path: root/rpc/args.go

package rpc

import (
    "bytes"
    "encoding/json"
    "math/big"

    "github.com/ethereum/go-ethereum/common"
)

func blockAge(raw interface{}, number *int64) (err error) {
    // Parse as integer
    num, ok := raw.(float64)
    if ok {
        *number = int64(num)
        return nil
    }

    // Parse as string/hexstring
    str, ok := raw.(string)
    if !ok {
        return NewDecodeParamError("BlockNumber is not a string")
    }

    switch str {
    case "latest":
        *number = -1
    case "pending":
        *number = 0
    default:
        *number = common.String2Big(str).Int64()
    }

    return nil
}

type GetBlockByHashArgs struct {
    BlockHash  string
    IncludeTxs bool
}

func (args *GetBlockByHashArgs) UnmarshalJSON(b []byte) (err error) {
    var obj []interface{}
    r := bytes.NewReader(b)
    if err := json.NewDecoder(r).Decode(&obj); err != nil {
        return NewDecodeParamError(err.Error())
    }

    if len(obj) < 1 {
        return NewInsufficientParamsError(len(obj), 1)
    }

    argstr, ok := obj[0].(string)
    if !ok {
        return NewDecodeParamError("BlockHash not a string")
    }
    args.BlockHash = argstr

    if len(obj) > 1 {
        args.IncludeTxs = obj[1].(bool)
    }

    return nil
}

type GetBlockByNumberArgs struct {
    BlockNumber int64
    IncludeTxs  bool
}

func (args *GetBlockByNumberArgs) UnmarshalJSON(b []byte) (err error) {
    var obj []interface{}
    r := bytes.NewReader(b)
    if err := json.NewDecoder(r).Decode(&obj); err != nil {
        return NewDecodeParamError(err.Error())
    }

    if len(obj) < 1 {
        return NewInsufficientParamsError(len(obj), 1)
    }

    if v, ok := obj[0].(float64); ok {
        args.BlockNumber = int64(v)
    } else {
        args.BlockNumber = common.Big(obj[0].(string)).Int64()
    }

    if len(obj) > 1 {
        args.IncludeTxs = obj[1].(bool)
    }

    return nil
}

type NewTxArgs struct {
    From     string
    To       string
    Value    *big.Int
    Gas      *big.Int
    GasPrice *big.Int
    Data     string

    BlockNumber int64
}

func (args *NewTxArgs) UnmarshalJSON(b []byte) (err error) {
    var obj []json.RawMessage
    var ext struct{ From, To, Value, Gas, GasPrice, Data string }

    // Decode byte slice to array of RawMessages
    if err := json.Unmarshal(b, &obj); err != nil {
        return NewDecodeParamError(err.Error())
    }

    // Check for sufficient params
    if len(obj) < 1 {
        return NewInsufficientParamsError(len(obj), 1)
    }

    // Decode 0th RawMessage to temporary struct
    if err := json.Unmarshal(obj[0], &ext); err != nil {
        return NewDecodeParamError(err.Error())
    }

    // var ok bool
    args.From = ext.From
    args.To = ext.To
    args.Value = common.String2Big(ext.Value)
    args.Gas = common.String2Big(ext.Gas)
    args.GasPrice = common.String2Big(ext.GasPrice)
    args.Data = ext.Data

    // Check for optional BlockNumber param
    if len(obj) > 1 {
        var raw interface{}
        if err = json.Unmarshal(obj[1], &raw); err != nil {
            return NewDecodeParamError(err.Error())
        }

        if err := blockAge(raw, &args.BlockNumber); err != nil {
            return err
        }
    }

    return nil
}

func (args *NewTxArgs) requirements() error {
    if len(args.From) == 0 {
        return NewValidationError("From", "Is required")
    }
    return nil
}

type GetStorageArgs struct {
    Address     string
    BlockNumber int64
}

func (args *GetStorageArgs) UnmarshalJSON(b []byte) (err error) {
    var obj []interface{}
    if err := json.Unmarshal(b, &obj); err != nil {
        return NewDecodeParamError(err.Error())
    }

    if len(obj) < 1 {
        return NewInsufficientParamsError(len(obj), 1)
    }

    addstr, ok := obj[0].(string)
    if !ok {
        return NewDecodeParamError("Address is not a string")
    }
    args.Address = addstr

    if len(obj) > 1 {
        if err := blockAge(obj[1], &args.BlockNumber); err != nil {
            return err
        }
    }

