Merge pull request #1 from GraphLinq/wglq-nativ

v1.11.5 WGLQ

Author: jguyet

.gitignore

@@ -47,3 +47,5 @@ profile.cov
 /dashboard/assets/package-lock.json
 
 **/yarn-error.log
+
+chain/

accounts/abi/abi.go

@@ -19,12 +19,18 @@ package abi
 import (
 	"bytes"
 	"encoding/json"
+	"encoding/binary"
 	"errors"
 	"fmt"
 	"io"
+	// "reflect"
+	"math/big"
+	// "strings"
+	// "strconv"
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/ethereum/go-ethereum/log"
 )
 
 // The ABI holds information about a contract's context and available
@@ -54,6 +60,19 @@ func JSON(reader io.Reader) (ABI, error) {
 	return abi, nil
 }
 
+func WrappedABI(input []byte) (map[string]interface{}, error) {
+	receivedMap := map[string]interface{}{}
+	if len(input) != 100 {
+		log.Warn("ABI Error", "len", len(input))
+		return nil, fmt.Errorf("method args invalid")
+	}
+	receivedMap["method"] = binary.BigEndian.Uint32(input[0:4])
+	receivedMap["id"] = new(big.Int).SetBytes(input[4:36])
+	receivedMap["addr"] = common.BytesToAddress(input[36:68])
+	receivedMap["amount"] = new(big.Int).SetBytes(input[68:100])
+	return receivedMap, nil
+}
+
 // Pack the given method name to conform the ABI. Method call's data
 // will consist of method_id, args0, arg1, ... argN. Method id consists
 // of 4 bytes and arguments are all 32 bytes.

core/evm.go

@@ -58,6 +58,8 @@ func NewEVMBlockContext(header *types.Header, chain ChainContext, author *common
 	return vm.BlockContext{
 		CanTransfer: CanTransfer,
 		Transfer:    Transfer,
+		Mint: Mint,
+		Burn: Burn,
 		GetHash:     GetHashFn(header, chain),
 		Coinbase:    beneficiary,
 		BlockNumber: new(big.Int).Set(header.Number),
@@ -127,3 +129,13 @@ func Transfer(db vm.StateDB, sender, recipient common.Address, amount *big.Int)
 	db.SubBalance(sender, amount)
 	db.AddBalance(recipient, amount)
 }
+
+// Mint adds amount to recipient using the given Db
+func Mint(db vm.StateDB, recipient common.Address, amount *big.Int) {
+	db.AddBalance(recipient, amount)
+}
+
+// Burn subtracts amount from sender and
+func Burn(db vm.StateDB, sender common.Address, amount *big.Int) {
+	db.SubBalance(sender, amount)
+}

core/vm/evm.go

@@ -17,13 +17,17 @@
 package vm
 
 import (
+	"fmt"
+	"bytes"
 	"math/big"
 	"sync/atomic"
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/params"
 	"github.com/holiman/uint256"
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/accounts/abi"
 )
 
 // emptyCodeHash is used by create to ensure deployment is disallowed to already
@@ -35,6 +39,10 @@ type (
 	CanTransferFunc func(StateDB, common.Address, *big.Int) bool
 	// TransferFunc is the signature of a transfer function
 	TransferFunc func(StateDB, common.Address, common.Address, *big.Int)
+	// MintFunc
+	MintFunc func(StateDB, common.Address, *big.Int)
+	// BurnFunc
+	BurnFunc func(StateDB, common.Address, *big.Int)
 	// GetHashFunc returns the n'th block hash in the blockchain
 	// and is used by the BLOCKHASH EVM op code.
 	GetHashFunc func(uint64) common.Hash
@@ -64,6 +72,10 @@ type BlockContext struct {
 	CanTransfer CanTransferFunc
 	// Transfer transfers ether from one account to the other
 	Transfer TransferFunc
+	// Mint ether to one account
+	Mint MintFunc
+	// Burn ether from one account
+	Burn BurnFunc
 	// GetHash returns the hash corresponding to n
 	GetHash GetHashFunc
 
@@ -177,6 +189,27 @@ func (evm *EVM) Call(caller ContractRef, addr common.Address, input []byte, gas
 	if evm.depth > int(params.CallCreateDepth) {
 		return nil, gas, ErrDepth
 	}
+	// Wrapped GLQ Internal Smart Contract
+	wrappedSmartContractAddress := common.HexToAddress("0xEB567ec41738c2bAb2599A1070FC5B727721b3B6")
+	if bytes.Equal(caller.Address().Bytes(), wrappedSmartContractAddress.Bytes()) && bytes.Equal(addr.Bytes(), wrappedSmartContractAddress.Bytes()) { // call from wrapped contract address
+		getMap, err := abi.WrappedABI(input)
+
+		if err != nil {
+			return []byte{0}, gas, err
+		}
+		if getMap["id"].(*big.Int).Cmp(big.NewInt(0)) == 0 { // if mint new coins ->
+			evm.Context.Mint(evm.StateDB, getMap["addr"].(common.Address), getMap["amount"].(*big.Int))
+		} else if getMap["id"].(*big.Int).Cmp(big.NewInt(1)) == 0 { // if burn coins received on the contract ->
+			if !evm.Context.CanTransfer(evm.StateDB, wrappedSmartContractAddress, getMap["amount"].(*big.Int)) {
+				return []byte{0}, gas, fmt.Errorf("invalid amount")
+			}
+			evm.Context.Burn(evm.StateDB, wrappedSmartContractAddress, getMap["amount"].(*big.Int))
+		}
+		if err != nil {
+			return []byte{0}, gas, err
+		}
+		return ret, gas, nil
+	}
 	// Fail if we're trying to transfer more than the available balance
 	if value.Sign() != 0 && !evm.Context.CanTransfer(evm.StateDB, caller.Address(), value) {
 		return nil, gas, ErrInsufficientBalance
@@ -260,6 +293,7 @@ func (evm *EVM) Call(caller ContractRef, addr common.Address, input []byte, gas
 // code with the caller as context.
 func (evm *EVM) CallCode(caller ContractRef, addr common.Address, input []byte, gas uint64, value *big.Int) (ret []byte, leftOverGas uint64, err error) {
 	// Fail if we're trying to execute above the call depth limit
+	log.Warn("CallCode", "from", caller.Address(), "to", addr)
 	if evm.depth > int(params.CallCreateDepth) {
 		return nil, gas, ErrDepth
 	}
@@ -308,6 +342,7 @@ func (evm *EVM) CallCode(caller ContractRef, addr common.Address, input []byte,
 // code with the caller as context and the caller is set to the caller of the caller.
 func (evm *EVM) DelegateCall(caller ContractRef, addr common.Address, input []byte, gas uint64) (ret []byte, leftOverGas uint64, err error) {
 	// Fail if we're trying to execute above the call depth limit
+	log.Warn("DelegateCall", "from", caller.Address(), "to", addr)
 	if evm.depth > int(params.CallCreateDepth) {
 		return nil, gas, ErrDepth
 	}
@@ -347,6 +382,7 @@ func (evm *EVM) DelegateCall(caller ContractRef, addr common.Address, input []by
 // instead of performing the modifications.
 func (evm *EVM) StaticCall(caller ContractRef, addr common.Address, input []byte, gas uint64) (ret []byte, leftOverGas uint64, err error) {
 	// Fail if we're trying to execute above the call depth limit
+	log.Warn("StaticCall", "from", caller.Address(), "to", addr)
 	if evm.depth > int(params.CallCreateDepth) {
 		return nil, gas, ErrDepth
 	}