lotus/node/impl/full/eth_utils.go
Fridrik Asmundsson ba1ee60d1b Refactor eth.go
2023-08-28 17:48:22 +00:00

690 lines
21 KiB
Go

package full
import (
"bytes"
"context"
"errors"
"fmt"
"github.com/ipfs/go-cid"
"golang.org/x/xerrors"
"github.com/filecoin-project/go-address"
"github.com/filecoin-project/go-state-types/abi"
"github.com/filecoin-project/go-state-types/big"
builtintypes "github.com/filecoin-project/go-state-types/builtin"
"github.com/filecoin-project/go-state-types/builtin/v10/eam"
"github.com/filecoin-project/go-state-types/crypto"
"github.com/filecoin-project/lotus/api"
"github.com/filecoin-project/lotus/build"
"github.com/filecoin-project/lotus/chain/actors"
"github.com/filecoin-project/lotus/chain/store"
"github.com/filecoin-project/lotus/chain/types"
"github.com/filecoin-project/lotus/chain/types/ethtypes"
"github.com/filecoin-project/lotus/chain/vm"
)
func getTipsetByBlockNr(ctx context.Context, chain *store.ChainStore, blkParam string, strict bool) (*types.TipSet, error) {
if blkParam == "earliest" {
return nil, fmt.Errorf("block param \"earliest\" is not supported")
}
head := chain.GetHeaviestTipSet()
switch blkParam {
case "pending":
return head, nil
case "latest":
parent, err := chain.GetTipSetFromKey(ctx, head.Parents())
if err != nil {
return nil, fmt.Errorf("cannot get parent tipset")
}
return parent, nil
default:
var num ethtypes.EthUint64
err := num.UnmarshalJSON([]byte(`"` + blkParam + `"`))
if err != nil {
return nil, fmt.Errorf("cannot parse block number: %v", err)
}
if abi.ChainEpoch(num) > head.Height()-1 {
return nil, fmt.Errorf("requested a future epoch (beyond 'latest')")
}
ts, err := chain.GetTipsetByHeight(ctx, abi.ChainEpoch(num), head, true)
if err != nil {
return nil, fmt.Errorf("cannot get tipset at height: %v", num)
}
if strict && ts.Height() != abi.ChainEpoch(num) {
return nil, ErrNullRound
}
return ts, nil
}
}
func getTipsetByEthBlockNumberOrHash(ctx context.Context, chain *store.ChainStore, blkParam ethtypes.EthBlockNumberOrHash) (*types.TipSet, error) {
head := chain.GetHeaviestTipSet()
predefined := blkParam.PredefinedBlock
if predefined != nil {
if *predefined == "earliest" {
return nil, fmt.Errorf("block param \"earliest\" is not supported")
} else if *predefined == "pending" {
return head, nil
} else if *predefined == "latest" {
parent, err := chain.GetTipSetFromKey(ctx, head.Parents())
if err != nil {
return nil, fmt.Errorf("cannot get parent tipset")
}
return parent, nil
} else {
return nil, fmt.Errorf("unknown predefined block %s", *predefined)
}
}
if blkParam.BlockNumber != nil {
height := abi.ChainEpoch(*blkParam.BlockNumber)
if height > head.Height()-1 {
return nil, fmt.Errorf("requested a future epoch (beyond 'latest')")
}
ts, err := chain.GetTipsetByHeight(ctx, height, head, true)
if err != nil {
return nil, fmt.Errorf("cannot get tipset at height: %v", height)
}
return ts, nil
}
if blkParam.BlockHash != nil {
ts, err := chain.GetTipSetByCid(ctx, blkParam.BlockHash.ToCid())
if err != nil {
return nil, fmt.Errorf("cannot get tipset by hash: %v", err)
}
// verify that the tipset is in the canonical chain
if blkParam.RequireCanonical {
// walk up the current chain (our head) until we reach ts.Height()
walkTs, err := chain.GetTipsetByHeight(ctx, ts.Height(), head, true)
if err != nil {
return nil, fmt.Errorf("cannot get tipset at height: %v", ts.Height())
}
// verify that it equals the expected tipset
if !walkTs.Equals(ts) {
return nil, fmt.Errorf("tipset is not canonical")
}
}
return ts, nil
}
return nil, errors.New("invalid block param")
}
func ethCallToFilecoinMessage(ctx context.Context, tx ethtypes.EthCall) (*types.Message, error) {
var from address.Address
if tx.From == nil || *tx.From == (ethtypes.EthAddress{}) {
// Send from the filecoin "system" address.
