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Dreamer
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,133 @@ | ||
| package keeper | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "math/big" | ||
|
|
||
| "github.com/ethereum/go-ethereum/common" | ||
| "github.com/ethereum/go-ethereum/core/vm" | ||
|
|
||
| sdk "github.com/cosmos/cosmos-sdk/types" | ||
|
|
||
| "github.com/bianjieai/iritamod/modules/opb/types" | ||
| ) | ||
|
|
||
| type EVMTransferCreator struct { | ||
| opbKeeper Keeper | ||
| tokenKeeper types.TokenKeeper | ||
| evmKeeper types.EVMKeeper | ||
| permKeeper types.PermKeeper | ||
| } | ||
|
|
||
| func (k Keeper) NewEVMTransferCreator( | ||
| evmKeeper types.EVMKeeper, | ||
| permKeeper types.PermKeeper, | ||
| ) *EVMTransferCreator { | ||
| return &EVMTransferCreator{ | ||
| opbKeeper: k, | ||
| tokenKeeper: k.tokenKeeper, | ||
| evmKeeper: evmKeeper, | ||
| permKeeper: permKeeper, | ||
| } | ||
| } | ||
|
|
||
| func (ov *EVMTransferCreator) CanTransfer(ctx sdk.Context) vm.CanTransferFunc { | ||
| return func(db vm.StateDB, userAddr common.Address, amount *big.Int) bool { | ||
| userCosmosAddr := sdk.AccAddress(userAddr.Bytes()) | ||
|
|
||
| // get opb params | ||
| evmDenom := ov.evmKeeper.GetBaseDenom(ctx) | ||
| restrictionEnabled := !ov.opbKeeper.UnrestrictedTokenTransfer(ctx) | ||
|
|
||
| // check only if the transfer restriction is enabled | ||
| if restrictionEnabled { | ||
| owner, err := ov.getOwner(ctx, evmDenom) | ||
| if err != nil { | ||
| return false | ||
| } | ||
| if ov.hasPlatformUserPerm(ctx, userCosmosAddr) { | ||
| return false | ||
| } | ||
| if userCosmosAddr.String() != owner { | ||
| return false | ||
| } | ||
| } | ||
|
|
||
| return db.GetBalance(userAddr).Cmp(amount) >= 0 | ||
| } | ||
| } | ||
|
|
||
| func (ov *EVMTransferCreator) Transfer(ctx sdk.Context) vm.TransferFunc { | ||
| return func(db vm.StateDB, sender, recipient common.Address, amount *big.Int) { | ||
| senderCosmosAddr := sdk.AccAddress(sender.Bytes()) | ||
| recipientCosmosAddr := sdk.AccAddress(recipient.Bytes()) | ||
|
|
||
| evmDenom := ov.evmKeeper.GetBaseDenom(ctx) | ||
| restrictionEnabled := !ov.opbKeeper.UnrestrictedTokenTransfer(ctx) | ||
| // check only if the transfer restriction is enabled | ||
| if restrictionEnabled { | ||
| owner, err := ov.getOwner(ctx, evmDenom) | ||
| if err != nil { | ||
| //ov.logger.Error("unauthorized operation", "err_msg", err.Error()) | ||
| ov.opbKeeper.Logger(ctx).Error( | ||
| "unauthorized operation", | ||
| "err_msg", err.Error(), | ||
| "amount", amount.Int64(), | ||
| ) | ||
| return | ||
| } | ||
| if senderCosmosAddr.String() != owner && recipientCosmosAddr.String() != owner { | ||
| errMsg := fmt.Sprintf( | ||
| "either the sender or recipient must be the owner %s for token %s", | ||
| owner, | ||
| evmDenom, | ||
| ) | ||
| //ov.logger.Error("unauthorized operation", "err_msg", errMsg) | ||
| ov.opbKeeper.Logger(ctx).Error( | ||
| "unauthorized operation", | ||
| "err_msg", errMsg, | ||
| "amount", amount.Int64(), | ||
| ) | ||
| return | ||
| } | ||
| } | ||
| // go-ethereum | ||
| db.SubBalance(sender, amount) | ||
| db.AddBalance(recipient, amount) | ||
| } | ||
| } | ||
|
|
||
| func (ov *EVMTransferCreator) getOwner(ctx sdk.Context, denom string) (owner string, err error) { | ||
| baseTokenDenom := ov.opbKeeper.BaseTokenDenom(ctx) | ||
|
|
||
| if denom == baseTokenDenom { | ||
| owner = ov.opbKeeper.BaseTokenManager(ctx) | ||
| } else { | ||
| ownerAddr, err := ov.tokenKeeper.GetOwner(ctx, denom) | ||
| if err == nil { | ||
| owner = ownerAddr.String() | ||
| } | ||
| } | ||
| return | ||
| } | ||
|
|
||
| // hasPlatformUserPermFromArr determine whether the account is a platform user from addresses | ||
| func (ov *EVMTransferCreator) hasPlatformUserPermFromArr(ctx sdk.Context, addresses []string) bool { | ||
| for _, addr := range addresses { | ||
| fromAddress, err := sdk.AccAddressFromBech32(addr) | ||
| if err != nil { | ||
| return false | ||
| } | ||
| if !ov.hasPlatformUserPerm(ctx, fromAddress) { | ||
| return false | ||
| } | ||
| } | ||
|
|
||
| return true | ||
| } | ||
|
|
||
| // hasPlatformUserPerm determine whether the account is a platform user | ||
| func (ov *EVMTransferCreator) hasPlatformUserPerm(ctx sdk.Context, address sdk.AccAddress) bool { | ||
| return ov.permKeeper.IsRootAdmin(ctx, address) || ov.permKeeper.IsBaseM1Admin(ctx, address) || | ||
| ov.permKeeper.IsPlatformUser(ctx, address) | ||
| } |
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