Documentation ¶
Index ¶
- func LibwasmvmVersion() (string, error)
- type Checksum
- type GasMeter
- type GoAPI
- type KVStore
- type Querier
- type VM
- func (vm *VM) AnalyzeCode(checksum Checksum) (*types.AnalysisReport, error)
- func (vm *VM) Cleanup()
- func (vm *VM) Create(code WasmCode) (Checksum, error)
- func (vm *VM) Execute(checksum Checksum, env types.Env, info types.MessageInfo, executeMsg []byte, ...) (*types.Response, uint64, error)
- func (vm *VM) GetCode(checksum Checksum) (WasmCode, error)
- func (vm *VM) GetMetrics() (*types.Metrics, error)
- func (vm *VM) IBCChannelClose(checksum Checksum, env types.Env, msg types.IBCChannelCloseMsg, store KVStore, ...) (*types.IBCBasicResponse, uint64, error)
- func (vm *VM) IBCChannelConnect(checksum Checksum, env types.Env, msg types.IBCChannelConnectMsg, ...) (*types.IBCBasicResponse, uint64, error)
- func (vm *VM) IBCChannelOpen(checksum Checksum, env types.Env, msg types.IBCChannelOpenMsg, store KVStore, ...) (*types.IBC3ChannelOpenResponse, uint64, error)
- func (vm *VM) IBCPacketAck(checksum Checksum, env types.Env, msg types.IBCPacketAckMsg, store KVStore, ...) (*types.IBCBasicResponse, uint64, error)
- func (vm *VM) IBCPacketReceive(checksum Checksum, env types.Env, msg types.IBCPacketReceiveMsg, store KVStore, ...) (*types.IBCReceiveResult, uint64, error)
- func (vm *VM) IBCPacketTimeout(checksum Checksum, env types.Env, msg types.IBCPacketTimeoutMsg, store KVStore, ...) (*types.IBCBasicResponse, uint64, error)
- func (vm *VM) Instantiate(checksum Checksum, env types.Env, info types.MessageInfo, initMsg []byte, ...) (*types.Response, uint64, error)
- func (vm *VM) Migrate(checksum Checksum, env types.Env, migrateMsg []byte, store KVStore, ...) (*types.Response, uint64, error)
- func (vm *VM) Pin(checksum Checksum) error
- func (vm *VM) Query(checksum Checksum, env types.Env, queryMsg []byte, store KVStore, goapi GoAPI, ...) ([]byte, uint64, error)
- func (vm *VM) Reply(checksum Checksum, env types.Env, reply types.Reply, store KVStore, ...) (*types.Response, uint64, error)
- func (vm *VM) Sudo(checksum Checksum, env types.Env, sudoMsg []byte, store KVStore, goapi GoAPI, ...) (*types.Response, uint64, error)
- func (vm *VM) Unpin(checksum Checksum) error
- type WasmCode
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func LibwasmvmVersion ¶
LibwasmvmVersion returns the version of the loaded library at runtime. This can be used for debugging to verify the loaded version matches the expected version.
Types ¶
type Checksum ¶
type Checksum []byte
Checksum represents a hash of the Wasm bytecode that serves as an ID. Must be generated from this library.
type VM ¶
type VM struct {
// contains filtered or unexported fields
}
VM is the main entry point to this library. You should create an instance with its own subdirectory to manage state inside, and call it for all cosmwasm code related actions.
func NewVM ¶
func NewVM(dataDir string, supportedFeatures string, memoryLimit uint32, printDebug bool, cacheSize uint32) (*VM, error)
NewVM creates a new VM.