var err error
from, err = (ethtypes.EthAddress{}).ToFilecoinAddress()
if err != nil {
return nil, fmt.Errorf("failed to construct the ethereum system address: %w", err)
}
} else {
// The from address must be translatable to an f4 address.
var err error
from, err = tx.From.ToFilecoinAddress()
if err != nil {
return nil, fmt.Errorf("failed to translate sender address (%s): %w", tx.From.String(), err)
}
if p := from.Protocol(); p != address.Delegated {
return nil, fmt.Errorf("expected a class 4 address, got: %d: %w", p, err)
}
}
var params []byte
if len(tx.Data) > 0 {
initcode := abi.CborBytes(tx.Data)
params2, err := actors.SerializeParams(&initcode)
if err != nil {
return nil, fmt.Errorf("failed to serialize params: %w", err)
}
params = params2
}
var to address.Address
var method abi.MethodNum
if tx.To == nil {
// this is a contract creation
to = builtintypes.EthereumAddressManagerActorAddr
method = builtintypes.MethodsEAM.CreateExternal
} else {
addr, err := tx.To.ToFilecoinAddress()
if err != nil {
return nil, xerrors.Errorf("cannot get Filecoin address: %w", err)
}
to = addr
method = builtintypes.MethodsEVM.InvokeContract
}
return &types.Message{
From: from,
To: to,
Value: big.Int(tx.Value),
Method: method,
Params: params,
GasLimit: build.BlockGasLimit,
GasFeeCap: big.Zero(),
GasPremium: big.Zero(),
}, nil
}
func newEthBlockFromFilecoinTipSet(ctx context.Context, ts *types.TipSet, fullTxInfo bool, cs *store.ChainStore, sa StateAPI) (ethtypes.EthBlock, error) {
parentKeyCid, err := ts.Parents().Cid()
if err != nil {
return ethtypes.EthBlock{}, err
}
parentBlkHash, err := ethtypes.EthHashFromCid(parentKeyCid)
if err != nil {
return ethtypes.EthBlock{}, err
}
bn := ethtypes.EthUint64(ts.Height())
blkCid, err := ts.Key().Cid()
if err != nil {
return ethtypes.EthBlock{}, err
}
blkHash, err := ethtypes.EthHashFromCid(blkCid)
if err != nil {
return ethtypes.EthBlock{}, err
}
msgs, rcpts, err := messagesAndReceipts(ctx, ts, cs, sa)
if err != nil {
return ethtypes.EthBlock{}, xerrors.Errorf("failed to retrieve messages and receipts: %w", err)
}
block := ethtypes.NewEthBlock(len(msgs) > 0)
gasUsed := int64(0)
for i, msg := range msgs {
rcpt := rcpts[i]
ti := ethtypes.EthUint64(i)
gasUsed += rcpt.GasUsed
var smsg *types.SignedMessage
switch msg := msg.(type) {
case *types.SignedMessage:
smsg = msg
case *types.Message:
smsg = &types.SignedMessage{
Message: *msg,
Signature: crypto.Signature{
Type: crypto.SigTypeBLS,
},
}
default:
return ethtypes.EthBlock{}, xerrors.Errorf("failed to get signed msg %s: %w", msg.Cid(), err)
}
tx, err := newEthTxFromSignedMessage(ctx, smsg, sa)
if err != nil {
return ethtypes.EthBlock{}, xerrors.Errorf("failed to convert msg to ethTx: %w", err)
}
tx.ChainID = ethtypes.EthUint64(build.Eip155ChainId)
tx.BlockHash = &blkHash
tx.BlockNumber = &bn
tx.TransactionIndex = &ti
if fullTxInfo {
block.Transactions = append(block.Transactions, tx)
} else {
block.Transactions = append(block.Transactions, tx.Hash.String())
}
}
block.Hash = blkHash
block.Number = bn
block.ParentHash = parentBlkHash
block.Timestamp = ethtypes.EthUint64(ts.Blocks()[0].Timestamp)
block.BaseFeePerGas = ethtypes.EthBigInt{Int: ts.Blocks()[0].ParentBaseFee.Int}
block.GasUsed = ethtypes.EthUint64(gasUsed)
return block, nil
}
