diff --git a/gql/resolver_mpool.go b/gql/resolver_mpool.go
index 9860ffed0..7e2db36f8 100644
--- a/gql/resolver_mpool.go
+++ b/gql/resolver_mpool.go
@@ -4,17 +4,16 @@ import (
 	"bytes"
 	"context"
 	"encoding/json"
-	"errors"
 	"fmt"
+	"reflect"
 
 	"github.com/filecoin-project/lotus/chain/consensus"
+	cbg "github.com/whyrusleeping/cbor-gen"
 
 	gqltypes "github.com/filecoin-project/boost/gql/types"
 	"github.com/filecoin-project/go-address"
 	"github.com/filecoin-project/go-state-types/abi"
-	stbig "github.com/filecoin-project/go-state-types/big"
 	"github.com/filecoin-project/lotus/chain/types"
-	"github.com/filecoin-project/specs-actors/actors/builtin/multisig"
 )
 
 type msg struct {
@@ -65,22 +64,24 @@ func (r *resolver) Mpool(ctx context.Context, args struct{ Local bool }) ([]*msg
 			}
 		}
 
-		method := m.Message.Method.String()
+		var params string
+		methodName := m.Message.Method.String()
 		toact, err := r.fullNode.StateGetActor(ctx, m.Message.To, types.EmptyTSK)
 		if err == nil {
-			method = consensus.NewActorRegistry().Methods[toact.Code][m.Message.Method].Name
-		}
-
-		var params string
-		paramsMsg, err := messageFromBytes(m.Message.Params)
-		if err != nil {
-			params = err.Error()
-		} else {
-			paramsBytes, err := json.MarshalIndent(paramsMsg, "", "  ")
-			if err != nil {
-				params = err.Error()
-			} else {
-				params = string(paramsBytes)
+			method, ok := consensus.NewActorRegistry().Methods[toact.Code][m.Message.Method]
+			if ok {
+				methodName = method.Name
+
+				params = string(m.Message.Params)
+				p, ok := reflect.New(method.Params.Elem()).Interface().(cbg.CBORUnmarshaler)
+				if ok {
+					if err := p.UnmarshalCBOR(bytes.NewReader(m.Message.Params)); err == nil {
+						b, err := json.MarshalIndent(p, "", "  ")
+						if err == nil {
+							params = string(b)
+						}
+					}
+				}
 			}
 		}
 
@@ -92,7 +93,7 @@ func (r *resolver) Mpool(ctx context.Context, args struct{ Local bool }) ([]*msg
 			GasFeeCap:  gqltypes.BigInt{Int: m.Message.GasFeeCap},
 			GasLimit:   gqltypes.Uint64(uint64(m.Message.GasLimit)),
 			GasPremium: gqltypes.BigInt{Int: m.Message.GasPremium},
-			Method:     method,
+			Method:     methodName,
 			Params:     params,
 			BaseFee:    gqltypes.BigInt{Int: baseFee},
 		})
@@ -101,83 +102,6 @@ func (r *resolver) Mpool(ctx context.Context, args struct{ Local bool }) ([]*msg
 	return gqlmsgs, nil
 }
 
-func messageFromBytes(msgb []byte) (types.ChainMsg, error) {
-	// Signed
-	{
-		var msg types.SignedMessage
-		if err := msg.UnmarshalCBOR(bytes.NewReader(msgb)); err == nil {
-			return &msg, nil
-		}
-	}
-
-	// Unsigned
-	{
-		var msg types.Message
-		if err := msg.UnmarshalCBOR(bytes.NewReader(msgb)); err == nil {
-			return &msg, nil
-		}
-	}
-
-	// Multisig propose?
-	{
-		var pp multisig.ProposeParams
-		if err := pp.UnmarshalCBOR(bytes.NewReader(msgb)); err == nil {
-			i, err := address.NewIDAddress(0)
-			if err != nil {
-				return nil, err
-			}
-
-			return &types.Message{
-				// Hack(-ish)
-				Version: 0x6d736967,
-				From:    i,
-
-				To:    pp.To,
-				Value: pp.Value,
-
-				Method: pp.Method,
-				Params: pp.Params,
-
-				GasFeeCap:  stbig.Zero(),
-				GasPremium: stbig.Zero(),
-			}, nil
-		}
-	}
-
-	// Encoded json???
-	{
-		if msg, err := messageFromJson(msgb); err == nil {
-			return msg, nil
-		}
-	}
-
-	return nil, errors.New("probably not a cbor-serialized message")
-}
-
-func messageFromJson(msgb []byte) (types.ChainMsg, error) {
-	// Unsigned
-	{
-		var msg types.Message
-		if err := json.Unmarshal(msgb, &msg); err == nil {
-			if msg.To != address.Undef {
-				return &msg, nil
-			}
-		}
-	}
-
-	// Signed
-	{
-		var msg types.SignedMessage
-		if err := json.Unmarshal(msgb, &msg); err == nil {
-			if msg.Message.To != address.Undef {
-				return &msg, nil
-			}
-		}
-	}
-
-	return nil, errors.New("probably not a json-serialized message")
-}
-
 func mockMessages() []*types.SignedMessage {
 	to0, _ := address.NewFromString("f01469945")
 	from0, _ := address.NewFromString("f3uakndzne4lorwykinlitx2d2puuhgburvxw4dpkfskeofmzg33pm7okyzikqe2gzvaqj2k3hpunwayij6haa")
diff --git a/react/src/Mpool.css b/react/src/Mpool.css
index 588ec5427..2a30e787e 100644
--- a/react/src/Mpool.css
+++ b/react/src/Mpool.css
@@ -117,4 +117,19 @@
     left: 1.5em;
     border-left: 1px solid #000;
     height: 0.5em;
+}
+
+.mpool .params{
+    width: 1080px;
+    text-overflow: ellipsis;
+    cursor: pointer;
+    word-break: break-all;
+    overflow: hidden;
+    white-space: nowrap;
+}
+
+.mpool .params:hover{
+    overflow: visible;
+    white-space: normal;
+    width: auto;
 }
\ No newline at end of file
diff --git a/react/src/Mpool.js b/react/src/Mpool.js
index 89950b346..c7b609afe 100644
--- a/react/src/Mpool.js
+++ b/react/src/Mpool.js
@@ -67,7 +67,9 @@ function MpoolMessage(props) {
         </tr>
         <tr key={i+"params"}>
             <td>Params</td>
-            <td>{msg.Params}</td>
+            <td>
+                <div className="params">{msg.Params}</div>
+            </td>
         </tr>
         <tr key={i+"gas-fee-cap"}>
             <td>Gas Fee Cap</td>