    return nil
}

func (args *GetStorageArgs) requirements() error {
    if len(args.Address) == 0 {
        return NewValidationError("Address", "cannot be blank")
    }
    return nil
}

type GetStorageAtArgs struct {
    Address     string
    Key         string
    BlockNumber int64
}

func (args *GetStorageAtArgs) UnmarshalJSON(b []byte) (err error) {
    var obj []interface{}
    if err := json.Unmarshal(b, &obj); err != nil {
        return NewDecodeParamError(err.Error())
    }

    if len(obj) < 2 {
        return NewInsufficientParamsError(len(obj), 2)
    }

    addstr, ok := obj[0].(string)
    if !ok {
        return NewDecodeParamError("Address is not a string")
    }
    args.Address = addstr

    keystr, ok := obj[1].(string)
    if !ok {
        return NewDecodeParamError("Key is not a string")
    }
    args.Key = keystr

    if len(obj) > 2 {
        if err := blockAge(obj[2], &args.BlockNumber); err != nil {
            return err
        }
    }

    return nil
}

func (args *GetStorageAtArgs) requirements() error {
    if len(args.Address) == 0 {
        return NewValidationError("Address", "cannot be blank")
    }

    if len(args.Key) == 0 {
        return NewValidationError("Key", "cannot be blank")
    }
    return nil
}

type GetTxCountArgs struct {
    Address     string
    BlockNumber int64
}

func (args *GetTxCountArgs) UnmarshalJSON(b []byte) (err error) {
    var obj []interface{}
    if err := json.Unmarshal(b, &obj); err != nil {
        return NewDecodeParamError(err.Error())
    }

    if len(obj) < 1 {
        return NewInsufficientParamsError(len(obj), 1)
    }

    addstr, ok := obj[0].(string)
    if !ok {
        return NewDecodeParamError("Address is not a string")
    }
    args.Address = addstr

    if len(obj) > 1 {
        if err := blockAge(obj[1], &args.BlockNumber); err != nil {
            return err
        }
    }

    return nil
}

func (args *GetTxCountArgs) requirements() error {
    if len(args.Address) == 0 {
        return NewValidationError("Address", "cannot be blank")
    }
    return nil
}

type GetBalanceArgs struct {
    Address     string
    BlockNumber int64
}

func (args *GetBalanceArgs) UnmarshalJSON(b []byte) (err error) {
    var obj []interface{}
    if err := json.Unmarshal(b, &obj); err != nil {
        return NewDecodeParamError(err.Error())
    }

    if len(obj) < 1 {
        return NewInsufficientParamsError(len(obj), 1)
    }

    addstr, ok := obj[0].(string)
    if !ok {
        return NewDecodeParamError("Address is not a string")
    }
    args.Address = addstr

    if len(obj) > 1 {
        if err := blockAge(obj[1], &args.BlockNumber); err != nil {
            return err
        }
    }

    return nil
}

func (args *GetBalanceArgs) requirements() error {
    if len(args.Address) == 0 {
        return NewValidationError("Address", "cannot be blank")
    }
    return nil
}

type GetDataArgs struct {
    Address     string
    BlockNumber int64
}

func (args *GetDataArgs) UnmarshalJSON(b []byte) (err error) {
    var obj []interface{}
    if err := json.Unmarshal(b, &obj); err != nil {
        return NewDecodeParamError(err.Error())
    }

    if len(obj) < 1 {
        return NewInsufficientParamsError(len(obj), 1)
    }

    addstr, ok := obj[0].(string)
    if !ok {
        return NewDecodeParamError("Address is not a string")
    }
    args.Address = addstr

    if len(obj) > 1 {
        if err := blockAge(obj[1], &args.BlockNumber); err != nil {
            return err
        }
    }

    return nil
}

func (args *GetDataArgs) requirements() error {
    if len(args.Address) == 0 {
        return NewValidationError("Address", "cannot be blank")
    }
    return nil
}

type BlockNumIndexArgs struct {
    BlockNumber int64
    Index       int64
}

func (args *BlockNumIndexArgs) UnmarshalJSON(b []byte) (err error) {
    var obj []interface{}
    r := bytes.NewReader(b)
    if err := json.NewDecoder(r).Decode(&obj); err != nil {
        return NewDecodeParamError(err.Error())
    }

    if len(obj) < 1 {
        return NewInsufficientParamsError(len(obj), 1)
    }

    arg0, ok := obj[0].(string)
    if !ok {
        return NewDecodeParamError("BlockNumber is not string")
    }
    args.BlockNumber = common.Big(arg0).Int64()

