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models.go
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models.go
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package types
import (
"bytes"
"database/sql/driver"
"encoding/json"
"fmt"
"math/big"
"regexp"
"strings"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/core/types"
"github.com/pkg/errors"
"github.com/ugorji/go/codec"
commontypes "github.com/smartcontractkit/chainlink/v2/common/types"
"github.com/smartcontractkit/chainlink/v2/core/assets"
"github.com/smartcontractkit/chainlink/v2/core/chains/evm/types/internal/blocks"
"github.com/smartcontractkit/chainlink/v2/core/null"
"github.com/smartcontractkit/chainlink/v2/core/utils"
)
// Head represents a BlockNumber, BlockHash.
type Head struct {
ID uint64
Hash common.Hash
Number int64
L1BlockNumber null.Int64
ParentHash common.Hash
Parent *Head
EVMChainID *utils.Big
Timestamp time.Time
CreatedAt time.Time
BaseFeePerGas *assets.Wei
ReceiptsRoot common.Hash
TransactionsRoot common.Hash
StateRoot common.Hash
Difficulty *utils.Big
TotalDifficulty *utils.Big
}
var _ commontypes.Head[common.Hash] = &Head{}
// NewHead returns a Head instance.
func NewHead(number *big.Int, blockHash common.Hash, parentHash common.Hash, timestamp uint64, chainID *utils.Big) Head {
return Head{
Number: number.Int64(),
Hash: blockHash,
ParentHash: parentHash,
Timestamp: time.Unix(int64(timestamp), 0),
EVMChainID: chainID,
}
}
func (h *Head) BlockNumber() int64 {
return h.Number
}
func (h *Head) BlockHash() common.Hash {
return h.Hash
}
func (h *Head) GetParent() commontypes.Head[common.Hash] {
if h.Parent == nil {
return nil
}
return h.Parent
}
// EarliestInChain recurses through parents until it finds the earliest one
func (h *Head) EarliestInChain() *Head {
for h.Parent != nil {
h = h.Parent
}
return h
}
// EarliestHeadInChain recurses through parents until it finds the earliest one
func (h *Head) EarliestHeadInChain() commontypes.Head[common.Hash] {
return h.EarliestInChain()
}
// IsInChain returns true if the given hash matches the hash of a head in the chain
func (h *Head) IsInChain(blockHash common.Hash) bool {
for {
if h.Hash == blockHash {
return true
}
if h.Parent != nil {
h = h.Parent
} else {
break
}
}
return false
}
// HashAtHeight returns the hash of the block at the given height, if it is in the chain.
// If not in chain, returns the zero hash
func (h *Head) HashAtHeight(blockNum int64) common.Hash {
for {
if h.Number == blockNum {
return h.Hash
}
if h.Parent != nil {
h = h.Parent
} else {
break
}
}
return common.Hash{}
}
// ChainLength returns the length of the chain followed by recursively looking up parents
func (h *Head) ChainLength() uint32 {
if h == nil {
return 0
}
l := uint32(1)
for {
if h.Parent != nil {
l++
if h == h.Parent {
panic("circular reference detected")
}
h = h.Parent
} else {
break
}
}
return l
}
// ChainHashes returns an array of block hashes by recursively looking up parents
func (h *Head) ChainHashes() []common.Hash {
var hashes []common.Hash
for {
hashes = append(hashes, h.Hash)
if h.Parent != nil {
if h == h.Parent {
panic("circular reference detected")
}
h = h.Parent
} else {
break
}
}
return hashes
}
func (h *Head) ChainString() string {
var sb strings.Builder
for {
sb.WriteString(h.String())
if h.Parent != nil {
if h == h.Parent {
panic("circular reference detected")
}
sb.WriteString("->")
h = h.Parent
} else {
break
}
}
sb.WriteString("->nil")
return sb.String()
}
// String returns a string representation of this head
func (h *Head) String() string {
return fmt.Sprintf("Head{Number: %d, Hash: %s, ParentHash: %s}", h.ToInt(), h.Hash.Hex(), h.ParentHash.Hex())
}
// ToInt return the height as a *big.Int. Also handles nil by returning nil.
func (h *Head) ToInt() *big.Int {
if h == nil {
return nil
}
return big.NewInt(h.Number)
}
// GreaterThan compares BlockNumbers and returns true if the receiver BlockNumber is greater than
// the supplied BlockNumber
func (h *Head) GreaterThan(r *Head) bool {
if h == nil {
return false
}
if h != nil && r == nil {
return true
}
return h.Number > r.Number
}
// NextInt returns the next BlockNumber as big.int, or nil if nil to represent latest.