`dataDir` is a base directory for Wasm blobs and various caches. `supportedFeatures` is a comma separated list of features suppored by the chain. `memoryLimit` is the memory limit of each contract execution (in MiB) `printDebug` is a flag to enable/disable printing debug logs from the contract to STDOUT. This should be false in production environments. `cacheSize` sets the size in MiB of an in-memory cache for e.g. module caching. Set to 0 to disable. `deserCost` sets the gas cost of deserializing one byte of data.
func (*VM) AnalyzeCode ¶
func (vm *VM) AnalyzeCode(checksum Checksum) (*types.AnalysisReport, error)
Returns a report of static analysis of the wasm contract (uncompiled). This contract must have been stored in the cache previously (via Create). Only info currently returned is if it exposes all ibc entry points, but this may grow later
func (*VM) Cleanup ¶
func (vm *VM) Cleanup()
Cleanup should be called when no longer using this to free resources on the rust-side
func (*VM) Create ¶
Create will compile the wasm code, and store the resulting pre-compile as well as the original code. Both can be referenced later via Checksum This must be done one time for given code, after which it can be instatitated many times, and each instance called many times.
For example, the code for all ERC-20 contracts should be the same. This function stores the code for that contract only once, but it can be instantiated with custom inputs in the future.
TODO: return gas cost? Add gas limit??? there is no metering here...
func (*VM) Execute ¶
func (vm *VM) Execute( checksum Checksum, env types.Env, info types.MessageInfo, executeMsg []byte, store KVStore, goapi GoAPI, querier Querier, gasMeter GasMeter, gasLimit uint64, deserCost types.UFraction, ) (*types.Response, uint64, error)
Execute calls a given contract. Since the only difference between contracts with the same Checksum is the data in their local storage, and their address in the outside world, we need no ContractID here. (That is a detail for the external, sdk-facing, side).
The caller is responsible for passing the correct `store` (which must have been initialized exactly once), and setting the env with relevent info on this instance (address, balance, etc)
func (*VM) GetCode ¶
GetCode will load the original wasm code for the given code id. This will only succeed if that code id was previously returned from a call to Create.
This can be used so that the (short) code id (hash) is stored in the iavl tree and the larger binary blobs (wasm and pre-compiles) are all managed by the rust library
func (*VM) GetMetrics ¶
GetMetrics some internal metrics for monitoring purposes.
func (*VM) IBCChannelClose ¶
func (vm *VM) IBCChannelClose( checksum Checksum, env types.Env, msg types.IBCChannelCloseMsg, store KVStore, goapi GoAPI, querier Querier, gasMeter GasMeter, gasLimit uint64, deserCost types.UFraction, ) (*types.IBCBasicResponse, uint64, error)
IBCChannelClose is available on IBC-enabled contracts and is a hook to call into at the end of the channel lifetime
func (*VM) IBCChannelConnect ¶
func (vm *VM) IBCChannelConnect( checksum Checksum, env types.Env, msg types.IBCChannelConnectMsg, store KVStore, goapi GoAPI, querier Querier, gasMeter GasMeter, gasLimit uint64, deserCost types.UFraction, ) (*types.IBCBasicResponse, uint64, error)
IBCChannelConnect is available on IBC-enabled contracts and is a hook to call into during the handshake pahse
func (*VM) IBCChannelOpen ¶
func (vm *VM) IBCChannelOpen( checksum Checksum, env types.Env, msg types.IBCChannelOpenMsg, store KVStore, goapi GoAPI, querier Querier, gasMeter GasMeter, gasLimit uint64, deserCost types.UFraction, ) (*types.IBC3ChannelOpenResponse, uint64, error)
IBCChannelOpen is available on IBC-enabled contracts and is a hook to call into during the handshake pahse
func (*VM) IBCPacketAck ¶
func (vm *VM) IBCPacketAck( checksum Checksum, env types.Env, msg types.IBCPacketAckMsg, store KVStore, goapi GoAPI, querier Querier, gasMeter GasMeter, gasLimit uint64, deserCost types.UFraction, ) (*types.IBCBasicResponse, uint64, error)
