added logic to request-loan message server

x/loan/keeper/msg_server_request_loan.go

@@ -11,8 +11,26 @@ import (
 func (k msgServer) RequestLoan(goCtx context.Context, msg *types.MsgRequestLoan) (*types.MsgRequestLoanResponse, error) {
 	ctx := sdk.UnwrapSDKContext(goCtx)
 
-	// TODO: Handling the message
-	_ = ctx
-
+	var loan = types.Loan{
+		Amount: msg.Amount,
+		Fee: msg.Fee,
+		Collateral: msg.Collateral,
+		Deadline: msg.Deadline,
+		Borrower: msg.Creator,
+		State: "requested",
+	}
+	borrower, err := sdk.AccAddressFromBech32(msg.Creator)
+	if err != nil {
+		panic(err)
+	}
+	collateral, err := sdk.ParseCoinsNormalized(loan.Collateral)
+	if err != nil {
+		panic(err)
+	}
+	sdkError := k.bankKeeper.SendCoinsFromAccountToModule(ctx, borrower, types.ModuleName, collateral)
+	if sdkError != nil{
+		return nil, sdkError
+	}
+	k.AppendLoan(ctx, loan)
 	return &types.MsgRequestLoanResponse{}, nil
 }

x/loan/types/message_request_loan.go

@@ -1,6 +1,8 @@
 package types
 
 import (
+	"strconv"
+
 	errorsmod "cosmossdk.io/errors"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
@@ -23,5 +25,30 @@ func (msg *MsgRequestLoan) ValidateBasic() error {
 	if err != nil {
 		return errorsmod.Wrapf(sdkerrors.ErrInvalidAddress, "invalid creator address (%s)", err)
 	}
+	amount, _ := sdk.ParseCoinsNormalized(msg.Amount)
+	if !amount.IsValid(){
+		return errorsmod.Wrap(sdkerrors.ErrInvalidRequest, "amount is not a valid Coins object")
+	}
+	if amount.Empty(){
+		return errorsmod.Wrap(sdkerrors.ErrInvalidRequest, "amount is empty")
+	}
+	fee, _ := sdk.ParseCoinsNormalized(msg.Fee)
+	if !fee.IsValid(){
+		return errorsmod.Wrap(sdkerrors.ErrInvalidRequest, "fee is not a valid Coins object")
+	}
+	deadline, err := strconv.ParseInt(msg.Deadline, 10, 64)
+	if err != nil{
+		return errorsmod.Wrap(sdkerrors.ErrInvalidRequest, "deadline is not an integer")
+	}
+	if deadline <= 0{
+		return errorsmod.Wrap(sdkerrors.ErrInvalidRequest, "deadline should be positive integer")
+	}
+	collateral, _ := sdk.ParseCoinsNormalized(msg.Collateral)
+	if !collateral.IsValid(){
+		return errorsmod.Wrap(sdkerrors.ErrInvalidRequest, "collateral is not a valid Coins object")
+	}
+	if collateral.Empty(){
+		return errorsmod.Wrap(sdkerrors.ErrInvalidRequest, "collateral is empty")
+	}
 	return nil
 }