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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,3 +1,61 @@ | ||
| package keeper | ||
|
|
||
| import ( | ||
| "errors" | ||
|
|
||
| "github.com/tendermint/tendermint/libs/log" | ||
|
|
||
| "github.com/Finschia/finschia-sdk/codec" | ||
| sdk "github.com/Finschia/finschia-sdk/types" | ||
| "github.com/Finschia/finschia-sdk/x/fbridge/types" | ||
| "strings" | ||
| ) | ||
|
|
||
| type Keeper struct { | ||
| storeKey sdk.StoreKey | ||
| cdc codec.BinaryCodec | ||
| authKeeper types.AccountKeeper | ||
| bankKeeper types.BankKeeper | ||
|
|
||
| // the target denom for the bridge | ||
| targetDenom string | ||
|
|
||
| // the authority address that can execute privileged operations only if the guardian group is not set | ||
| // - UpdateParams | ||
| // - SuggestRole | ||
| authority string | ||
| } | ||
|
|
||
| func NewKeeper( | ||
| cdc codec.BinaryCodec, | ||
| key sdk.StoreKey, | ||
| authKeeper types.AccountKeeper, | ||
| bankKeeper types.BankKeeper, | ||
| targetDenom string, | ||
| authority string, | ||
| ) Keeper { | ||
| if addr := authKeeper.GetModuleAddress(types.ModuleName); addr == nil { | ||
| panic(errors.New("fbridge module account has not been set")) | ||
| } | ||
|
|
||
| if strings.TrimSpace(authority) == "" { | ||
| panic(errors.New("authority address cannot be empty")) | ||
| } | ||
|
|
||
| return Keeper{ | ||
| storeKey: key, | ||
| cdc: cdc, | ||
| authKeeper: authKeeper, | ||
| bankKeeper: bankKeeper, | ||
| targetDenom: targetDenom, | ||
| authority: authority, | ||
| } | ||
| } | ||
|
|
||
| func (k Keeper) Logger(ctx sdk.Context) log.Logger { | ||
| return ctx.Logger().With("module", "x/"+types.ModuleName) | ||
| } | ||
|
|
||
| func (k Keeper) GetAuthority() string { | ||
| return k.authority | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| package keeper | ||
|
|
||
| import ( | ||
| "encoding/binary" | ||
| "encoding/hex" | ||
| "errors" | ||
| "fmt" | ||
| "regexp" | ||
| "strconv" | ||
| "strings" | ||
|
|
||
| "golang.org/x/crypto/sha3" | ||
|
|
||
| sdk "github.com/Finschia/finschia-sdk/types" | ||
| "github.com/Finschia/finschia-sdk/x/fbridge/types" | ||
| ) | ||
|
|
||
| func (k Keeper) handleBridgeTransfer(ctx sdk.Context, sender sdk.AccAddress, amount sdk.Int) (uint64, error) { | ||
| token := sdk.Coins{sdk.Coin{Denom: k.targetDenom, Amount: amount}} | ||
| if err := k.bankKeeper.SendCoinsFromAccountToModule(ctx, sender, types.ModuleName, token); err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| if err := k.bankKeeper.BurnCoins(ctx, types.ModuleName, token); err != nil { | ||
| panic(fmt.Errorf("cannot burn coins after a successful send to a module account: %v", err)) | ||
| } | ||
|
|
||
| nextSeq := k.GetNextSequence(ctx) + 1 | ||
| k.setNextSequence(ctx, nextSeq) | ||
|
|
||
| return nextSeq, nil | ||
| } | ||
|
|
||
| func (k Keeper) GetNextSequence(ctx sdk.Context) uint64 { | ||
| store := ctx.KVStore(k.storeKey) | ||
| bz := store.Get(types.KeyNextSeqSend) | ||
| if len(bz) == 0 { | ||
| panic(errors.New("sending next sequence should have been set")) | ||
| } | ||
|
|
||
| return binary.BigEndian.Uint64(bz) | ||
| } | ||
|
|
||
| func (k Keeper) setNextSequence(ctx sdk.Context, seq uint64) { | ||
| store := ctx.KVStore(k.storeKey) | ||
| bz := make([]byte, 8) | ||
| binary.BigEndian.PutUint64(bz, seq) | ||
| store.Set(types.KeyNextSeqSend, bz) | ||
| } | ||
|
|
||
| func IsValidEthereumAddress(address string) bool { | ||
| matched, err := regexp.MatchString(`^0x[a-fA-F0-9]{40}$`, address) | ||
| if err != nil || !matched { | ||
| return false | ||
| } | ||
|
|
||
| address = address[2:] | ||
| addressLower := strings.ToLower(address) | ||
|
|
||
| hasher := sha3.NewLegacyKeccak256() | ||
| hasher.Write([]byte(addressLower)) | ||
| addressHash := hex.EncodeToString(hasher.Sum(nil)) | ||
|
|
||
| checksumAddress := "" | ||
| for i := 0; i < len(addressLower); i++ { | ||
| c, err := strconv.ParseUint(string(addressHash[i]), 16, 4) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| if c < 8 { | ||
| checksumAddress += string(addressLower[i]) | ||
| } else { | ||
| checksumAddress += strings.ToUpper(string(addressLower[i])) | ||
| } | ||
| } | ||
|
|
||
| return address == checksumAddress | ||
| } | ||
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