IBCPacketAck is available on IBC-enabled contracts and is called when an the response for an outgoing packet (previously sent by this contract) is received
func (*VM) IBCPacketReceive ¶
func (vm *VM) IBCPacketReceive( checksum Checksum, env types.Env, msg types.IBCPacketReceiveMsg, store KVStore, goapi GoAPI, querier Querier, gasMeter GasMeter, gasLimit uint64, deserCost types.UFraction, ) (*types.IBCReceiveResult, uint64, error)
IBCPacketReceive is available on IBC-enabled contracts and is called when an incoming packet is received on a channel belonging to this contract
func (*VM) IBCPacketTimeout ¶
func (vm *VM) IBCPacketTimeout( checksum Checksum, env types.Env, msg types.IBCPacketTimeoutMsg, store KVStore, goapi GoAPI, querier Querier, gasMeter GasMeter, gasLimit uint64, deserCost types.UFraction, ) (*types.IBCBasicResponse, uint64, error)
IBCPacketTimeout is available on IBC-enabled contracts and is called when an outgoing packet (previously sent by this contract) will provably never be executed. Usually handled like ack returning an error
func (*VM) Instantiate ¶
func (vm *VM) Instantiate( checksum Checksum, env types.Env, info types.MessageInfo, initMsg []byte, store KVStore, goapi GoAPI, querier Querier, gasMeter GasMeter, gasLimit uint64, deserCost types.UFraction, ) (*types.Response, uint64, error)
Instantiate will create a new contract based on the given Checksum. We can set the initMsg (contract "genesis") here, and it then receives an account and address and can be invoked (Execute) many times.
Storage should be set with a PrefixedKVStore that this code can safely access.
Under the hood, we may recompile the wasm, use a cached native compile, or even use a cached instance for performance.
func (*VM) Migrate ¶
func (vm *VM) Migrate( checksum Checksum, env types.Env, migrateMsg []byte, store KVStore, goapi GoAPI, querier Querier, gasMeter GasMeter, gasLimit uint64, deserCost types.UFraction, ) (*types.Response, uint64, error)
Migrate will migrate an existing contract to a new code binary. This takes storage of the data from the original contract and the Checksum of the new contract that should replace it. This allows it to run a migration step if needed, or return an error if unable to migrate the given data.
MigrateMsg has some data on how to perform the migration.
func (*VM) Pin ¶
Pin pins a code to an in-memory cache, such that is always loaded quickly when executed. Pin is idempotent.
func (*VM) Query ¶
func (vm *VM) Query( checksum Checksum, env types.Env, queryMsg []byte, store KVStore, goapi GoAPI, querier Querier, gasMeter GasMeter, gasLimit uint64, deserCost types.UFraction, ) ([]byte, uint64, error)
Query allows a client to execute a contract-specific query. If the result is not empty, it should be valid json-encoded data to return to the client. The meaning of path and data can be determined by the code. Path is the suffix of the abci.QueryRequest.Path
func (*VM) Reply ¶
func (vm *VM) Reply( checksum Checksum, env types.Env, reply types.Reply, store KVStore, goapi GoAPI, querier Querier, gasMeter GasMeter, gasLimit uint64, deserCost types.UFraction, ) (*types.Response, uint64, error)
Reply allows the native Go wasm modules to make a priviledged call to return the result of executing a SubMsg.
These work much like Sudo (same scenario) but focuses on one specific case (and one message type)
func (*VM) Sudo ¶
func (vm *VM) Sudo( checksum Checksum, env types.Env, sudoMsg []byte, store KVStore, goapi GoAPI, querier Querier, gasMeter GasMeter, gasLimit uint64, deserCost types.UFraction, ) (*types.Response, uint64, error)
Sudo allows native Go modules to make priviledged (sudo) calls on the contract. The contract can expose entry points that cannot be triggered by any transaction, but only via native Go modules, and delegate the access control to the system.
These work much like Migrate (same scenario) but allows custom apps to extend the priviledged entry points without forking cosmwasm-vm.