wasm

package
v0.7.2 Latest Latest
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 Go to latest Published: Apr 13, 2020 License: Apache-2.0 Imports: 14 Imported by: 0

README

Wasm Module

This should be a brief overview of the functionality

Configuration

You can add the following section to config/app.toml. Below is shown with defaults:

[wasm]
# This is the maximum sdk gas (wasm and storage) that we allow for any x/wasm "smart" queries
query_gas_limit = 300000
# This is the number of wasm vm instances we keep cached in memory for speed-up
# Warning: this is currently unstable and may lead to crashes, best to keep for 0 unless testing locally
lru_size = 0

Events

A number of events are returned to allow good indexing of the transactions from smart contracts.

Every call to Instantiate or Execute will be tagged with the info on the contract that was executed and who executed it. It should look something like this (with different addresses). The module is always wasm, and code_id is only present when Instantiating a contract, so you can subscribe to new instances, it is omitted on Execute. There is also an action tag which is auto-added by the Cosmos SDK and has a value of either store-code, instantiate or execute depending on which message was sent:

{
    "Type": "message",
    "Attr": [
        {
            "key": "module",
            "value": "wasm"
        },
        {
            "key": "action",
            "value": "instantiate"
        },
        {
            "key": "signer",
            "value": "cosmos1vx8knpllrj7n963p9ttd80w47kpacrhuts497x"
        },
        {
            "key": "code_id",
            "value": "1"
        },
        {
            "key": "contract_address",
            "value": "cosmos18vd8fpwxzck93qlwghaj6arh4p7c5n89uzcee5"
        }
    ]
}

If any funds were transferred to the contract as part of the message, or if the contract released funds as part of it's executions, it will receive the typical events associated with sending tokens from bank. In this case, we instantiate the contract and provide a initial balance in the same MsgInstantiateContract. We see the following events in addition to the above one:

[
    {
        "Type": "transfer",
        "Attr": [
            {
                "key": "recipient",
                "value": "cosmos18vd8fpwxzck93qlwghaj6arh4p7c5n89uzcee5"
            },
            {
                "key": "sender",
                "value": "cosmos1ffnqn02ft2psvyv4dyr56nnv6plllf9pm2kpmv"
            },
            {
                "key": "amount",
                "value": "100000denom"
            }
        ]
    }
]

Finally, the contract itself can emit a "custom event" on Execute only (not on Init). There is one event per contract, so if one contract calls a second contract, you may receive one event for the original contract and one for the re-invoked contract. All attributes from the contract are passed through verbatim, and we add a contract_address attribute that contains the actual contract that emitted that event. Here is an example from the escrow contract successfully releasing funds to the destination address:

{
    "Type": "wasm",
    "Attr": [
        {
            "key": "contract_address",
            "value": "cosmos18vd8fpwxzck93qlwghaj6arh4p7c5n89uzcee5"
        },
        {
            "key": "action",
            "value": "release"
        },
        {
            "key": "destination",
            "value": "cosmos14k7v7ms4jxkk2etmg9gljxjm4ru3qjdugfsflq"
        }
    ]
}
Pulling this all together

We will invoke an escrow contract to release to the designated beneficiary. The escrow was previously loaded with 100000denom (from the above example). In this transaction, we send 5000denom along with the MsgExecuteContract and the contract releases the entire funds (105000denom) to the beneficiary.

We will see all the following events, where you should be able to reconstruct the actions (remember there are two events for each transfer). We see (1) the initial transfer of funds to the contract, (2) the contract custom event that it released funds (3) the transfer of funds from the contract to the beneficiary and (4) the generic x/wasm event stating that the contract was executed (which always appears, while 2 is optional and has information as reliable as the contract):

[
    {
        "Type": "transfer",
        "Attr": [
            {
                "key": "recipient",
                "value": "cosmos18vd8fpwxzck93qlwghaj6arh4p7c5n89uzcee5"
            },
            {
                "key": "sender",
                "value": "cosmos1zm074khx32hqy20hlshlsd423n07pwlu9cpt37"
            },
            {
                "key": "amount",
                "value": "5000denom"
            }
        ]
    },
    {
        "Type": "wasm",
        "Attr": [
            {
                "key": "contract_address",
                "value": "cosmos18vd8fpwxzck93qlwghaj6arh4p7c5n89uzcee5"
            },
            {
                "key": "action",
                "value": "release"
            },
            {
                "key": "destination",
                "value": "cosmos14k7v7ms4jxkk2etmg9gljxjm4ru3qjdugfsflq"
            }
        ]
    },
    {
        "Type": "transfer",
        "Attr": [
            {
                "key": "recipient",
                "value": "cosmos14k7v7ms4jxkk2etmg9gljxjm4ru3qjdugfsflq"
            },
            {
                "key": "sender",
                "value": "cosmos18vd8fpwxzck93qlwghaj6arh4p7c5n89uzcee5"
            },
            {
                "key": "amount",
                "value": "105000denom"
            }
        ]
    },
    {
        "Type": "message",
        "Attr": [
            {
                "key": "module",
                "value": "wasm"
            },
            {
                "key": "action",
                "value": "execute"
            },
            {
                "key": "signer",
                "value": "cosmos1zm074khx32hqy20hlshlsd423n07pwlu9cpt37"
            },
            {
                "key": "contract_address",
                "value": "cosmos18vd8fpwxzck93qlwghaj6arh4p7c5n89uzcee5"
            }
        ]
    }
]

