string) int64)

ExtendCost sets the cost of calling extended obj in smartVM

func ExternOff 

func ExternOff()

ExternOff switches off the extern compiling mode in smartVM

func FillTxData 

func FillTxData(fieldInfos []*script.FieldInfo, params map[string]interface{}) (map[string]interface{}, error)

func Float 

func Float(v interface{}) (ret float64)

Float converts the value to float64

func Floor 

func Floor(x interface{}) (int64, error)

Floor returns the greatest integer value less than or equal to x

func FlushBlock 

func FlushBlock(root *script.Block)

FlushBlock calls FlushBlock for smartVM

func FlushContract 

func FlushContract(sc *SmartContract, iroot interface{}, id int64) error

FlushContract is flushing contract

func FormatMoney 

func FormatMoney(sc *SmartContract, exp string, digit int64) (string, error)

func FuncCallsDB 

func FuncCallsDB(funcCallsDB map[string]struct{})

func GetBlock 

func GetBlock(blockID int64) (*types.Map, error)

func GetColumnType 

func GetColumnType(sc *SmartContract, tableName, columnName string) (string, error)

GetColumnType returns the type of the column

func GetColumns 

func GetColumns(inColumns interface{}) ([]string, error)

func GetContractById 

func GetContractById(sc *SmartContract, id int64) string

GetContractById returns the name of the contract with this id

func GetContractByName 

func GetContractByName(sc *SmartContract, name string) int64

GetContractByName returns id of the contract with this name

func GetDataFromXLSX 

func GetDataFromXLSX(sc *SmartContract, binaryID, startLine, linesCount, sheetNum int64) (data []interface{}, err error)

GetDataFromXLSX returns json by parameters range

func GetHistory 

func GetHistory(sc *SmartContract, tableName string, id int64) ([]interface{}, error)

func GetHistoryRaw 

func GetHistoryRaw(transaction *model.DbTransaction, ecosystem int64, tableName string,
	id, idRollback int64) ([]interface{}, error)

func GetHistoryRow 

func GetHistoryRow(sc *SmartContract, tableName string, id, idRollback int64) (*types.Map,
	error)

func GetMapKeys 

func GetMapKeys(in *types.Map) []interface{}

GetMapKeys returns the array of keys of the map

func GetOBSList 

func GetOBSList(sc *SmartContract) map[string]string

GetOBSList returns list OBS process with statuses

func GetOrder 

func GetOrder(tblname string, inOrder interface{}) (string, error)

func GetRowsCountXLSX 

func GetRowsCountXLSX(sc *SmartContract, binaryID, sheetNum int64) (int64, error)

GetRowsCountXLSX returns count of rows from excel file

func GetTableName 

func GetTableName(sc *SmartContract, tblname string) string

func GetTestValue 

func GetTestValue(name string) string

GetTestValue returns the test value of the specified key

func GetType 

func GetType(val interface{}) string

GetType returns the name of the type of the value

func GetUsedContracts 

func GetUsedContracts(name string, state uint32, full bool) []string

GetUsedContracts returns the list of contracts which are called from the specified contract

func GetVM 

func GetVM() *script.VM

GetVM is returning smart vm

func HMac 

func HMac(key, data string, raw_output bool) (ret string, err error)

HMac returns HMAC hash as raw or hex string

func HTTPPostJSON 

func HTTPPostJSON(requrl string, head *types.Map, json_str string) (string, error)

HTTPPostJSON sends post http request with json

func HTTPRequest 

func HTTPRequest(requrl, method string, head *types.Map, params *types.Map) (string, error)

HTTPRequest sends http request

func Hash 

func Hash(data interface{}) (string, error)

Hash returns sha256 hash sum of data

func HexToBytes 

func HexToBytes(hexdata string) ([]byte, error)

HexToBytes converts the hexadecimal representation to []byte

func IDToAddress 

func IDToAddress(id int64) (out string)

IDToAddress converts the identifier of account to a string of the form XXXX -...- XXXX

func InitVM 

func InitVM()

func Int 

func Int(v interface{}) (int64, error)

Int converts the value to a number

func IsObject 

func IsObject(sc *SmartContract, name string, state int64) bool

IsObject returns true if there is the specified contract

func JSONDecode 

func JSONDecode(input string) (ret interface{}, err error)

JSONDecode converts json string to object

func JSONEncode 

func JSONEncode(input interface{}) (string, error)

JSONEncode converts object to json string

func JSONEncodeIndent 

func JSONEncodeIndent(input interface{}, indent string) (string, error)

