status-go/services/communitytokens/manager.go

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package communitytokens
import (
"context"
"fmt"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/math"
"github.com/ethereum/go-ethereum/signer/core/apitypes"
"github.com/status-im/status-go/contracts/community-tokens/assets"
"github.com/status-im/status-go/contracts/community-tokens/collectibles"
communitytokendeployer "github.com/status-im/status-go/contracts/community-tokens/deployer"
"github.com/status-im/status-go/eth-node/crypto"
"github.com/status-im/status-go/eth-node/types"
"github.com/status-im/status-go/rpc"
"github.com/status-im/status-go/services/wallet/bigint"
)
type Manager struct {
rpcClient *rpc.Client
}
func NewManager(rpcClient *rpc.Client) *Manager {
return &Manager{
rpcClient: rpcClient,
}
}
func (m *Manager) NewCollectiblesInstance(chainID uint64, contractAddress string) (*collectibles.Collectibles, error) {
backend, err := m.rpcClient.EthClient(chainID)
if err != nil {
return nil, err
}
return collectibles.NewCollectibles(common.HexToAddress(contractAddress), backend)
}
func (m *Manager) NewCommunityTokenDeployerInstance(chainID uint64) (*communitytokendeployer.CommunityTokenDeployer, error) {
backend, err := m.rpcClient.EthClient(chainID)
if err != nil {
return nil, err
}
deployerAddr, err := communitytokendeployer.ContractAddress(chainID)
if err != nil {
return nil, err
}
return communitytokendeployer.NewCommunityTokenDeployer(deployerAddr, backend)
}
func (m *Manager) GetCollectiblesContractInstance(chainID uint64, contractAddress string) (*collectibles.Collectibles, error) {
contractInst, err := m.NewCollectiblesInstance(chainID, contractAddress)
if err != nil {
return nil, err
}
return contractInst, nil
}
func (m *Manager) NewAssetsInstance(chainID uint64, contractAddress string) (*assets.Assets, error) {
backend, err := m.rpcClient.EthClient(chainID)
if err != nil {
return nil, err
}
return assets.NewAssets(common.HexToAddress(contractAddress), backend)
}
func (m *Manager) GetAssetContractInstance(chainID uint64, contractAddress string) (*assets.Assets, error) {
contractInst, err := m.NewAssetsInstance(chainID, contractAddress)
if err != nil {
return nil, err
}
return contractInst, nil
}
func (m *Manager) GetCollectibleContractData(chainID uint64, contractAddress string) (*CollectibleContractData, error) {
callOpts := &bind.CallOpts{Context: context.Background(), Pending: false}
contract, err := m.GetCollectiblesContractInstance(chainID, contractAddress)
if err != nil {
return nil, err
}
totalSupply, err := contract.TotalSupply(callOpts)
if err != nil {
return nil, err
}
transferable, err := contract.Transferable(callOpts)
if err != nil {
return nil, err
}
remoteBurnable, err := contract.RemoteBurnable(callOpts)
if err != nil {
return nil, err
}
return &CollectibleContractData{
TotalSupply: &bigint.BigInt{Int: totalSupply},
Transferable: transferable,
RemoteBurnable: remoteBurnable,
InfiniteSupply: GetInfiniteSupply().Cmp(totalSupply) == 0,
}, nil
}
func (m *Manager) GetAssetContractData(chainID uint64, contractAddress string) (*AssetContractData, error) {
callOpts := &bind.CallOpts{Context: context.Background(), Pending: false}
contract, err := m.GetAssetContractInstance(chainID, contractAddress)
if err != nil {
return nil, err
}
totalSupply, err := contract.TotalSupply(callOpts)
if err != nil {
return nil, err
}
return &AssetContractData{
TotalSupply: &bigint.BigInt{Int: totalSupply},
InfiniteSupply: GetInfiniteSupply().Cmp(totalSupply) == 0,
}, nil
}
func convert33BytesPubKeyToEthAddress(pubKey string) (common.Address, error) {
decoded, err := types.DecodeHex(pubKey)
if err != nil {
return common.Address{}, err
}
communityPubKey, err := crypto.DecompressPubkey(decoded)
if err != nil {
return common.Address{}, err
}
return common.Address(crypto.PubkeyToAddress(*communityPubKey)), nil
}
// Simpler version of hashing typed structured data alternative to typedStructuredDataHash. Keeping this for reference.
func customTypedStructuredDataHash(domainSeparator []byte, signatureTypedHash []byte, signer string, deployer string) types.Hash {
// every field should be 32 bytes, eth address is 20 bytes so padding should be added
emptyOffset := [12]byte{}
hashedEncoded := crypto.Keccak256Hash(signatureTypedHash, emptyOffset[:], common.HexToAddress(signer).Bytes(),
emptyOffset[:], common.HexToAddress(deployer).Bytes())
rawData := []byte(fmt.Sprintf("\x19\x01%s%s", domainSeparator, hashedEncoded.Bytes()))
return crypto.Keccak256Hash(rawData)
}
// Returns a typed structured hash according to https://eips.ethereum.org/EIPS/eip-712
// Domain separator from smart contract is used.
func typedStructuredDataHash(domainSeparator []byte, signer string, addressFrom string, deployerContractAddress string, chainID uint64) (types.Hash, error) {
myTypedData := apitypes.TypedData{
Types: apitypes.Types{
"Deploy": []apitypes.Type{
{Name: "signer", Type: "address"},
{Name: "deployer", Type: "address"},
},
"EIP712Domain": []apitypes.Type{
{Name: "name", Type: "string"},
{Name: "version", Type: "string"},
{Name: "chainId", Type: "uint256"},
{Name: "verifyingContract", Type: "address"},
},
},
PrimaryType: "Deploy",
// Domain field should be here to keep correct structure but
// domainSeparator from smart contract is used.
Domain: apitypes.TypedDataDomain{
Name: "CommunityTokenDeployer", // name from Deployer smart contract
Version: "1", // version from Deployer smart contract
ChainId: math.NewHexOrDecimal256(int64(chainID)),
VerifyingContract: deployerContractAddress,
},
Message: apitypes.TypedDataMessage{
"signer": signer,
"deployer": addressFrom,
},
}
typedDataHash, err := myTypedData.HashStruct(myTypedData.PrimaryType, myTypedData.Message)
if err != nil {
return types.Hash{}, err
}
rawData := []byte(fmt.Sprintf("\x19\x01%s%s", domainSeparator, string(typedDataHash)))
return crypto.Keccak256Hash(rawData), nil
}
// Creates
func (m *Manager) DeploymentSignatureDigest(chainID uint64, addressFrom string, communityID string) ([]byte, error) {
callOpts := &bind.CallOpts{Pending: false}
communityEthAddr, err := convert33BytesPubKeyToEthAddress(communityID)
if err != nil {
return nil, err
}
deployerAddr, err := communitytokendeployer.ContractAddress(chainID)
if err != nil {
return nil, err
}
deployerContractInst, err := m.NewCommunityTokenDeployerInstance(chainID)
if err != nil {
return nil, err
}
domainSeparator, err := deployerContractInst.DOMAINSEPARATOR(callOpts)
if err != nil {
return nil, err
}
structedHash, err := typedStructuredDataHash(domainSeparator[:], communityEthAddr.Hex(), addressFrom, deployerAddr.Hex(), chainID)
if err != nil {
return nil, err
}
return structedHash.Bytes(), nil
}