func (h *Head) NextInt() *big.Int {
if h == nil {
return nil
}
return new(big.Int).Add(h.ToInt(), big.NewInt(1))
}
func (h *Head) UnmarshalJSON(bs []byte) error {
type head struct {
Hash common.Hash `json:"hash"`
Number *hexutil.Big `json:"number"`
ParentHash common.Hash `json:"parentHash"`
Timestamp hexutil.Uint64 `json:"timestamp"`
L1BlockNumber *hexutil.Big `json:"l1BlockNumber"`
BaseFeePerGas *hexutil.Big `json:"baseFeePerGas"`
ReceiptsRoot common.Hash `json:"receiptsRoot"`
TransactionsRoot common.Hash `json:"transactionsRoot"`
StateRoot common.Hash `json:"stateRoot"`
Difficulty *hexutil.Big `json:"difficulty"`
TotalDifficulty *hexutil.Big `json:"totalDifficulty"`
}
var jsonHead head
err := json.Unmarshal(bs, &jsonHead)
if err != nil {
return err
}
if jsonHead.Number == nil {
*h = Head{}
return nil
}
h.Hash = jsonHead.Hash
h.Number = (*big.Int)(jsonHead.Number).Int64()
h.ParentHash = jsonHead.ParentHash
h.Timestamp = time.Unix(int64(jsonHead.Timestamp), 0).UTC()
h.BaseFeePerGas = assets.NewWei((*big.Int)(jsonHead.BaseFeePerGas))
if jsonHead.L1BlockNumber != nil {
h.L1BlockNumber = null.Int64From((*big.Int)(jsonHead.L1BlockNumber).Int64())
}
h.ReceiptsRoot = jsonHead.ReceiptsRoot
h.TransactionsRoot = jsonHead.TransactionsRoot
h.StateRoot = jsonHead.StateRoot
h.Difficulty = utils.NewBig(jsonHead.Difficulty.ToInt())
h.TotalDifficulty = utils.NewBig(jsonHead.TotalDifficulty.ToInt())
return nil
}
func (h *Head) MarshalJSON() ([]byte, error) {
type head struct {
Hash *common.Hash `json:"hash,omitempty"`
Number *hexutil.Big `json:"number,omitempty"`
ParentHash *common.Hash `json:"parentHash,omitempty"`
Timestamp *hexutil.Uint64 `json:"timestamp,omitempty"`
ReceiptsRoot *common.Hash `json:"receiptsRoot,omitempty"`
TransactionsRoot *common.Hash `json:"transactionsRoot,omitempty"`
StateRoot *common.Hash `json:"stateRoot,omitempty"`
Difficulty *hexutil.Big `json:"difficulty,omitempty"`
TotalDifficulty *hexutil.Big `json:"totalDifficulty,omitempty"`
}
var jsonHead head
if h.Hash != (common.Hash{}) {
jsonHead.Hash = &h.Hash
}
if h.ReceiptsRoot != (common.Hash{}) {
jsonHead.ReceiptsRoot = &h.ReceiptsRoot
}
if h.TransactionsRoot != (common.Hash{}) {
jsonHead.TransactionsRoot = &h.TransactionsRoot
}
if h.StateRoot != (common.Hash{}) {
jsonHead.StateRoot = &h.StateRoot
}
jsonHead.Number = (*hexutil.Big)(big.NewInt(int64(h.Number)))
if h.ParentHash != (common.Hash{}) {
jsonHead.ParentHash = &h.ParentHash
}
if h.Timestamp != (time.Time{}) {
t := hexutil.Uint64(h.Timestamp.UTC().Unix())
jsonHead.Timestamp = &t
}
jsonHead.Difficulty = (*hexutil.Big)(h.Difficulty)
jsonHead.TotalDifficulty = (*hexutil.Big)(h.TotalDifficulty)
return json.Marshal(jsonHead)
}
// Block represents an ethereum block
// This type is only used for the block history estimator, and can be expensive to unmarshal. Don't add unnecessary fields here.
