keeper

Documentation

Index

• func NewQuerier(k Keeper) sdk.Querier
• type Keeper
  • func NewKeeper(cdc codec.BinaryMarshaler, key sdk.StoreKey, paramSpace params.Subspace, ...) Keeper
  • func (k Keeper) AuthenticateCapability(ctx sdk.Context, cap *capabilitytypes.Capability, name string) bool
  • func (k Keeper) BindPort(ctx sdk.Context, portID string) error
  • func (k Keeper) ClaimCapability(ctx sdk.Context, cap *capabilitytypes.Capability, name string) error
  • func (k Keeper) DenomPathFromHash(ctx sdk.Context, denom string) (string, error)
  • func (q Keeper) DenomTraces(ctx sdk.Context, req *types.QueryDenomTracesRequest) (*types.QueryDenomTracesResponse, error)
  • func (k Keeper) GetDenomTrace(ctx sdk.Context, denomTraceHash tmbytes.HexBytes) (types.DenomTrace, bool)
  • func (k Keeper) GetParams(ctx sdk.Context) (params types.Params)
  • func (k Keeper) GetPort(ctx sdk.Context) string
  • func (k Keeper) GetReceiveEnabled(ctx sdk.Context) bool
  • func (k Keeper) GetSendEnabled(ctx sdk.Context) bool
  • func (k Keeper) GetTransferAccount(ctx sdk.Context) supplytypes.ModuleAccountI
  • func (k Keeper) HasDenomTrace(ctx sdk.Context, denomTraceHash tmbytes.HexBytes) bool
  • func (k Keeper) InitGenesis(ctx sdk.Context, state types.GenesisState)
  • func (k Keeper) IsBound(ctx sdk.Context, portID string) bool
  • func (k Keeper) IteratorDenomTrace(ctx sdk.Context, cb func(trace types.DenomTrace) (stop bool))
  • func (k Keeper) Logger(ctx sdk.Context) log.Logger
  • func (k Keeper) MarshalDenomTrace(denomTrace types.DenomTrace) ([]byte, error)
  • func (k Keeper) MustMarshalDenomTrace(denomTrace types.DenomTrace) []byte
  • func (k Keeper) MustUnmarshalDenomTrace(bz []byte) types.DenomTrace
  • func (k Keeper) OnAcknowledgementPacket(ctx sdk.Context, packet channeltypes.Packet, ...) error
  • func (k Keeper) OnRecvPacket(ctx sdk.Context, packet channeltypes.Packet, ...) error
  • func (k Keeper) OnTimeoutPacket(ctx sdk.Context, packet channeltypes.Packet, ...) error
  • func (k Keeper) SendTransfer(ctx sdk.Context, sourcePort, sourceChannel string, token sdk.Coin, ...) error
  • func (k Keeper) SetDenomTrace(ctx sdk.Context, denomTrace types.DenomTrace)
  • func (k Keeper) SetParams(ctx sdk.Context, params types.Params)
  • func (k Keeper) SetPort(ctx sdk.Context, portID string)
  • func (k Keeper) Transfer(ctx sdk.Context, msg *types.MsgTransfer) (*types.MsgTransferResponse, error)
  • func (k Keeper) UnmarshalDenomTrace(bz []byte) (types.DenomTrace, error)

Functions

func NewQuerier

func NewQuerier(k Keeper) sdk.Querier

Types

type Keeper

type Keeper struct {
	// contains filtered or unexported fields
}

Keeper defines the IBC fungible transfer keeper

func NewKeeper

func NewKeeper(
	cdc codec.BinaryMarshaler, key sdk.StoreKey, paramSpace params.Subspace,
	channelKeeper types.ChannelKeeper, portKeeper types.PortKeeper,
	supplyKeeper types.SupplyKeeper, scopedKeeper capabilitykeeper.ScopedKeeper,
) Keeper

NewKeeper creates a new IBC transfer Keeper instance

func (Keeper) AuthenticateCapability

func (k Keeper) AuthenticateCapability(ctx sdk.Context, cap *capabilitytypes.Capability, name string) bool

