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Ken Anderson
Chief Developer Advocate
The Power of the Memo Field
What is all this “distributed

ledger technology” stuff about?
Storage?
Compute?
Trust
How do I get trust with Hedera?
Transaction
156
Option 1: Ask around
getReceipt
Receipt
getReceipt
Receipt
Option 1: Ask around
Transaction
+
createRecord
Option 2: State proofs
Option 2: State proofs
Option 2: State proofs
Option 2: State proofs
getRecord
Record
+
State Proof
Option 2: State proofs
Option 3: Ask yourself
New concept break…
Mirror networks
166
M
M
M
U
U
M
M
M
MM
M
M
M
M
M
M
M
M U
U
U
U
Hedera
Network
(Create Events)
Transaction
Option 3: Ask yourself
THE TRANSACTION
Transaction ID (Account ID + Timestamp)
Transaction Fee
Valid Duration
Record: Bool
Memo
Body
Node ID
THE TRANSACTION
Transaction ID (Account ID + Timestamp)
Transaction Fee
Valid Duration
Record: Bool
Memo
Body
Node ID
THE TRANSACTION
Transaction ID (Account ID + Timestamp)
Transaction Fee
Node ID
Valid Duration
Record: Bool
Memo
Body
(100 Bytes)
• SHA384 Hash
• Small text message
• Small encrypted message
LET’S GET CREATIVE
Micropayments
Extremely fast and cheap, but now I can include some logic in the
transaction if I know the interested party hosts a Mirror node.
LET’S GET CREATIVE
Micropayments
Extremely fast and cheap, but now I can include some logic in the
transaction if I know the interested party hosts a Mirror node.
Supply chain
Every party in the supply chain hosts a Mirror node. At every hand-off in
the supply chain process, the two parties sign and transmit a hash of the
process step as a very small cryptocurrency transaction and every Mirror
node host now becomes a witness of that hand-off.
LET’S GET CREATIVE
Micropayments
Extremely fast and cheap, but now I can include some logic in the
transaction if I know the interested party hosts a Mirror node.
Supply chain
Every party in the supply chain hosts a Mirror node. At every hand-off in
the supply chain process, the two parties sign and transmit a hash of the
process step as a very small cryptocurrency transaction and every Mirror
node host now becomes a witness of that hand-off.
Telecom
Each telco hosts a Mirror node. Reporting roaming

and remitting payment for usage can be near-real time.
What future will you build?

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The Power of the Memo Field | Hedera18