func messagesAndReceipts(ctx context.Context, ts *types.TipSet, cs *store.ChainStore, sa StateAPI) ([]types.ChainMsg, []types.MessageReceipt, error) {
msgs, err := cs.MessagesForTipset(ctx, ts)
if err != nil {
return nil, nil, xerrors.Errorf("error loading messages for tipset: %v: %w", ts, err)
}
_, rcptRoot, err := sa.StateManager.TipSetState(ctx, ts)
if err != nil {
return nil, nil, xerrors.Errorf("failed to compute state: %w", err)
}
rcpts, err := cs.ReadReceipts(ctx, rcptRoot)
if err != nil {
return nil, nil, xerrors.Errorf("error loading receipts for tipset: %v: %w", ts, err)
}
if len(msgs) != len(rcpts) {
return nil, nil, xerrors.Errorf("receipts and message array lengths didn't match for tipset: %v: %w", ts, err)
}
return msgs, rcpts, nil
}
const errorFunctionSelector = "\x08\xc3\x79\xa0" // Error(string)
const panicFunctionSelector = "\x4e\x48\x7b\x71" // Panic(uint256)
// Eth ABI (solidity) panic codes.
var panicErrorCodes map[uint64]string = map[uint64]string{
0x00: "Panic()",
0x01: "Assert()",
0x11: "ArithmeticOverflow()",
0x12: "DivideByZero()",
0x21: "InvalidEnumVariant()",
0x22: "InvalidStorageArray()",
0x31: "PopEmptyArray()",
0x32: "ArrayIndexOutOfBounds()",
0x41: "OutOfMemory()",
0x51: "CalledUninitializedFunction()",
}
// Parse an ABI encoded revert reason. This reason should be encoded as if it were the parameters to
// an `Error(string)` function call.
//
// See https://docs.soliditylang.org/en/latest/control-structures.html#panic-via-assert-and-error-via-require
func parseEthRevert(ret []byte) string {
if len(ret) == 0 {
return "none"
}
var cbytes abi.CborBytes
if err := cbytes.UnmarshalCBOR(bytes.NewReader(ret)); err != nil {
return "ERROR: revert reason is not cbor encoded bytes"
}
if len(cbytes) == 0 {
return "none"
}
// If it's not long enough to contain an ABI encoded response, return immediately.
if len(cbytes) < 4+32 {
return ethtypes.EthBytes(cbytes).String()
}
switch string(cbytes[:4]) {
case panicFunctionSelector:
cbytes := cbytes[4 : 4+32]
// Read the and check the code.
code, err := ethtypes.EthUint64FromBytes(cbytes)
if err != nil {
// If it's too big, just return the raw value.
codeInt := big.PositiveFromUnsignedBytes(cbytes)
return fmt.Sprintf("Panic(%s)", ethtypes.EthBigInt(codeInt).String())
}
if s, ok := panicErrorCodes[uint64(code)]; ok {
return s
}
return fmt.Sprintf("Panic(0x%x)", code)
case errorFunctionSelector:
cbytes := cbytes[4:]
cbytesLen := ethtypes.EthUint64(len(cbytes))
// Read the and check the offset.
offset, err := ethtypes.EthUint64FromBytes(cbytes[:32])
if err != nil {
break
}
if cbytesLen < offset {
break
}
// Read and check the length.
if cbytesLen-offset < 32 {
break
}
start := offset + 32
length, err := ethtypes.EthUint64FromBytes(cbytes[offset : offset+32])
if err != nil {
break
}
if cbytesLen-start < length {
break
}
// Slice the error message.
return fmt.Sprintf("Error(%s)", cbytes[start:start+length])
}
return ethtypes.EthBytes(cbytes).String()
}
// lookupEthAddress makes its best effort at finding the Ethereum address for a
// Filecoin address. It does the following:
//
// 1. If the supplied address is an f410 address, we return its payload as the EthAddress.
// 2. Otherwise (f0, f1, f2, f3), we look up the actor on the state tree. If it has a delegated address, we return it if it's f410 address.