A note on this format. This is what we return from our module. However, it seems to me that many events with the same Type get merged together somewhere along the stack, so in this case, you may end up with one "transfer" event with the info for both transfers. Double check when evaluating the event logs, I will document better with more experience, especially when I find out the entire path for the events.

Messages

TODO

CLI

TODO - working, but not the nicest interface (json + bash = bleh). Use to upload, but I suggest to focus on frontend / js tooling

Rest

TODO - main supported interface, under rapid change

Documentation

Overview

nolint autogenerated code using github.com/rigelrozanski/multitool aliases generated for the following subdirectories: ALIASGEN: github.com/cosmwasm/wasmd/x/wasm/internal/types ALIASGEN: github.com/cosmwasm/wasmd/x/wasm/internal/keeper

Index

Constants

View Source 
const (
	ModuleName                    = types.ModuleName
	StoreKey                      = types.StoreKey
	TStoreKey                     = types.TStoreKey
	QuerierRoute                  = types.QuerierRoute
	RouterKey                     = types.RouterKey
	MaxWasmSize                   = types.MaxWasmSize
	GasMultiplier                 = keeper.GasMultiplier
	MaxGas                        = keeper.MaxGas
	QueryGetContract              = keeper.QueryGetContract
	QueryGetContractState         = keeper.QueryGetContractState
	QueryGetCode                  = keeper.QueryGetCode
	QueryListCode                 = keeper.QueryListCode
	QueryListContractByCode       = keeper.QueryListContractByCode
	QueryMethodContractStateSmart = keeper.QueryMethodContractStateSmart
	QueryMethodContractStateAll   = keeper.QueryMethodContractStateAll
	QueryMethodContractStateRaw   = keeper.QueryMethodContractStateRaw
)
View Source 
const (
	AttributeKeyContract = "contract_address"
	AttributeKeyCodeID   = "code_id"
	AttributeSigner      = "signer"
)

Variables

View Source 
var (
	// functions aliases
	RegisterCodec             = types.RegisterCodec
	ValidateGenesis           = types.ValidateGenesis
	GetCodeKey                = types.GetCodeKey
	GetContractAddressKey     = types.GetContractAddressKey
	GetContractStorePrefixKey = types.GetContractStorePrefixKey
	NewCodeInfo               = types.NewCodeInfo
	NewParams                 = types.NewParams
	NewWasmCoins              = types.NewWasmCoins
	NewContractInfo           = types.NewContractInfo
	CosmosResult              = types.CosmosResult
	DefaultWasmConfig         = types.DefaultWasmConfig
	InitGenesis               = keeper.InitGenesis
	ExportGenesis             = keeper.ExportGenesis
	NewKeeper                 = keeper.NewKeeper
	NewQuerier                = keeper.NewQuerier
	MakeTestCodec             = keeper.MakeTestCodec
	CreateTestInput           = keeper.CreateTestInput

	// variable aliases
	ModuleCdc            = types.ModuleCdc
	DefaultCodespace     = types.DefaultCodespace
	ErrCreateFailed      = types.ErrCreateFailed
	ErrAccountExists     = types.ErrAccountExists
	ErrInstantiateFailed = types.ErrInstantiateFailed
	ErrExecuteFailed     = types.ErrExecuteFailed
	ErrGasLimit          = types.ErrGasLimit
	ErrInvalidGenesis    = types.ErrInvalidGenesis
	ErrNotFound          = types.ErrNotFound
	ErrQueryFailed       = types.ErrQueryFailed
	KeyLastCodeID        = types.KeyLastCodeID
	KeyLastInstanceID    = types.KeyLastInstanceID
	CodeKeyPrefix        = types.CodeKeyPrefix
	ContractKeyPrefix    = types.ContractKeyPrefix
	ContractStorePrefix  = types.ContractStorePrefix
)

Functions

func NewHandler 

func NewHandler(k Keeper) sdk.Handler

NewHandler returns a handler for "bank" type messages.