    if len(obj) > 1 {
        arg1, ok := obj[1].(string)
        if !ok {
            return NewDecodeParamError("Index not a string")
        }
        args.Index = common.Big(arg1).Int64()
    }

    return nil
}

type HashIndexArgs struct {
    Hash  string
    Index int64
}

func (args *HashIndexArgs) UnmarshalJSON(b []byte) (err error) {
    var obj []interface{}
    r := bytes.NewReader(b)
    if err := json.NewDecoder(r).Decode(&obj); err != nil {
        return NewDecodeParamError(err.Error())
    }

    if len(obj) < 1 {
        return NewInsufficientParamsError(len(obj), 1)
    }

    arg0, ok := obj[0].(string)
    if !ok {
        return NewDecodeParamError("Hash not a string")
    }
    args.Hash = arg0

    if len(obj) > 1 {
        arg1, ok := obj[1].(string)
        if !ok {
            return NewDecodeParamError("Index not a string")
        }
        args.Index = common.Big(arg1).Int64()
    }

    return nil
}

type Sha3Args struct {
    Data string
}

func (args *Sha3Args) UnmarshalJSON(b []byte) (err error) {
    var obj []interface{}
    r := bytes.NewReader(b)
    if err := json.NewDecoder(r).Decode(&obj); err != nil {
        return NewDecodeParamError(err.Error())
    }

    if len(obj) < 1 {
        return NewInsufficientParamsError(len(obj), 1)
    }
    args.Data = obj[0].(string)

    return nil
}

type BlockFilterArgs struct {
    Earliest int64
    Latest   int64
    Address  interface{}
    Topics   []interface{}
    Skip     int
    Max      int
}

func (args *BlockFilterArgs) UnmarshalJSON(b []byte) (err error) {
    var obj []struct {
        FromBlock interface{}   `json:"fromBlock"`
        ToBlock   interface{}   `json:"toBlock"`
        Limit     string        `json:"limit"`
        Offset    string        `json:"offset"`
        Address   string        `json:"address"`
        Topics    []interface{} `json:"topics"`
    }

    if err = json.Unmarshal(b, &obj); err != nil {
        return NewDecodeParamError(err.Error())
    }

    if len(obj) < 1 {
        return NewInsufficientParamsError(len(obj), 1)
    }

    fromstr, ok := obj[0].FromBlock.(string)
    if !ok {
        return NewDecodeParamError("FromBlock is not a string")
    }

    switch fromstr {
    case "latest":
        args.Earliest = 0
    default:
        args.Earliest = int64(common.Big(obj[0].FromBlock.(string)).Int64())
    }

    tostr, ok := obj[0].ToBlock.(string)
    if !ok {
        return NewDecodeParamError("ToBlock is not a string")
    }

    switch tostr {
    case "latest":
        args.Latest = 0
    case "pending":
        args.Latest = -1
    default:
        args.Latest = int64(common.Big(obj[0].ToBlock.(string)).Int64())
    }

    args.Max = int(common.Big(obj[0].Limit).Int64())
    args.Skip = int(common.Big(obj[0].Offset).Int64())
    args.Address = obj[0].Address
    args.Topics = obj[0].Topics

    return nil
}

type DbArgs struct {
    Database string
    Key      string
    Value    string
}

func (args *DbArgs) UnmarshalJSON(b []byte) (err error) {
    var obj []interface{}
    r := bytes.NewReader(b)
    if err := json.NewDecoder(r).Decode(&obj); err != nil {
        return NewDecodeParamError(err.Error())
    }

    if len(obj) < 2 {
        return NewInsufficientParamsError(len(obj), 2)
    }
    args.Database = obj[0].(string)
    args.Key = obj[1].(string)

    if len(obj) > 2 {
        args.Value = obj[2].(string)
    }

    return nil
}

func (a *DbArgs) requirements() error {
    if len(a.Database) == 0 {
        return NewValidationError("Database", "cannot be blank")
    }
    if len(a.Key) == 0 {
        return NewValidationError("Key", "cannot be blank")
    }
    return nil
}

type WhisperMessageArgs struct {
    Payload  string
    To       string
    From     string
    Topics   []string
    Priority uint32
    Ttl      uint32
}

func (args *WhisperMessageArgs) UnmarshalJSON(b []byte) (err error) {
    var obj []struct {
        Payload  string
        To       string
        From     string
        Topics   []string
        Priority string
        Ttl      string
    }