JSONEncodeIdent converts object to json string

func Join 

func Join(input []interface{}, sep string) string

Join is joining input with separator

func LangRes 

func LangRes(sc *SmartContract, idRes, lang string) string

LangRes returns the language resource

func Len 

func Len(in []interface{}) int64

Len returns the length of the slice

func LoadContract 

func LoadContract(transaction *model.DbTransaction, ecosystem int64) (err error)

LoadContract reads and compiles contract of new state

func LoadContracts 

func LoadContracts() error

LoadContracts reads and compiles contracts from smart_contracts tables

func LoadSysFuncs 

func LoadSysFuncs(vm *script.VM, state int) error

func Log 

func Log(x interface{}) (float64, error)

Log returns the natural logarithm of x

func Log10 

func Log10(x interface{}) (float64, error)

Log10 returns the decimal logarithm of x

func Money 

func Money(v interface{}) (decimal.Decimal, error)

Money converts the value into a numeric type for money

func PermColumn 

func PermColumn(sc *SmartContract, tableName, name, permissions string) error

PermColumn is contract func

func PermTable 

func PermTable(sc *SmartContract, name, permissions string) error

PermTable is changing permission of table

func Pow 

func Pow(x, y interface{}) (float64, error)

Pow returns x**y, the base-x exponential of y

func PrefixName 

func PrefixName(table string) (prefix, name string)

func PrepareColumns 

func PrepareColumns(columns []string) string

PrepareColumns replaces jsonb fields -> in the list of columns for db selecting For example, name,doc->title => name,doc::jsonb->>'title' as "doc.title"

func PubToHex 

func PubToHex(in interface{}) (ret string)

func PubToID 

func PubToID(hexkey string) int64

PubToID returns a numeric identifier for the public key specified in the hexadecimal form.

func Random 

func Random(sc *SmartContract, min int64, max int64) (int64, error)

Random returns a random value between min and max

func Replace 

func Replace(s, old, new string) string

Replace replaces old substrings to new substrings

func RoleAccess 

func RoleAccess(sc *SmartContract, ids ...interface{}) (bool, error)

RoleAccess checks whether the name of the role matches one of the names listed in the parameters.

func Round 

func Round(x interface{}) (int64, error)

Round returns the nearest integer, rounding half away from zero

func RowConditions 

func RowConditions(sc *SmartContract, tblname string, id int64, conditionOnly bool) error

RowConditions checks conditions for table row by id

func Run 

func Run(block *script.Block, params []interface{}, extend *map[string]interface{}) (ret []interface{}, err error)

Run executes Block in smartVM

func SendExternalTransaction 

func SendExternalTransaction(sc *SmartContract, uid, url, externalContract string,
	params *types.Map, resultContract string) (err error)

func SetContractWallet 

func SetContractWallet(sc *SmartContract, tblid, state int64, wallet int64) error

SetContractWallet changes WalletID of the contract in smartVM

func Sha256 

func Sha256(text string) (string, error)

Sha256 returns SHA256 hash value

func Size 

func Size(s string) int64

Size returns the length of the string

func SortedKeys 

func SortedKeys(m *types.Map) []interface{}

SortedKeys returns the sorted array of keys of the map

func Split 

func Split(input, sep string) []interface{}

Split splits the input string to array

func Sqrt 

func Sqrt(x interface{}) (float64, error)

Sqrt returns the square root of x

func StackOverflow 

func StackOverflow(sc *SmartContract)

func StartOBS 

func StartOBS(sc *SmartContract, name string) error

StartOBS run OBS process

func StopOBSProcess 

func StopOBSProcess(sc *SmartContract, name string) error

StopOBSProcess stops OBS process

func Str 

func Str(v interface{}) (ret string)

Str converts the value to a string

func StringToBytes 

func StringToBytes(src string) []byte

StringToBytes converts string to bytes

func Substr 

func Substr(s string, off int64, slen int64) string

Substr returns the substring of the string

func SysFlushContract 

func SysFlushContract(iroot interface{}, id int64, active bool) error

SysFlushContract is flushing contract

func SysFuel 

func SysFuel(state int64) string

SysFuel returns the fuel rate

func SysParamInt 

func SysParamInt(name string) int64

SysParamInt returns the value of the system parameter

func SysParamString 

func SysParamString(name string) string

SysParamString returns the value of the system parameter

func SysRollback 

func SysRollback(sc *SmartContract, data SysRollData) error

func SysRollbackActivate 

func SysRollbackActivate(sysData SysRollData) error

SysRollbackActivate sets Deactive status of the contract in smartVM

func SysRollbackColumn 

func SysRollbackColumn(DbTransaction *model.DbTransaction, sysData SysRollData) error