AuthenticateCapability wraps the scopedKeeper's AuthenticateCapability function

func (Keeper) BindPort

func (k Keeper) BindPort(ctx sdk.Context, portID string) error

BindPort defines a wrapper function for the ort Keeper's function in order to expose it to module's InitGenesis function

func (Keeper) ClaimCapability

func (k Keeper) ClaimCapability(ctx sdk.Context, cap *capabilitytypes.Capability, name string) error

ClaimCapability allows the transfer module that can claim a capability that IBC module passes to it

func (Keeper) DenomPathFromHash

func (k Keeper) DenomPathFromHash(ctx sdk.Context, denom string) (string, error)

DenomPathFromHash returns the full denomination path prefix from an ibc denom with a hash component.

func (Keeper) DenomTraces

func (q Keeper) DenomTraces(ctx sdk.Context, req *types.QueryDenomTracesRequest) (*types.QueryDenomTracesResponse, error)

DenomTraces implements the Query/DenomTraces gRPC method

func (Keeper) GetDenomTrace

func (k Keeper) GetDenomTrace(ctx sdk.Context, denomTraceHash tmbytes.HexBytes) (types.DenomTrace, bool)

GetDenomTrace retreives the full identifiers trace and base denomination from the store.

func (Keeper) GetParams

func (k Keeper) GetParams(ctx sdk.Context) (params types.Params)

func (Keeper) GetPort

func (k Keeper) GetPort(ctx sdk.Context) string

GetPort returns the portID for the transfer module. Used in ExportGenesis

func (Keeper) GetReceiveEnabled

func (k Keeper) GetReceiveEnabled(ctx sdk.Context) bool

GetReceiveEnabled retrieves the receive enabled boolean from the paramstore

func (Keeper) GetSendEnabled

func (k Keeper) GetSendEnabled(ctx sdk.Context) bool

GetSendEnabled retrieves the send enabled boolean from the paramstore

func (Keeper) GetTransferAccount

func (k Keeper) GetTransferAccount(ctx sdk.Context) supplytypes.ModuleAccountI

GetTransferAccount returns the ICS20 - transfers ModuleAccount

func (Keeper) HasDenomTrace

func (k Keeper) HasDenomTrace(ctx sdk.Context, denomTraceHash tmbytes.HexBytes) bool

HasDenomTrace checks if a the key with the given denomination trace hash exists on the store.

func (Keeper) InitGenesis

func (k Keeper) InitGenesis(ctx sdk.Context, state types.GenesisState)

InitGenesis initializes the ibc-transfer state and binds to PortID.

func (Keeper) IsBound

func (k Keeper) IsBound(ctx sdk.Context, portID string) bool

IsBound checks if the transfer module is already bound to the desired port

func (Keeper) IteratorDenomTrace

func (k Keeper) IteratorDenomTrace(ctx sdk.Context, cb func(trace types.DenomTrace) (stop bool))

func (Keeper) Logger

func (k Keeper) Logger(ctx sdk.Context) log.Logger

Logger returns a module-specific logger.

func (Keeper) MarshalDenomTrace

func (k Keeper) MarshalDenomTrace(denomTrace types.DenomTrace) ([]byte, error)

MarshalDenomTrace attempts to encode an DenomTrace object and returns the raw encoded bytes.

func (Keeper) MustMarshalDenomTrace

func (k Keeper) MustMarshalDenomTrace(denomTrace types.DenomTrace) []byte

MustMarshalDenomTrace attempts to encode an DenomTrace object and returns the raw encoded bytes. It panics on error.

func (Keeper) MustUnmarshalDenomTrace

func (k Keeper) MustUnmarshalDenomTrace(bz []byte) types.DenomTrace

MustUnmarshalDenomTrace attempts to decode and return an DenomTrace object from raw encoded bytes. It panics on error.

func (Keeper) OnAcknowledgementPacket

func (k Keeper) OnAcknowledgementPacket(ctx sdk.Context, packet channeltypes.Packet, data types.FungibleTokenPacketData, ack channeltypes.Acknowledgement) error