    if err = json.Unmarshal(b, &obj); err != nil {
        return NewDecodeParamError(err.Error())
    }

    if len(obj) < 1 {
        return NewInsufficientParamsError(len(obj), 1)
    }
    args.Payload = obj[0].Payload
    args.To = obj[0].To
    args.From = obj[0].From
    args.Topics = obj[0].Topics
    args.Priority = uint32(common.Big(obj[0].Priority).Int64())
    args.Ttl = uint32(common.Big(obj[0].Ttl).Int64())

    return nil
}

type CompileArgs struct {
    Source string
}

func (args *CompileArgs) UnmarshalJSON(b []byte) (err error) {
    var obj []interface{}
    r := bytes.NewReader(b)
    if err := json.NewDecoder(r).Decode(&obj); err != nil {
        return NewDecodeParamError(err.Error())
    }

    if len(obj) > 0 {
        args.Source = obj[0].(string)
    }

    return nil
}

type FilterStringArgs struct {
    Word string
}

func (args *FilterStringArgs) UnmarshalJSON(b []byte) (err error) {
    var obj []interface{}
    r := bytes.NewReader(b)
    if err := json.NewDecoder(r).Decode(&obj); err != nil {
        return NewDecodeParamError(err.Error())
    }

    if len(obj) < 1 {
        return NewInsufficientParamsError(len(obj), 1)
    }

    var argstr string
    argstr, ok := obj[0].(string)
    if !ok {
        return NewDecodeParamError("Filter is not a string")
    }
    args.Word = argstr

    return nil
}

func (args *FilterStringArgs) requirements() error {
    switch args.Word {
    case "latest", "pending":
        break
    default:
        return NewValidationError("Word", "Must be `latest` or `pending`")
    }
    return nil
}

type FilterIdArgs struct {
    Id int
}

func (args *FilterIdArgs) UnmarshalJSON(b []byte) (err error) {
    var obj []string
    r := bytes.NewReader(b)
    if err := json.NewDecoder(r).Decode(&obj); err != nil {
        return NewDecodeParamError(err.Error())
    }

    if len(obj) < 1 {
        return NewInsufficientParamsError(len(obj), 1)
    }

    args.Id = int(common.Big(obj[0]).Int64())

    return nil
}

type WhisperIdentityArgs struct {
    Identity string
}

func (args *WhisperIdentityArgs) UnmarshalJSON(b []byte) (err error) {
    var obj []string
    r := bytes.NewReader(b)
    if err := json.NewDecoder(r).Decode(&obj); err != nil {
        return NewDecodeParamError(err.Error())
    }

    if len(obj) < 1 {
        return NewInsufficientParamsError(len(obj), 1)
    }

    args.Identity = obj[0]

    return nil
}

type WhisperFilterArgs struct {
    To     string `json:"to"`
    From   string
    Topics []string
}

func (args *WhisperFilterArgs) UnmarshalJSON(b []byte) (err error) {
    var obj []struct {
        To     string
        From   string
        Topics []string
    }

    if err = json.Unmarshal(b, &obj); err != nil {
        return NewDecodeParamError(err.Error())
    }

    if len(obj) < 1 {
        return NewInsufficientParamsError(len(obj), 1)
    }

    args.To = obj[0].To
    args.From = obj[0].From
    args.Topics = obj[0].Topics

    return nil
}

type SubmitWorkArgs struct {
    Nonce  uint64
    Header common.Hash
    Digest common.Hash
}

func (args *SubmitWorkArgs) UnmarshalJSON(b []byte) (err error) {
    var obj []interface{}
    if err = json.Unmarshal(b, &obj); err != nil {
        return NewDecodeParamError(err.Error())
    }

    if len(obj) < 3 {
        return NewInsufficientParamsError(len(obj), 3)
    }

    var objstr string
    var ok bool
    if objstr, ok = obj[0].(string); !ok {
        return NewDecodeParamError("Nonce is not a string")
    }

    args.Nonce = common.BytesToNumber(common.Hex2Bytes(objstr))

    if objstr, ok = obj[1].(string); !ok {
        return NewDecodeParamError("Header is not a string")
    }

    args.Header = common.HexToHash(objstr)

    if objstr, ok = obj[2].(string); !ok {
        return NewDecodeParamError("Digest is not a string")
    }

    args.Digest = common.HexToHash(objstr)

    return nil
}