type Block struct {
Number int64
Hash common.Hash
ParentHash common.Hash
BaseFeePerGas *assets.Wei
Timestamp time.Time
Transactions []Transaction
}
// MarshalJSON implements json marshalling for Block
func (b Block) MarshalJSON() ([]byte, error) {
bi := &blocks.BlockInternal{
Number: hexutil.EncodeBig(big.NewInt(b.Number)),
Hash: b.Hash,
ParentHash: b.ParentHash,
BaseFeePerGas: (*hexutil.Big)(b.BaseFeePerGas),
Timestamp: (hexutil.Uint64)(uint64(b.Timestamp.Unix())),
Transactions: toInternalTxnSlice(b.Transactions),
}
buf := bytes.NewBuffer(make([]byte, 0, 1024))
enc := codec.NewEncoder(buf, &codec.JsonHandle{})
err := enc.Encode(bi)
if err != nil {
return nil, err
}
return buf.Bytes(), nil
}
var ErrMissingBlock = errors.New("missing block")
// UnmarshalJSON unmarshals to a Block
func (b *Block) UnmarshalJSON(data []byte) error {
var h codec.Handle = new(codec.JsonHandle)
bi := blocks.BlockInternal{}
dec := codec.NewDecoderBytes(data, h)
err := dec.Decode(&bi)
if err != nil {
return err
}
if bi.Empty() {
return errors.WithStack(ErrMissingBlock)
}
n, err := hexutil.DecodeBig(bi.Number)
if err != nil {
return errors.Wrapf(err, "failed to decode block number while unmarshalling block, got: '%s' in '%s'", bi.Number, data)
}
*b = Block{
Number: n.Int64(),
Hash: bi.Hash,
ParentHash: bi.ParentHash,
BaseFeePerGas: (*assets.Wei)(bi.BaseFeePerGas),
Timestamp: time.Unix((int64((uint64)(bi.Timestamp))), 0),
Transactions: fromInternalTxnSlice(bi.Transactions),
}
return nil
}
// thin public wrapper for internal type of the same name
// and which has to be internal for JSON un/marshal'ing code gen consistency
type TxType uint8
// Transaction represents an ethereum transaction
// Use our own type because geth's type has validation failures on e.g. zero
// gas used, which can occur on other chains.
// This type is only used for the block history estimator, and can be expensive to unmarshal. Don't add unnecessary fields here.
type Transaction struct {
GasPrice *assets.Wei `json:"gasPrice"`
GasLimit uint32 `json:"gasLimit"`
MaxFeePerGas *assets.Wei `json:"maxFeePerGas"`
MaxPriorityFeePerGas *assets.Wei `json:"maxPriorityFeePerGas"`
Type TxType `json:"type"`
Hash common.Hash `json:"hash"`
}
const LegacyTxType = blocks.TxType(0x0)
// UnmarshalJSON unmarshals a Transaction
func (t *Transaction) UnmarshalJSON(data []byte) error {
var h codec.Handle = new(codec.JsonHandle)
ti := blocks.TransactionInternal{}
dec := codec.NewDecoderBytes(data, h)
err := dec.Decode(&ti)
if err != nil {
return err
}
if ti.Gas == nil {
return errors.Errorf("expected 'gas' to not be null, got: '%s'", data)
}
if ti.Type == nil {
tpe := LegacyTxType
ti.Type = &tpe
}
*t = fromInternalTxn(ti)
return nil
}
func (t *Transaction) MarshalJSON() ([]byte, error) {
ti := toInternalTxn(*t)
buf := bytes.NewBuffer(make([]byte, 0, 256))
enc := codec.NewEncoder(buf, &codec.JsonHandle{})
err := enc.Encode(ti)
if err != nil {
return nil, err
}
return buf.Bytes(), nil
}
// WeiPerEth is amount of Wei currency units in one Eth.
var WeiPerEth = new(big.Int).Exp(big.NewInt(10), big.NewInt(18), nil)
// ChainlinkFulfilledTopic is the signature for the event emitted after calling
// ChainlinkClient.validateChainlinkCallback(requestId). See
// ../../contracts/src/v0.6/ChainlinkClient.sol
var ChainlinkFulfilledTopic = utils.MustHash("ChainlinkFulfilled(bytes32)")
// ReceiptIndicatesRunLogFulfillment returns true if this tx receipt is the result of a
// fulfilled run log.
func ReceiptIndicatesRunLogFulfillment(txr types.Receipt) bool {
for _, log := range txr.Logs {
if log.Topics[0] == ChainlinkFulfilledTopic {
return true
}
}
return false
}
// FunctionSelector is the first four bytes of the call data for a
// function call and specifies the function to be called.
type FunctionSelector [FunctionSelectorLength]byte
// FunctionSelectorLength should always be a length of 4 as a byte.
const FunctionSelectorLength = 4
// BytesToFunctionSelector converts the given bytes to a FunctionSelector.
func BytesToFunctionSelector(b []byte) FunctionSelector {
var f FunctionSelector
f.SetBytes(b)
return f
}
// HexToFunctionSelector converts the given string to a FunctionSelector.