// 3. Otherwise, we fall back to returning a masked ID Ethereum address. If the supplied address is an f0 address, we
// use that ID to form the masked ID address.
// 4. Otherwise, we fetch the actor's ID from the state tree and form the masked ID with it.
func lookupEthAddress(ctx context.Context, addr address.Address, sa StateAPI) (ethtypes.EthAddress, error) {
// BLOCK A: We are trying to get an actual Ethereum address from an f410 address.
// Attempt to convert directly, if it's an f4 address.
ethAddr, err := ethtypes.EthAddressFromFilecoinAddress(addr)
if err == nil && !ethAddr.IsMaskedID() {
return ethAddr, nil
}
// Lookup on the target actor and try to get an f410 address.
if actor, err := sa.StateGetActor(ctx, addr, types.EmptyTSK); err != nil {
return ethtypes.EthAddress{}, err
} else if actor.Address != nil {
if ethAddr, err := ethtypes.EthAddressFromFilecoinAddress(*actor.Address); err == nil && !ethAddr.IsMaskedID() {
return ethAddr, nil
}
}
// BLOCK B: We gave up on getting an actual Ethereum address and are falling back to a Masked ID address.
// Check if we already have an ID addr, and use it if possible.
if err == nil && ethAddr.IsMaskedID() {
return ethAddr, nil
}
// Otherwise, resolve the ID addr.
idAddr, err := sa.StateLookupID(ctx, addr, types.EmptyTSK)
if err != nil {
return ethtypes.EthAddress{}, err
}
return ethtypes.EthAddressFromFilecoinAddress(idAddr)
}
func parseEthTopics(topics ethtypes.EthTopicSpec) (map[string][][]byte, error) {
keys := map[string][][]byte{}
for idx, vals := range topics {
if len(vals) == 0 {
continue
}
// Ethereum topics are emitted using `LOG{0..4}` opcodes resulting in topics1..4
key := fmt.Sprintf("t%d", idx+1)
for _, v := range vals {
v := v // copy the ethhash to avoid repeatedly referencing the same one.
keys[key] = append(keys[key], v[:])
}
}
return keys, nil
}
func ethTxHashFromMessageCid(ctx context.Context, c cid.Cid, sa StateAPI) (ethtypes.EthHash, error) {
smsg, err := sa.Chain.GetSignedMessage(ctx, c)
if err == nil {
// This is an Eth Tx, Secp message, Or BLS message in the mpool
return ethTxHashFromSignedMessage(ctx, smsg, sa)
}
_, err = sa.Chain.GetMessage(ctx, c)
if err == nil {
// This is a BLS message
return ethtypes.EthHashFromCid(c)
}
return ethtypes.EmptyEthHash, nil
}
func ethTxHashFromSignedMessage(ctx context.Context, smsg *types.SignedMessage, sa StateAPI) (ethtypes.EthHash, error) {
if smsg.Signature.Type == crypto.SigTypeDelegated {
ethTx, err := newEthTxFromSignedMessage(ctx, smsg, sa)
if err != nil {
return ethtypes.EmptyEthHash, err
}
return ethTx.Hash, nil
} else if smsg.Signature.Type == crypto.SigTypeSecp256k1 {
return ethtypes.EthHashFromCid(smsg.Cid())
} else { // BLS message
return ethtypes.EthHashFromCid(smsg.Message.Cid())
}
}
func newEthTxFromSignedMessage(ctx context.Context, smsg *types.SignedMessage, sa StateAPI) (ethtypes.EthTx, error) {
var tx ethtypes.EthTx
var err error
// This is an eth tx
if smsg.Signature.Type == crypto.SigTypeDelegated {
tx, err = ethtypes.EthTxFromSignedEthMessage(smsg)
if err != nil {
return ethtypes.EthTx{}, xerrors.Errorf("failed to convert from signed message: %w", err)
}
tx.Hash, err = tx.TxHash()
if err != nil {
return ethtypes.EthTx{}, xerrors.Errorf("failed to calculate hash for ethTx: %w", err)
}
fromAddr, err := lookupEthAddress(ctx, smsg.Message.From, sa)
