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handler.go
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handler.go
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package oracle
import (
"fmt"
"github.com/bandprotocol/chain/pkg/gzip"
"github.com/bandprotocol/chain/x/oracle/types"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
)
// NewHandler creates the msg handler of this module, as required by Cosmos-SDK standard.
func NewHandler(k Keeper) sdk.Handler {
return func(ctx sdk.Context, msg sdk.Msg) (*sdk.Result, error) {
ctx = ctx.WithEventManager(sdk.NewEventManager())
switch msg := msg.(type) {
case MsgCreateDataSource:
return handleMsgCreateDataSource(ctx, k, msg)
case MsgEditDataSource:
return handleMsgEditDataSource(ctx, k, msg)
case MsgCreateOracleScript:
return handleMsgCreateOracleScript(ctx, k, msg)
case MsgEditOracleScript:
return handleMsgEditOracleScript(ctx, k, msg)
case MsgRequestData:
return handleMsgRequestData(ctx, k, msg)
case MsgReportData:
return handleMsgReportData(ctx, k, msg)
case MsgActivate:
return handleMsgActivate(ctx, k, msg)
case MsgAddReporter:
return handleMsgAddReporter(ctx, k, msg)
case MsgRemoveReporter:
return handleMsgRemoveReporter(ctx, k, msg)
default:
return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unrecognized %s message type: %T", ModuleName, msg)
}
}
}
func handleMsgCreateDataSource(ctx sdk.Context, k Keeper, m MsgCreateDataSource) (*sdk.Result, error) {
if gzip.IsGzipped(m.Executable) {
var err error
m.Executable, err = gzip.Uncompress(m.Executable, types.MaxExecutableSize)
if err != nil {
return nil, sdkerrors.Wrapf(types.ErrUncompressionFailed, err.Error())
}
}
id := k.AddDataSource(ctx, types.NewDataSource(
m.Owner, m.Name, m.Description, k.AddExecutableFile(m.Executable),
))
ctx.EventManager().EmitEvent(sdk.NewEvent(
types.EventTypeCreateDataSource,
sdk.NewAttribute(types.AttributeKeyID, fmt.Sprintf("%d", id)),
))
return &sdk.Result{Events: ctx.EventManager().Events()}, nil
}
func handleMsgEditDataSource(ctx sdk.Context, k Keeper, m MsgEditDataSource) (*sdk.Result, error) {
dataSource, err := k.GetDataSource(ctx, m.DataSourceID)
if err != nil {
return nil, err
}
if !dataSource.Owner.Equals(m.Sender) {
return nil, types.ErrEditorNotAuthorized
}
if gzip.IsGzipped(m.Executable) {
m.Executable, err = gzip.Uncompress(m.Executable, types.MaxExecutableSize)
if err != nil {
return nil, sdkerrors.Wrapf(types.ErrUncompressionFailed, err.Error())
}
}
// Can safely use MustEdit here, as we already checked that the data source exists above.
k.MustEditDataSource(ctx, m.DataSourceID, types.NewDataSource(
m.Owner, m.Name, m.Description, k.AddExecutableFile(m.Executable),
))
ctx.EventManager().EmitEvent(sdk.NewEvent(
types.EventTypeEditDataSource,
sdk.NewAttribute(types.AttributeKeyID, fmt.Sprintf("%d", m.DataSourceID)),
))
return &sdk.Result{Events: ctx.EventManager().Events()}, nil
}
func handleMsgCreateOracleScript(ctx sdk.Context, k Keeper, m MsgCreateOracleScript) (*sdk.Result, error) {
if gzip.IsGzipped(m.Code) {
var err error
m.Code, err = gzip.Uncompress(m.Code, types.MaxWasmCodeSize)
if err != nil {
return nil, sdkerrors.Wrapf(types.ErrUncompressionFailed, err.Error())
}
}
filename, err := k.AddOracleScriptFile(m.Code)
if err != nil {
return nil, err
}
id := k.AddOracleScript(ctx, types.NewOracleScript(
m.Owner, m.Name, m.Description, filename, m.Schema, m.SourceCodeURL,
))
ctx.EventManager().EmitEvent(sdk.NewEvent(
types.EventTypeCreateOracleScript,