SysRollbackColumn is rolling back column

func SysRollbackContract 

func SysRollbackContract(name string, EcosystemID int64) error

SysRollbackContract performs rollback for the contract

func SysRollbackDeactivate 

func SysRollbackDeactivate(sysData SysRollData) error

SysRollbackDeactivate sets Active status of the contract in smartVM

func SysRollbackDeleteColumn 

func SysRollbackDeleteColumn(DbTransaction *model.DbTransaction, sysData SysRollData) error

SysRollbackDeleteColumn is rolling back delete column

func SysRollbackDeleteTable 

func SysRollbackDeleteTable(DbTransaction *model.DbTransaction, sysData SysRollData) error

SysRollbackDeleteTable is rolling back delete table

func SysRollbackEcosystem 

func SysRollbackEcosystem(DbTransaction *model.DbTransaction, sysData SysRollData) error

SysRollbackEcosystem is rolling back ecosystem

func SysRollbackEditContract 

func SysRollbackEditContract(transaction *model.DbTransaction, sysData SysRollData,
	EcosystemID string) error

SysRollbackEditContract rollbacks the contract

func SysRollbackNewContract 

func SysRollbackNewContract(sysData SysRollData, EcosystemID string) error

func SysRollbackTable 

func SysRollbackTable(DbTransaction *model.DbTransaction, sysData SysRollData) error

SysRollbackTable is rolling back table

func SysSetContractWallet 

func SysSetContractWallet(tblid, state int64, wallet int64) error

SysSetContractWallet changes WalletID of the contract in smartVM

func TableConditions 

func TableConditions(sc *SmartContract, name, columns, permissions string) (err error)

TableConditions is contract func

func Throw 

func Throw(code, errText string) error

func TransactionInfo 

func TransactionInfo(txHash string) (string, error)

func UnbndWallet 

func UnbndWallet(sc *SmartContract, tblid int64, state int64) error

UnbndWallet sets Active status of the contract in smartVM

func UnixDateTime 

func UnixDateTime(value string) int64

func UnixDateTimeLocation 

func UnixDateTimeLocation(value, locationName string) (int64, error)

func UpdateContract 

func UpdateContract(sc *SmartContract, id int64, value, conditions string, recipient int64, tokenID string) error

func UpdateCron 

func UpdateCron(sc *SmartContract, id int64) error

func UpdateNodesBan 

func UpdateNodesBan(smartContract *SmartContract, timestamp int64) error

func UpdateNotifications 

func UpdateNotifications(sc *SmartContract, ecosystemID int64, accounts ...interface{})

func UpdateRolesNotifications 

func UpdateRolesNotifications(sc *SmartContract, ecosystemID int64, roles ...interface{})

func UpdateSysParam 

func UpdateSysParam(sc *SmartContract, name, value, conditions string) (int64, error)

UpdateSysParam updates the system parameter

func VMCompileBlock 

func VMCompileBlock(vm *script.VM, src string, owner *script.OwnerInfo) (*script.Block, error)

VMCompileBlock is compiling block

func VMCompileEval 

func VMCompileEval(vm *script.VM, src string, prefix uint32) error

func VMEvalIf 

func VMEvalIf(vm *script.VM, src string, state uint32, extend *map[string]interface{}) (bool, error)

func VMFlushBlock 

func VMFlushBlock(vm *script.VM, root *script.Block)

func VMObjectExists 

func VMObjectExists(vm *script.VM, name string, state uint32) bool

func VMRun 

func VMRun(vm *script.VM, block *script.Block, params []interface{}, extend *map[string]interface{}) (ret []interface{}, err error)

func ValidateCondition 

func ValidateCondition(sc *SmartContract, condition string, state int64) error

ValidateCondition checks if the condition can be compiled

func ValidateCron 

func ValidateCron(cronSpec string) (err error)

func ValidateEditContractNewValue 

func ValidateEditContractNewValue(sc *SmartContract, newValue, oldValue string) error

Types

type Contract 

type Contract struct {
	Name          string
	Called        uint32
	FreeRequest   bool
	TxGovAccount  int64   // state wallet
	EGSRate       float64 // money/EGS rate
	TableAccounts string
	StackCont     []interface{} // Stack of called contracts
	Extend        *map[string]interface{}
	Block         *script.Block
}

Contract contains the information about the contract.

func GetContract 

func GetContract(name string, state uint32) *Contract

GetContract returns true if the contract exists in smartVM

func GetContractByID 

func GetContractByID(id int32) *Contract

GetContractByID returns true if the contract exists

func VMGetContract 

func VMGetContract(vm *script.VM, name string, state uint32) *Contract

func VMGetContractByID 

func VMGetContractByID(vm *script.VM, id int32) *Contract

func (*Contract) GetFunc 

func (contract *Contract) GetFunc(name string) *script.Block

GetFunc returns the block of the specified function in the contract

func (*Contract) Info 

func (c *Contract) Info() *script.ContractInfo

type FlushInfo 

type FlushInfo struct {
	ID   uint32        // id
	Prev *script.Block // previous item, nil if the new item has been appended
	Info *script.ObjInfo
	Name string // the name
}

type NotifyInfo 

type NotifyInfo struct {
	Roles       bool // if true then UpdateRolesNotifications, otherwise UpdateNotifications
	EcosystemID int64
	List        []string
}