if err != nil {
return ethtypes.EthTx{}, xerrors.Errorf("failed to resolve Ethereum address: %w", err)
}
tx.From = fromAddr
} else if smsg.Signature.Type == crypto.SigTypeSecp256k1 { // Secp Filecoin Message
tx = ethTxFromNativeMessage(ctx, smsg.VMMessage(), sa)
tx.Hash, err = ethtypes.EthHashFromCid(smsg.Cid())
if err != nil {
return tx, err
}
} else { // BLS Filecoin message
tx = ethTxFromNativeMessage(ctx, smsg.VMMessage(), sa)
tx.Hash, err = ethtypes.EthHashFromCid(smsg.Message.Cid())
if err != nil {
return tx, err
}
}
return tx, nil
}
// ethTxFromNativeMessage does NOT populate:
// - BlockHash
// - BlockNumber
// - TransactionIndex
// - Hash
func ethTxFromNativeMessage(ctx context.Context, msg *types.Message, sa StateAPI) ethtypes.EthTx {
// We don't care if we error here, conversion is best effort for non-eth transactions
from, _ := lookupEthAddress(ctx, msg.From, sa)
to, _ := lookupEthAddress(ctx, msg.To, sa)
return ethtypes.EthTx{
To: &to,
From: from,
Nonce: ethtypes.EthUint64(msg.Nonce),
ChainID: ethtypes.EthUint64(build.Eip155ChainId),
Value: ethtypes.EthBigInt(msg.Value),
Type: ethtypes.Eip1559TxType,
Gas: ethtypes.EthUint64(msg.GasLimit),
MaxFeePerGas: ethtypes.EthBigInt(msg.GasFeeCap),
MaxPriorityFeePerGas: ethtypes.EthBigInt(msg.GasPremium),
AccessList: []ethtypes.EthHash{},
}
}
func getSignedMessage(ctx context.Context, cs *store.ChainStore, msgCid cid.Cid) (*types.SignedMessage, error) {
smsg, err := cs.GetSignedMessage(ctx, msgCid)
if err != nil {
// We couldn't find the signed message, it might be a BLS message, so search for a regular message.
msg, err := cs.GetMessage(ctx, msgCid)
if err != nil {
return nil, xerrors.Errorf("failed to find msg %s: %w", msgCid, err)
}
smsg = &types.SignedMessage{
Message: *msg,
Signature: crypto.Signature{
Type: crypto.SigTypeBLS,
},
}
}
return smsg, nil
}
// newEthTxFromMessageLookup creates an ethereum transaction from filecoin message lookup. If a negative txIdx is passed
// into the function, it looks up the transaction index of the message in the tipset, otherwise it uses the txIdx passed into the
// function
func newEthTxFromMessageLookup(ctx context.Context, msgLookup *api.MsgLookup, txIdx int, cs *store.ChainStore, sa StateAPI) (ethtypes.EthTx, error) {
ts, err := cs.LoadTipSet(ctx, msgLookup.TipSet)
if err != nil {
return ethtypes.EthTx{}, err
}
// This tx is located in the parent tipset
parentTs, err := cs.LoadTipSet(ctx, ts.Parents())
if err != nil {
return ethtypes.EthTx{}, err
}
parentTsCid, err := parentTs.Key().Cid()
if err != nil {
return ethtypes.EthTx{}, err
}
// lookup the transactionIndex
if txIdx < 0 {
msgs, err := cs.MessagesForTipset(ctx, parentTs)
if err != nil {
return ethtypes.EthTx{}, err
}
for i, msg := range msgs {
if msg.Cid() == msgLookup.Message {
txIdx = i
break
}
}
if txIdx < 0 {
return ethtypes.EthTx{}, fmt.Errorf("cannot find the msg in the tipset")
}
}
blkHash, err := ethtypes.EthHashFromCid(parentTsCid)
if err != nil {
return ethtypes.EthTx{}, err
}
smsg, err := getSignedMessage(ctx, cs, msgLookup.Message)
if err != nil {
return ethtypes.EthTx{}, xerrors.Errorf("failed to get signed msg: %w", err)
}
tx, err := newEthTxFromSignedMessage(ctx, smsg, sa)
if err != nil {
return ethtypes.EthTx{}, err
}
var (
bn = ethtypes.EthUint64(parentTs.Height())