func HexToFunctionSelector(s string) FunctionSelector {
return BytesToFunctionSelector(common.FromHex(s))
}
// String returns the FunctionSelector as a string type.
func (f FunctionSelector) String() string { return hexutil.Encode(f[:]) }
// Bytes returns the FunctionSelector as a byte slice
func (f FunctionSelector) Bytes() []byte { return f[:] }
// SetBytes sets the FunctionSelector to that of the given bytes (will trim).
func (f *FunctionSelector) SetBytes(b []byte) { copy(f[:], b[:FunctionSelectorLength]) }
var hexRegexp = regexp.MustCompile("^[0-9a-fA-F]*$")
func unmarshalFromString(s string, f *FunctionSelector) error {
if utils.HasHexPrefix(s) {
if !hexRegexp.Match([]byte(s)[2:]) {
return fmt.Errorf("function selector %s must be 0x-hex encoded", s)
}
bytes := common.FromHex(s)
if len(bytes) != FunctionSelectorLength {
return errors.New("function ID must be 4 bytes in length")
}
f.SetBytes(bytes)
} else {
bytes, err := utils.Keccak256([]byte(s))
if err != nil {
return err
}
f.SetBytes(bytes[0:4])
}
return nil
}
// UnmarshalJSON parses the raw FunctionSelector and sets the FunctionSelector
// type to the given input.
func (f *FunctionSelector) UnmarshalJSON(input []byte) error {
var s string
err := json.Unmarshal(input, &s)
if err != nil {
return err
}
return unmarshalFromString(s, f)
}
// MarshalJSON returns the JSON encoding of f
func (f FunctionSelector) MarshalJSON() ([]byte, error) {
return json.Marshal(f.String())
}
// Value returns this instance serialized for database storage
func (f FunctionSelector) Value() (driver.Value, error) {
return f.Bytes(), nil
}
// Scan returns the selector from its serialization in the database
func (f *FunctionSelector) Scan(value interface{}) error {
temp, ok := value.([]byte)
if !ok {
return fmt.Errorf("unable to convent %v of type %T to FunctionSelector", value, value)
}
if len(temp) != FunctionSelectorLength {
return fmt.Errorf("function selector %v should have length %d, but has length %d",
temp, FunctionSelectorLength, len(temp))
}
copy(f[:], temp)
return nil
}
// This data can contain anything and is submitted by user on-chain, so we must
// be extra careful how we interact with it
type UntrustedBytes []byte
// SafeByteSlice returns an error on out of bounds access to a byte array, where a
// normal slice would panic instead
func (ary UntrustedBytes) SafeByteSlice(start int, end int) ([]byte, error) {
if end > len(ary) || start > end || start < 0 || end < 0 {
var empty []byte
return empty, errors.New("out of bounds slice access")
}
return ary[start:end], nil
}
// toInternalTxn converts a Transaction into the internal intermediate representation
func toInternalTxn(txn Transaction) blocks.TransactionInternal {
gas := (hexutil.Uint64)(uint64(txn.GasLimit))
itype := blocks.TxType(txn.Type)
return blocks.TransactionInternal{
GasPrice: (*hexutil.Big)(txn.GasPrice),
Gas: &gas,
MaxFeePerGas: (*hexutil.Big)(txn.MaxFeePerGas),
MaxPriorityFeePerGas: (*hexutil.Big)(txn.MaxPriorityFeePerGas),
Type: &itype,
Hash: txn.Hash,
}
}
// toInternalTxn converts a []Transaction into the internal intermediate representation
func toInternalTxnSlice(txns []Transaction) []blocks.TransactionInternal {
out := make([]blocks.TransactionInternal, len(txns))
for i, txn := range txns {
out[i] = toInternalTxn(txn)
}
return out
}
// fromInternalTxn converts an internal intermediate representation into a Transaction
func fromInternalTxn(ti blocks.TransactionInternal) Transaction {
if ti.Type == nil {
tpe := LegacyTxType
ti.Type = &tpe
}
return Transaction{
GasPrice: (*assets.Wei)(ti.GasPrice),
GasLimit: uint32(*ti.Gas),
MaxFeePerGas: (*assets.Wei)(ti.MaxFeePerGas),
MaxPriorityFeePerGas: (*assets.Wei)(ti.MaxPriorityFeePerGas),
Type: TxType(*ti.Type),
Hash: ti.Hash,
}
}
// fromInternalTxnSlice converts a slice of internal intermediate representation into a []Transaction
func fromInternalTxnSlice(tis []blocks.TransactionInternal) []Transaction {
out := make([]Transaction, len(tis))
for i, ti := range tis {
out[i] = fromInternalTxn(ti)
}
return out
}