sdk.NewAttribute(types.AttributeKeyID, fmt.Sprintf("%d", id)),
))
return &sdk.Result{Events: ctx.EventManager().Events()}, nil
}
func handleMsgEditOracleScript(ctx sdk.Context, k Keeper, m MsgEditOracleScript) (*sdk.Result, error) {
oracleScript, err := k.GetOracleScript(ctx, m.OracleScriptID)
if err != nil {
return nil, err
}
if !oracleScript.Owner.Equals(m.Sender) {
return nil, types.ErrEditorNotAuthorized
}
if gzip.IsGzipped(m.Code) {
m.Code, err = gzip.Uncompress(m.Code, types.MaxWasmCodeSize)
if err != nil {
return nil, sdkerrors.Wrapf(types.ErrUncompressionFailed, err.Error())
}
}
filename, err := k.AddOracleScriptFile(m.Code)
if err != nil {
return nil, err
}
k.MustEditOracleScript(ctx, m.OracleScriptID, types.NewOracleScript(
m.Owner, m.Name, m.Description, filename, m.Schema, m.SourceCodeURL,
))
ctx.EventManager().EmitEvent(sdk.NewEvent(
types.EventTypeEditOracleScript,
sdk.NewAttribute(types.AttributeKeyID, fmt.Sprintf("%d", m.OracleScriptID)),
))
return &sdk.Result{Events: ctx.EventManager().Events()}, nil
}
func handleMsgRequestData(ctx sdk.Context, k Keeper, m MsgRequestData) (*sdk.Result, error) {
err := k.PrepareRequest(ctx, &m)
if err != nil {
return nil, err
}
return &sdk.Result{Events: ctx.EventManager().Events()}, nil
}
func handleMsgReportData(ctx sdk.Context, k Keeper, m MsgReportData) (*sdk.Result, error) {
if !k.IsReporter(ctx, m.Validator, m.Reporter) {
return nil, types.ErrReporterNotAuthorized
}
if m.RequestID <= k.GetRequestLastExpired(ctx) {
return nil, types.ErrRequestAlreadyExpired
}
err := k.AddReport(ctx, m.RequestID, types.NewReport(m.Validator, !k.HasResult(ctx, m.RequestID), m.RawReports))
if err != nil {
return nil, err
}
req := k.MustGetRequest(ctx, m.RequestID)
if k.GetReportCount(ctx, m.RequestID) == req.MinCount {
// At the exact moment when the number of reports is sufficient, we add the request to
// the pending resolve list. This can happen at most one time for any request.
k.AddPendingRequest(ctx, m.RequestID)
}
ctx.EventManager().EmitEvent(sdk.NewEvent(
types.EventTypeReport,
sdk.NewAttribute(types.AttributeKeyID, fmt.Sprintf("%d", m.RequestID)),
sdk.NewAttribute(types.AttributeKeyValidator, m.Validator.String()),
))
return &sdk.Result{Events: ctx.EventManager().Events()}, nil
}
func handleMsgActivate(ctx sdk.Context, k Keeper, m MsgActivate) (*sdk.Result, error) {
err := k.Activate(ctx, m.Validator)
if err != nil {
return nil, err
}
ctx.EventManager().EmitEvent(sdk.NewEvent(
types.EventTypeActivate,
sdk.NewAttribute(types.AttributeKeyValidator, m.Validator.String()),
))
return &sdk.Result{Events: ctx.EventManager().Events()}, nil
}
func handleMsgAddReporter(ctx sdk.Context, k Keeper, m MsgAddReporter) (*sdk.Result, error) {
err := k.AddReporter(ctx, m.Validator, m.Reporter)
if err != nil {
return nil, err
}
ctx.EventManager().EmitEvent(sdk.NewEvent(
types.EventTypeAddReporter,
sdk.NewAttribute(types.AttributeKeyValidator, m.Validator.String()),
sdk.NewAttribute(types.AttributeKeyReporter, m.Reporter.String()),
))
return &sdk.Result{Events: ctx.EventManager().Events()}, nil
}
func handleMsgRemoveReporter(ctx sdk.Context, k Keeper, m MsgRemoveReporter) (*sdk.Result, error) {
err := k.RemoveReporter(ctx, m.Validator, m.Reporter)
if err != nil {
return nil, err
}
ctx.EventManager().EmitEvent(sdk.NewEvent(
types.EventTypeRemoveReporter,
sdk.NewAttribute(types.AttributeKeyValidator, m.Validator.String()),
sdk.NewAttribute(types.AttributeKeyReporter, m.Reporter.String()),
))
return &sdk.Result{Events: ctx.EventManager().Events()}, nil
}