Types

type AppModule 

type AppModule struct {
	AppModuleBasic
	// contains filtered or unexported fields
}

AppModule implements an application module for the wasm module.

func NewAppModule 

func NewAppModule(keeper Keeper) AppModule

NewAppModule creates a new AppModule object

func (AppModule) BeginBlock 

func (am AppModule) BeginBlock(_ sdk.Context, _ abci.RequestBeginBlock)

BeginBlock returns the begin blocker for the wasm module.

func (AppModule) EndBlock 

func (AppModule) EndBlock(_ sdk.Context, _ abci.RequestEndBlock) []abci.ValidatorUpdate

EndBlock returns the end blocker for the wasm module. It returns no validator updates.

func (AppModule) ExportGenesis 

func (am AppModule) ExportGenesis(ctx sdk.Context) json.RawMessage

ExportGenesis returns the exported genesis state as raw bytes for the wasm module.

func (AppModule) InitGenesis 

func (am AppModule) InitGenesis(ctx sdk.Context, data json.RawMessage) []abci.ValidatorUpdate

InitGenesis performs genesis initialization for the wasm module. It returns no validator updates.

func (AppModule) Name 

func (AppModule) Name() string

Name returns the wasm module's name.

func (AppModule) NewHandler 

func (am AppModule) NewHandler() sdk.Handler

NewHandler returns an sdk.Handler for the wasm module.

func (AppModule) NewQuerierHandler 

func (am AppModule) NewQuerierHandler() sdk.Querier

NewQuerierHandler returns the wasm module sdk.Querier.

func (AppModule) QuerierRoute 

func (AppModule) QuerierRoute() string

QuerierRoute returns the wasm module's querier route name.

func (AppModule) RegisterInvariants 

func (am AppModule) RegisterInvariants(ir sdk.InvariantRegistry)

RegisterInvariants registers the wasm module invariants.

func (AppModule) Route 

func (AppModule) Route() string

Route returns the message routing key for the wasm module.

type AppModuleBasic 

type AppModuleBasic struct{}

AppModuleBasic defines the basic application module used by the wasm module.

func (AppModuleBasic) DefaultGenesis 

func (AppModuleBasic) DefaultGenesis() json.RawMessage

DefaultGenesis returns default genesis state as raw bytes for the wasm module.

func (AppModuleBasic) GetQueryCmd 

func (AppModuleBasic) GetQueryCmd(cdc *codec.Codec) *cobra.Command

GetQueryCmd returns no root query command for the wasm module.

func (AppModuleBasic) GetTxCmd 

func (AppModuleBasic) GetTxCmd(cdc *codec.Codec) *cobra.Command

GetTxCmd returns the root tx command for the wasm module.

func (AppModuleBasic) Name 

func (AppModuleBasic) Name() string

Name returns the wasm module's name.

func (AppModuleBasic) RegisterCodec 

func (AppModuleBasic) RegisterCodec(cdc *codec.Codec)

RegisterCodec registers the wasm module's types for the given codec.

func (AppModuleBasic) RegisterRESTRoutes 

func (AppModuleBasic) RegisterRESTRoutes(ctx context.CLIContext, rtr *mux.Router)

RegisterRESTRoutes registers the REST routes for the wasm module.

func (AppModuleBasic) ValidateGenesis 

func (AppModuleBasic) ValidateGenesis(bz json.RawMessage) error

ValidateGenesis performs genesis state validation for the wasm module.

type Code 

type Code = types.Code

type CodeInfo 

type CodeInfo = types.CodeInfo

type Contract 

type Contract = types.Contract

type ContractInfo 

type ContractInfo = types.ContractInfo

type ContractInfoWithAddress added in v0.7.0 

type ContractInfoWithAddress = keeper.ContractInfoWithAddress

type GenesisState 

type GenesisState = types.GenesisState

type GetCodeResponse 

type GetCodeResponse = keeper.GetCodeResponse

type Keeper 

type Keeper = keeper.Keeper

type ListCodeResponse 

type ListCodeResponse = keeper.ListCodeResponse

type Model 

type Model = types.Model

type MsgExecuteContract 

type MsgExecuteContract = types.MsgExecuteContract

type MsgInstantiateContract 

type MsgInstantiateContract = types.MsgInstantiateContract

type MsgStoreCode 

type MsgStoreCode = types.MsgStoreCode

type WasmConfig 

type WasmConfig = types.WasmConfig

Source Files

View all Source files

Directories

Path Synopsis
client
cli
rest
utils
internal
keeper
types

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