NotifyInfo is used for sending delayed notifications

type SignRes 

type SignRes struct {
	Param string `json:"name"`
	Text  string `json:"text"`
}

SignRes contains the data of the signature

type SmartContract 

type SmartContract struct {
	OBS           bool
	Rollback      bool
	FullAccess    bool
	SysUpdate     bool
	VM            *script.VM
	TxSmart       tx.SmartContract
	TxData        map[string]interface{}
	TxContract    *Contract
	TxFuel        int64           // The fuel of executing contract
	TxCost        int64           // Maximum cost of executing contract
	TxUsedCost    decimal.Decimal // Used cost of CPU resources
	BlockData     *utils.BlockData
	Loop          map[string]bool
	TxHash        []byte
	TxSignature   []byte
	TxSize        int64
	PublicKeys    [][]byte
	DbTransaction *model.DbTransaction
	Rand          *rand.Rand
	FlushRollback []FlushInfo
	Notifications types.Notifications
	GenBlock      bool
	TimeLimit     int64
	Key           *model.Key
}

SmartContract is storing smart contract data

func (*SmartContract) AccessColumns 

func (sc *SmartContract) AccessColumns(table string, columns *[]string, update bool) error

AccessColumns checks access rights to the columns

func (*SmartContract) AccessRights 

func (sc *SmartContract) AccessRights(condition string, iscondition bool) error

AccessRights checks the access right by executing the condition value

func (*SmartContract) AccessTable 

func (sc *SmartContract) AccessTable(table, action string) error

func (*SmartContract) AccessTablePerm 

func (sc *SmartContract) AccessTablePerm(table, action string) (map[string]string, error)

AccessTable checks the access right to the table

func (*SmartContract) AppendStack 

func (sc *SmartContract) AppendStack(fn string) error

AppendStack adds an element to the stack of contract call or removes the top element when name is empty

func (*SmartContract) CallContract 

func (sc *SmartContract) CallContract() (string, error)

CallContract calls the contract functions according to the specified flags

func (*SmartContract) CheckAccess 

func (sc *SmartContract) CheckAccess(tableName, columns string, ecosystem int64) (table string, perm map[string]string,
	cols string, err error)

func (*SmartContract) EvalIf 

func (sc *SmartContract) EvalIf(conditions string) (bool, error)

EvalIf counts and returns the logical value of the specified expression

func (*SmartContract) GetContractLimit 

func (sc *SmartContract) GetContractLimit() (ret int64)

GetContractLimit returns the default maximal cost of contract

func (SmartContract) GetLogger 

func (sc SmartContract) GetLogger() *log.Entry

GetLogger is returning logger

func (*SmartContract) GetSignedBy 

func (sc *SmartContract) GetSignedBy(public []byte) (int64, error)

func (*SmartContract) IsCustomTable 

func (sc *SmartContract) IsCustomTable(table string) (isCustom bool, err error)

func (*SmartContract) PopStack 

func (sc *SmartContract) PopStack(fn string)

type SysRollData 

type SysRollData struct {
	Type        string `json:"type,omitempty"`
	EcosystemID int64  `json:"ecosystem,omitempty"`
	ID          int64  `json:"id,omitempty"`
	Data        string `json:"data,omitempty"`
	TableName   string `json:"table,omitempty"`
}

type TableInfo 

type TableInfo struct {
	Columns map[string]string
	Table   *model.Table
}

type ThrowError 

type ThrowError struct {
	Type    string `json:"type"`
	Code    string `json:"id"`
	ErrText string `json:"error"`
}

func (*ThrowError) Error 

func (throw *ThrowError) Error() string

type TxInfo 

type TxInfo struct {
	Block    string                 `json:"block,omitempty"`
	Contract string                 `json:"contract,omitempty"`
	Params   map[string]interface{} `json:"params,omitempty"`
}

func TransactionData 

func TransactionData(blockId int64, hash []byte) (data *TxInfo, err error)

type TxSignJSON 

type TxSignJSON struct {
	ForSign string    `json:"forsign"`
	Field   string    `json:"field"`
	Title   string    `json:"title"`
	Params  []SignRes `json:"params"`
}

TxSignJSON is a structure for additional signs of transaction

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