printed single use keys on creation and on use to figure out why they are broken

single/reception.go

@@ -108,5 +108,8 @@ func (m *Manager) processTransmission(msg format.Message,
 	c := NewContact(payload.GetRID(transmitMsg.GetPubKey(grp)),
 		transmitMsg.GetPubKey(grp), dhKey, payload.GetTagFP(), payload.GetMaxParts())
 
+	jww.INFO.Printf("generated by singe use receiver reception id for single use: %s, " +
+		"ephId: %d, pubkey: %x, msg: %s", c.partner, "unknown:", transmitMsg.GetPubKey(grp), msg)
+
 	return payload.GetContents(), c, nil
 }

single/transmission.go

@@ -289,5 +289,8 @@ func makeIDs(msg *transmitMessagePayload, publicKey *cyclic.Int,
 		jww.DEBUG.Printf("ephemeral.GetId(%s, %d, %d) = %d", rid, addressSize, timeNow.UnixNano(), ephID.Int64())
 	}
 
+	jww.INFO.Printf("generated by singe use sender reception id for single use: %s, " +
+		"ephId: %d, pubkey: %x, msg: %s", rid, ephID.Int64(), publicKey.Bytes(), msg)
+
 	return rid, ephID, nil
 }

single/transmitMessage.go

@@ -9,6 +9,7 @@ package single
 
 import (
 	"encoding/binary"
+	"fmt"
 	"github.com/pkg/errors"
 	jww "github.com/spf13/jwalterweatherman"
 	"gitlab.com/elixxir/crypto/cyclic"
@@ -246,3 +247,12 @@ func (mp transmitMessagePayload) SetContents(contents []byte) {
 
 	copy(mp.contents, contents)
 }
+
+
+// String returns the contents for printing adhering to the stringer interface.
+func (mp transmitMessagePayload) String()string {
+	return fmt.Sprintf("Data: %x [tagFP: %x, nonce: %x, " +
+		"maxParts: %x, size: %x, content: %x]", mp.data, mp.tagFP,
+		mp.nonce, mp.maxParts, mp.size, mp.contents)
+
+}