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fix: custom CBOR marshaling for ShelleyGenesisConfig #818

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Merged
merged 1 commit into from
Dec 31, 2024
Merged

fix: custom CBOR marshaling for ShelleyGenesisConfig #818

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96 changes: 94 additions & 2 deletions ledger/shelley/genesis.go
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Original file line number Diff line number Diff line change
Expand Up @@ -15,19 +15,22 @@
package shelley

import (
"encoding/hex"
"encoding/json"
"io"
"os"
"time"

"github.com/blinklabs-io/gouroboros/cbor"
"github.com/blinklabs-io/gouroboros/ledger/common"
)

type ShelleyGenesis struct {
cbor.StructAsArray
SystemStart time.Time `json:"systemStart"`
NetworkMagic uint32 `json:"networkMagic"`
NetworkId string `json:"networkid"`
ActiveSlotsCoeff float32 `json:"activeSlotsCoeff"`
ActiveSlotsCoeff common.GenesisRat `json:"activeSlotsCoeff"`
SecurityParam int `json:"securityParam"`
EpochLength int `json:"epochLength"`
SlotsPerKESPeriod int `json:"slotsPerKESPeriod"`
Expand All @@ -36,12 +39,67 @@ type ShelleyGenesis struct {
UpdateQuorum int `json:"updateQuorum"`
MaxLovelaceSupply uint64 `json:"maxLovelaceSupply"`
ProtocolParameters ShelleyGenesisProtocolParams `json:"protocolParams"`
GenDelegs map[string]map[string]any `json:"genDelegs"`
GenDelegs map[string]map[string]string `json:"genDelegs"`
InitialFunds map[string]any `json:"initialFunds"`
Staking any `json:"staking"`
}

func (g ShelleyGenesis) MarshalCBOR() ([]byte, error) {
genDelegs := map[cbor.ByteString][]cbor.ByteString{}
for k, v := range g.GenDelegs {
keyBytes, err := hex.DecodeString(k)
if err != nil {
return nil, err
}
vrfBytes, err := hex.DecodeString(v["vrf"])
if err != nil {
return nil, err
}
delegateBytes, err := hex.DecodeString(v["delegate"])
if err != nil {
return nil, err
}
genDelegs[cbor.NewByteString(keyBytes)] = []cbor.ByteString{
cbor.NewByteString(delegateBytes),
cbor.NewByteString(vrfBytes),
}
}
staking := []any{}
if g.Staking == nil {
staking = []any{
map[any]any{},
map[any]any{},
}
}
tmpData := []any{
[]any{
g.SystemStart.Year(),
g.SystemStart.YearDay(),
g.SystemStart.Nanosecond() * 1000,
},
g.NetworkMagic,
map[string]int{"Testnet": 0, "Mainnet": 1}[g.NetworkId],
[]any{
g.ActiveSlotsCoeff.Num().Int64(),
g.ActiveSlotsCoeff.Denom().Int64(),
},
g.SecurityParam,
g.EpochLength,
g.SlotsPerKESPeriod,
g.MaxKESEvolutions,
g.SlotLength * 1_000_000,
g.UpdateQuorum,
g.MaxLovelaceSupply,
g.ProtocolParameters,
genDelegs,
g.InitialFunds,
staking,
}
return cbor.Encode(tmpData)
}

type ShelleyGenesisProtocolParams struct {
cbor.StructAsArray
MinFeeA uint
MinFeeB uint
MaxBlockBodySize uint
Expand All @@ -64,6 +122,40 @@ type ShelleyGenesisProtocolParams struct {
MinPoolCost uint
}

func (p ShelleyGenesisProtocolParams) MarshalCBOR() ([]byte, error) {
tmpData := []any{
p.MinFeeA,
p.MinFeeB,
p.MaxBlockBodySize,
p.MaxTxSize,
p.MaxBlockHeaderSize,
p.KeyDeposit,
p.PoolDeposit,
p.MaxEpoch,
p.NOpt,
cbor.Rat{
Rat: p.A0.Rat,
},
cbor.Rat{
Rat: p.Rho.Rat,
},
cbor.Rat{
Rat: p.Tau.Rat,
},
cbor.Rat{
Rat: p.Decentralization.Rat,
},
[]any{
map[string]int{"NeutralNonce": 0}[p.ExtraEntropy["Tag"]],
},
p.ProtocolVersion.Major,
p.ProtocolVersion.Minor,
p.MinUtxoValue,
p.MinPoolCost,
}
return cbor.Encode(tmpData)
}

func NewShelleyGenesisFromReader(r io.Reader) (ShelleyGenesis, error) {
var ret ShelleyGenesis
dec := json.NewDecoder(r)
Expand Down
10 changes: 6 additions & 4 deletions ledger/shelley/genesis_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -107,9 +107,11 @@ var expectedGenesisObj = shelley.ShelleyGenesis{
0,
time.UTC,
),
NetworkMagic: 764824073,
NetworkId: "Mainnet",
ActiveSlotsCoeff: 0.05,
NetworkMagic: 764824073,
NetworkId: "Mainnet",
ActiveSlotsCoeff: common.GenesisRat{
Rat: big.NewRat(5, 100),
},
SecurityParam: 2160,
EpochLength: 432000,
SlotsPerKESPeriod: 129600,
Expand Down Expand Up @@ -144,7 +146,7 @@ var expectedGenesisObj = shelley.ShelleyGenesis{
MinUtxoValue: 1000000,
MinPoolCost: 340000000,
},
GenDelegs: map[string]map[string]any{
GenDelegs: map[string]map[string]string{
"162f94554ac8c225383a2248c245659eda870eaa82d0ef25fc7dcd82": {
"delegate": "4485708022839a7b9b8b639a939c85ec0ed6999b5b6dc651b03c43f6",
"vrf": "aba81e764b71006c515986bf7b37a72fbb5554f78e6775f08e384dbd572a4b32",
Expand Down
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