forked from cerc-io/laconicd-deprecated
68 lines
2.6 KiB
Go
68 lines
2.6 KiB
Go
package keeper
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import (
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"fmt"
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"strings"
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wasmvmtypes "github.com/CosmWasm/wasmvm/types"
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sdk "github.com/cosmos/cosmos-sdk/types"
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sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
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"github.com/cerc-io/laconicd/x/wasm/types"
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)
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// newWasmModuleEvent creates with wasm module event for interacting with the given contract. Adds custom attributes
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// to this event.
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func newWasmModuleEvent(customAttributes []wasmvmtypes.EventAttribute, contractAddr sdk.AccAddress) (sdk.Events, error) {
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attrs, err := contractSDKEventAttributes(customAttributes, contractAddr)
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if err != nil {
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return nil, err
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}
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// each wasm invocation always returns one sdk.Event
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return sdk.Events{sdk.NewEvent(types.WasmModuleEventType, attrs...)}, nil
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}
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const eventTypeMinLength = 2
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// newCustomEvents converts wasmvm events from a contract response to sdk type events
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func newCustomEvents(evts wasmvmtypes.Events, contractAddr sdk.AccAddress) (sdk.Events, error) {
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events := make(sdk.Events, 0, len(evts))
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for _, e := range evts {
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typ := strings.TrimSpace(e.Type)
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if len(typ) <= eventTypeMinLength {
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return nil, sdkerrors.Wrap(types.ErrInvalidEvent, fmt.Sprintf("Event type too short: '%s'", typ))
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}
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attributes, err := contractSDKEventAttributes(e.Attributes, contractAddr)
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if err != nil {
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return nil, err
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}
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events = append(events, sdk.NewEvent(fmt.Sprintf("%s%s", types.CustomContractEventPrefix, typ), attributes...))
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}
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return events, nil
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}
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// convert and add contract address issuing this event
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func contractSDKEventAttributes(customAttributes []wasmvmtypes.EventAttribute, contractAddr sdk.AccAddress) ([]sdk.Attribute, error) {
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attrs := []sdk.Attribute{sdk.NewAttribute(types.AttributeKeyContractAddr, contractAddr.String())}
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// append attributes from wasm to the sdk.Event
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for _, l := range customAttributes {
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// ensure key and value are non-empty (and trim what is there)
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key := strings.TrimSpace(l.Key)
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if len(key) == 0 {
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return nil, sdkerrors.Wrap(types.ErrInvalidEvent, fmt.Sprintf("Empty attribute key. Value: %s", l.Value))
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}
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value := strings.TrimSpace(l.Value)
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// TODO: check if this is legal in the SDK - if it is, we can remove this check
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if len(value) == 0 {
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return nil, sdkerrors.Wrap(types.ErrInvalidEvent, fmt.Sprintf("Empty attribute value. Key: %s", key))
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}
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// and reserve all _* keys for our use (not contract)
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if strings.HasPrefix(key, types.AttributeReservedPrefix) {
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return nil, sdkerrors.Wrap(types.ErrInvalidEvent, fmt.Sprintf("Attribute key starts with reserved prefix %s: '%s'", types.AttributeReservedPrefix, key))
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}
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attrs = append(attrs, sdk.NewAttribute(key, value))
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}
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return attrs, nil
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}
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