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extrinsic.go
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extrinsic.go
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package stafi_decoder
import (
"fmt"
"github.com/itering/scale.go/utiles"
"github.com/shopspring/decimal"
commonTypes "github.com/stafiprotocol/go-substrate-rpc-client/types/common"
"golang.org/x/crypto/blake2b"
)
type ExtrinsicDecoder struct {
ScaleDecoder
ExtrinsicLength int `json:"extrinsic_length"`
ExtrinsicHash string `json:"extrinsic_hash"`
VersionInfo string `json:"version_info"`
ContainsTransaction bool `json:"contains_transaction"`
Address interface{} `json:"address"`
Signature string `json:"signature"`
SignatureVersion int `json:"signature_version"`
Nonce int `json:"nonce"`
Era string `json:"era"`
CallIndex string `json:"call_index"`
Tip interface{} `json:"tip"`
CallModule MetadataModules `json:"call_module"`
Call MetadataCalls `json:"call"`
Params []commonTypes.ExtrinsicParam `json:"params"`
Metadata *MetadataStruct
}
func (e *ExtrinsicDecoder) Init(data ScaleBytes, option *ScaleDecoderOption) {
if option == nil || option.Metadata == nil {
panic("ExtrinsicDecoder option metadata required")
}
e.Params = []commonTypes.ExtrinsicParam{}
e.Metadata = option.Metadata
e.ScaleDecoder.Init(data, option)
}
func (e *ExtrinsicDecoder) generateHash() string {
if !e.ContainsTransaction {
return ""
}
var extrinsicData []byte
if e.ExtrinsicLength > 0 {
extrinsicData = e.Data.Data
} else {
extrinsicLengthType := CompactU32{}
extrinsicLengthType.Encode(len(e.Data.Data))
extrinsicData = append(extrinsicLengthType.Data.Data[:], e.Data.Data[:]...)
}
checksum, _ := blake2b.New(32, []byte{})
_, _ = checksum.Write(extrinsicData)
h := checksum.Sum(nil)
return utiles.BytesToHex(h)
}
func (e *ExtrinsicDecoder) Process() {
e.ExtrinsicLength = e.ProcessAndUpdateData("Compact<u32>").(int)
if e.ExtrinsicLength != e.Data.GetRemainingLength() {
e.ExtrinsicLength = 0
e.Data.Reset()
}
e.VersionInfo = utiles.BytesToHex(e.NextBytes(1))
e.ContainsTransaction = utiles.U256(e.VersionInfo).Int64() >= 80
result := map[string]interface{}{
"extrinsic_length": e.ExtrinsicLength,
"version_info": e.VersionInfo,
}
if e.VersionInfo == "01" || e.VersionInfo == "81" {
if e.ContainsTransaction {
e.Address = e.ProcessAndUpdateData("Address").(string)
e.Signature = e.ProcessAndUpdateData("Signature").(string)
e.Nonce = e.ProcessAndUpdateData("Compact<u32>").(int)
e.Era = e.ProcessAndUpdateData("Era").(string)
e.ExtrinsicHash = e.generateHash()
}
e.CallIndex = utiles.BytesToHex(e.NextBytes(2))
} else if e.VersionInfo == "02" || e.VersionInfo == "82" {
if e.ContainsTransaction {
e.Address = e.ProcessAndUpdateData("Address").(string)
e.Signature = e.ProcessAndUpdateData("Signature").(string)
e.Era = e.ProcessAndUpdateData("Era").(string)
e.Nonce = int(e.ProcessAndUpdateData("Compact<U64>").(uint64))
e.Tip = e.ProcessAndUpdateData("Compact<Balance>").(decimal.Decimal)
e.ExtrinsicHash = e.generateHash()
}
e.CallIndex = utiles.BytesToHex(e.NextBytes(2))
} else if e.VersionInfo == "03" || e.VersionInfo == "83" {
if e.ContainsTransaction {
e.Address = e.ProcessAndUpdateData("Address").(string)
e.Signature = e.ProcessAndUpdateData("Signature").(string)
e.Era = e.ProcessAndUpdateData("Era").(string)
e.Nonce = int(e.ProcessAndUpdateData("Compact<U64>").(uint64))
e.Tip = e.ProcessAndUpdateData("Compact<Balance>").(decimal.Decimal)
e.ExtrinsicHash = e.generateHash()
}
e.CallIndex = utiles.BytesToHex(e.NextBytes(2))
} else if e.VersionInfo == "04" || e.VersionInfo == "84" {
if e.ContainsTransaction {
address := e.ProcessAndUpdateData("Address")
switch v := address.(type) {
case string:
e.Address = v
result["address_type"] = "AccountId"
case map[string]interface{}:
for name, value := range v {
result["address_type"] = name
e.Address = value
}
}
e.SignatureVersion = e.ProcessAndUpdateData("U8").(int)
if e.SignatureVersion == 2 {
e.Signature = e.ProcessAndUpdateData("EcdsaSignature").(string)
} else {
e.Signature = e.ProcessAndUpdateData("Signature").(string)
}
e.Era = e.ProcessAndUpdateData("EraExtrinsic").(string)
e.Nonce = int(e.ProcessAndUpdateData("Compact<U64>").(uint64))
if e.Metadata.Extrinsic != nil {
if utiles.SliceIndex("ChargeTransactionPayment", e.Metadata.Extrinsic.SignedExtensions) != -1 {
e.Tip = e.ProcessAndUpdateData("Compact<Balance>")
}
} else {
e.Tip = e.ProcessAndUpdateData("Compact<Balance>")
}
e.ExtrinsicHash = e.generateHash()
}
e.CallIndex = utiles.BytesToHex(e.NextBytes(2))
} else {
panic(fmt.Sprintf("Extrinsics version %s is not support", e.VersionInfo))
}
if e.CallIndex == "" {
panic("Not find Extrinsic Lookup, please check type registry")
}
call, ok := e.Metadata.CallIndex[e.CallIndex]
if !ok {
panic(fmt.Sprintf("Not find Extrinsic Lookup %s, please check metadata info", e.CallIndex))
}
e.Call = call.Call
e.CallModule = call.Module
for _, arg := range e.Call.Args {
e.Params = append(e.Params, commonTypes.ExtrinsicParam{
Name: arg.Name,
Type: arg.Type,
Value: e.ProcessAndUpdateData(arg.Type)})
}
if e.ContainsTransaction {
result["account_id"] = e.Address
result["signature"] = e.Signature
result["nonce"] = e.Nonce
result["era"] = e.Era
result["extrinsic_hash"] = e.ExtrinsicHash
}
if e.CallIndex != "" {
result["call_code"] = e.CallIndex
result["call_module_function"] = e.Call.Name
result["call_module"] = e.CallModule.Name
}
result["nonce"] = e.Nonce
result["era"] = e.Era
result["tip"] = e.Tip
result["params"] = e.Params
e.Value = result
}