ti = ethtypes.EthUint64(txIdx)
)
tx.ChainID = ethtypes.EthUint64(build.Eip155ChainId)
tx.BlockHash = &blkHash
tx.BlockNumber = &bn
tx.TransactionIndex = &ti
return tx, nil
}
func newEthTxReceipt(ctx context.Context, tx ethtypes.EthTx, lookup *api.MsgLookup, events []types.Event, cs *store.ChainStore, sa StateAPI) (api.EthTxReceipt, error) {
var (
transactionIndex ethtypes.EthUint64
blockHash ethtypes.EthHash
blockNumber ethtypes.EthUint64
)
if tx.TransactionIndex != nil {
transactionIndex = *tx.TransactionIndex
}
if tx.BlockHash != nil {
blockHash = *tx.BlockHash
}
if tx.BlockNumber != nil {
blockNumber = *tx.BlockNumber
}
receipt := api.EthTxReceipt{
TransactionHash: tx.Hash,
From: tx.From,
To: tx.To,
TransactionIndex: transactionIndex,
BlockHash: blockHash,
BlockNumber: blockNumber,
Type: ethtypes.EthUint64(2),
Logs: []ethtypes.EthLog{}, // empty log array is compulsory when no logs, or libraries like ethers.js break
LogsBloom: ethtypes.EmptyEthBloom[:],
}
if lookup.Receipt.ExitCode.IsSuccess() {
receipt.Status = 1
} else {
receipt.Status = 0
}
receipt.GasUsed = ethtypes.EthUint64(lookup.Receipt.GasUsed)
// TODO: handle CumulativeGasUsed
receipt.CumulativeGasUsed = ethtypes.EmptyEthInt
// TODO: avoid loading the tipset twice (once here, once when we convert the message to a txn)
ts, err := cs.GetTipSetFromKey(ctx, lookup.TipSet)
if err != nil {
return api.EthTxReceipt{}, xerrors.Errorf("failed to lookup tipset %s when constructing the eth txn receipt: %w", lookup.TipSet, err)
}
baseFee := ts.Blocks()[0].ParentBaseFee
gasOutputs := vm.ComputeGasOutputs(lookup.Receipt.GasUsed, int64(tx.Gas), baseFee, big.Int(tx.MaxFeePerGas), big.Int(tx.MaxPriorityFeePerGas), true)
totalSpent := big.Sum(gasOutputs.BaseFeeBurn, gasOutputs.MinerTip, gasOutputs.OverEstimationBurn)
effectiveGasPrice := big.Zero()
if lookup.Receipt.GasUsed > 0 {
effectiveGasPrice = big.Div(totalSpent, big.NewInt(lookup.Receipt.GasUsed))
}
receipt.EffectiveGasPrice = ethtypes.EthBigInt(effectiveGasPrice)
if receipt.To == nil && lookup.Receipt.ExitCode.IsSuccess() {
// Create and Create2 return the same things.
var ret eam.CreateExternalReturn
if err := ret.UnmarshalCBOR(bytes.NewReader(lookup.Receipt.Return)); err != nil {
return api.EthTxReceipt{}, xerrors.Errorf("failed to parse contract creation result: %w", err)
}
addr := ethtypes.EthAddress(ret.EthAddress)
receipt.ContractAddress = &addr
}
if len(events) > 0 {
receipt.Logs = make([]ethtypes.EthLog, 0, len(events))
for i, evt := range events {
l := ethtypes.EthLog{
Removed: false,
LogIndex: ethtypes.EthUint64(i),
TransactionHash: tx.Hash,
TransactionIndex: transactionIndex,
BlockHash: blockHash,
BlockNumber: blockNumber,
}
data, topics, ok := ethLogFromEvent(evt.Entries)
if !ok {
// not an eth event.
continue
}
for _, topic := range topics {
ethtypes.EthBloomSet(receipt.LogsBloom, topic[:])
}
l.Data = data
l.Topics = topics
addr, err := address.NewIDAddress(uint64(evt.Emitter))
if err != nil {
return api.EthTxReceipt{}, xerrors.Errorf("failed to create ID address: %w", err)
}
l.Address, err = lookupEthAddress(ctx, addr, sa)
if err != nil {
return api.EthTxReceipt{}, xerrors.Errorf("failed to resolve Ethereum address: %w", err)
}
ethtypes.EthBloomSet(receipt.LogsBloom, l.Address[:])
receipt.Logs = append(receipt.Logs, l)
}
}
return receipt, nil
}