added keeper submit scavange

Author: nashqueue

x/scavenge/keeper/msg_server_submit_scavenge.go

@@ -1,17 +1,59 @@
+// x/scavenge/keeper/msg_server_submit_scavenge.go
+
 package keeper
 
 import (
 	"context"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
+	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
+	"github.com/tendermint/tendermint/crypto"
+
 	"scavenge/x/scavenge/types"
 )
 
 func (k msgServer) SubmitScavenge(goCtx context.Context, msg *types.MsgSubmitScavenge) (*types.MsgSubmitScavengeResponse, error) {
+	// get context that contains information about the environment, such as block height
 	ctx := sdk.UnwrapSDKContext(goCtx)
 
-	// TODO: Handling the message
-	_ = ctx
+	// create a new scavenge from the data in the MsgSubmitScavenge message
+	var scavenge = types.Scavenge{
+		Index:        msg.SolutionHash,
+		Description:  msg.Description,
+		SolutionHash: msg.SolutionHash,
+		Reward:       msg.Reward,
+	}
+
+	// try getting a scavenge from the store using the solution hash as the key
+	_, isFound := k.GetScavenge(ctx, scavenge.SolutionHash)
+
+	// return an error if a scavenge already exists in the store
+	if isFound {
+		return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, "Scavenge with that solution hash already exists")
+	}
+
+	// get address of the Scavenge module account
+	moduleAcct := sdk.AccAddress(crypto.AddressHash([]byte(types.ModuleName)))
+
+	// convert the message creator address from a string into sdk.AccAddress
+	scavenger, err := sdk.AccAddressFromBech32(msg.Creator)
+	if err != nil {
+		panic(err)
+	}
+
+	// convert tokens from string into sdk.Coins
+	reward, err := sdk.ParseCoinsNormalized(scavenge.Reward)
+	if err != nil {
+		panic(err)
+	}
+
+	// send tokens from the scavenge creator to the module account
+	sdkError := k.bankKeeper.SendCoins(ctx, scavenger, moduleAcct, reward)
+	if sdkError != nil {
+		return nil, sdkError
+	}
 
+	// write the scavenge to the store
+	k.SetScavenge(ctx, scavenge)
 	return &types.MsgSubmitScavengeResponse{}, nil
 }

x/scavenge/types/expected_keepers.go

@@ -15,4 +15,5 @@ type AccountKeeper interface {
 type BankKeeper interface {
 	SpendableCoins(ctx sdk.Context, addr sdk.AccAddress) sdk.Coins
 	// Methods imported from bank should be defined here
+	SendCoins(ctx sdk.Context, fromAddr sdk.AccAddress, toAddr sdk.AccAddress, amt sdk.Coins) error
 }