OnAcknowledgementPacket responds to the the success or failure of a packet acknowledgement written on the receiving chain. If the acknowledgement was a success then nothing occurs. If the acknowledgement failed, then the sender is refunded their tokens using the refundPacketToken function.

func (Keeper) OnRecvPacket

func (k Keeper) OnRecvPacket(ctx sdk.Context, packet channeltypes.Packet, data types.FungibleTokenPacketData) error

OnRecvPacket processes a cross chain fungible token transfer. If the sender chain is the source of minted tokens then vouchers will be minted and sent to the receiving address. Otherwise if the sender chain is sending back tokens this chain originally transferred to it, the tokens are unescrowed and sent to the receiving address.

func (Keeper) OnTimeoutPacket

func (k Keeper) OnTimeoutPacket(ctx sdk.Context, packet channeltypes.Packet, data types.FungibleTokenPacketData) error

OnTimeoutPacket refunds the sender since the original packet sent was never received and has been timed out.

func (Keeper) SendTransfer

func (k Keeper) SendTransfer(
	ctx sdk.Context,
	sourcePort,
	sourceChannel string,
	token sdk.Coin,
	sender sdk.AccAddress,
	receiver string,
	timeoutHeight clienttypes.Height,
	timeoutTimestamp uint64,
) error

SendTransfer handles transfer sending logic. There are 2 possible cases:

1. Sender chain is acting as the source zone. The coins are transferred to an escrow address (i.e locked) on the sender chain and then transferred to the receiving chain through IBC TAO logic. It is expected that the receiving chain will mint vouchers to the receiving address.

2. Sender chain is acting as the sink zone. The coins (vouchers) are burned on the sender chain and then transferred to the receiving chain though IBC TAO logic. It is expected that the receiving chain, which had previously sent the original denomination, will unescrow the fungible token and send it to the receiving address.

Another way of thinking of source and sink zones is through the token's timeline. Each send to any chain other than the one it was previously received from is a movement forwards in the token's timeline. This causes trace to be added to the token's history and the destination port and destination channel to be prefixed to the denomination. In these instances the sender chain is acting as the source zone. When the token is sent back to the chain it previously received from, the prefix is removed. This is a backwards movement in the token's timeline and the sender chain is acting as the sink zone.

Example: These steps of transfer occur: A -> B -> C -> A -> C -> B -> A

1. A -> B : sender chain is source zone. Denom upon receiving: 'B/denom' 2. B -> C : sender chain is source zone. Denom upon receiving: 'C/B/denom' 3. C -> A : sender chain is source zone. Denom upon receiving: 'A/C/B/denom' 4. A -> C : sender chain is sink zone. Denom upon receiving: 'C/B/denom' 5. C -> B : sender chain is sink zone. Denom upon receiving: 'B/denom' 6. B -> A : sender chain is sink zone. Denom upon receiving: 'denom'

func (Keeper) SetDenomTrace

func (k Keeper) SetDenomTrace(ctx sdk.Context, denomTrace types.DenomTrace)

SetDenomTrace sets a new {trace hash -> denom trace} pair to the store.

func (Keeper) SetParams

func (k Keeper) SetParams(ctx sdk.Context, params types.Params)

SetParams sets the total set of ibc-transfer parameters.

func (Keeper) SetPort

func (k Keeper) SetPort(ctx sdk.Context, portID string)

SetPort sets the portID for the transfer module. Used in InitGenesis

func (Keeper) Transfer

func (k Keeper) Transfer(ctx sdk.Context, msg *types.MsgTransfer) (*types.MsgTransferResponse, error)

Transfer defines a rpc handler method for MsgTransfer.

func (Keeper) UnmarshalDenomTrace

func (k Keeper) UnmarshalDenomTrace(bz []byte) (types.DenomTrace, error)

UnmarshalDenomTrace attempts to decode and return an DenomTrace object from raw encoded bytes.