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Interledger
Stefan Thomas
Chicago Payments Symposium
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2
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3
135 Team members ⅔ engineering talent
Our Experience Financial Services J.P. Morgan Citi Merrill Lynch BlackRock Visa Fiserv Paypal Prosper
Technology Google Apple Yahoo Bloomberg NASA
Regulat ion Federal Reserve SEC DTCC NSA
San Francisco | NYC | London | Sydney | Luxembourg
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Susan Athey Microsoft, Stanford
Donald Donahue DTCC
Michael B arr Dept. of Treasury
4
Karen Gifford NY Federal Reserve
Gene Sperling White House
Board & Advisors — Deep Industry Expertise
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Interledger The protocol for connecting ledgers.
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● White paper released in October 2015
● Open standard for connecting any type of ledger
● W3C Community Group with 220+ members
Interledger
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What are we trying to solve?
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Photo: UNAMID
The World Has Changed
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Payments Have Not
Photo by NASA
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Global from day one
On-demand fulfillment
Distributed suppliers and customers
Digitally native
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The New Corporate
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11
Internet of Things 50 Billion Connected Devices by 2020
2015 2010
12B
2020
15B
50B
Source: DHL and Cisco Internet of Things Trend Report, 2015; Cisco Internet of Things White Paper 2011
Consumers Will Make International Micropayments Without Even Thinking
The Consumer Space Is Changing Too
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High volume, low value, high velocity
On demand and real time
Complete visibility Value-added controls
The New Corporate’s Transaction Needs
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Low-Volum e High-Value Slow Bat ch Paym ent s
Today’s Infrastructure Designed for High Value Payments
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MONEY IS JUST DATA
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DATA?
SO WHY DOES IT NOT MOVE LIKE
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internetworking
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in·ter·net·work·ing
The interconnection of two or more networks so as to form a larger network.
noun
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Everywhere you want to be.
There are some things money can't buy. For everything else, there's MasterCard.
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is what matters.
REACH In global payments today,
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"… the fastest Internet provider in the nation …"
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"… with super- fast Internet …"
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"America's fastest, most consistent and most
reliable Internet."
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COST
SPEED In information networks, it 's all about
RELIABILITY SIMPLICITY
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"… biggest …"
"… more members …"
"… more services…"
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COST SPEED
Internetworking changes the game.
QUALITY REACH
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Payment Networks Are Disconnected
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Blockchain Banks Mobile Money Online Wallets
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Blockchain Banks Mobile Money Online Wallets
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Internetworking For Payment Networks
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How Does It Work?
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Transferring Funds Across Networks
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Sender Recipient Ledger Ledger
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Connectors Link Two Ledgers
Connector
Alice 100
Chloe 0
Chloe 110
Bob 0 100 110
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EUR USD
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Bilateral Connections Don't Scale
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Bilateral Connections Don't Scale
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O(n2)
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Networks Do Scale
34
O(n)
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But There Isn't Always A Direct Connection
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O(n)
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We Need Multiple Hops
36
O(n)
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TO:
us.wf.bob
First Step: Interledger Address
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Sender Attaches Packet to Local Transfer
Alice 100
Chloe 0
Chloe 110
Bob 0 100
38
us.wf.bob 1023.20
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Connector Forwards the Packet via Another Transfer
Alice 0
Chloe 100
Chloe 110
Bob 0
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110
us.wf.bob 1023.20
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If Connectors Fail, Would We Lose Money?
Alice 100
Chloe 0
Chloe 110
Bob 0
?
100
40
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Ledgers Provide Hold Functionality
Alice 100
On Hold 0
Chloe 0
Chloe 110
On Hold 0
Bob 0
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Holds Are Dependent on Conditions + Expiries
42
EXECUTE ROLLBACK
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Condition Fulfillment Executes Transfer
43
EXECUTE ROLLBACK
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Timeouts Cause Funds to Be Returned
44
EXECUTE ROLLBACK
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Sender Commits Funds To Initiate Payment
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Funds Are Committed From Left to Right
46
Alice 100
On Hold 0
Chloe 0
Chloe 110
On Hold 0
Bob 0
COMMITMENT
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Sender Puts Funds On Hold
Alice 100
On Hold 0
Chloe 0
Chloe 110
On Hold 0
Bob 0
100
47
us.wf.bob 1023.20
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Connector Gets Notification of Funds on Hold
Alice 0
On Hold 100
Chloe 0
Chloe 110
On Hold 0
Bob 0
48
?
us.wf.bob 1023.20
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Connector Puts Funds on Hold
Alice 0
On Hold 100
Chloe 0
Chloe 110
On Hold 0
Bob 0
49
110 ?
us.wf.bob 1023.20
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Recipient Gets Notification of Funds on Hold
Alice 0
On Hold 100
Chloe 0
Chloe 0
On Hold 110
Bob 0
50
? ?
us.wf.bob 1023.20
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Recipient Triggers Execution By Fulfilling the Condition
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Transfers Are Executed Right to Left
52
Alice 0
On Hold 100
Chloe 0
Chloe 0
On Hold 110
Bob 0
EXECUTION
? ?
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Recipient Signs Receipt
Alice 0
On Hold 100
Chloe 0
Chloe 0
On Hold 110
Bob 0
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? ?
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Signature Fulfills Condition, Ledger Releases Held Funds
Alice 0
On Hold 100
Chloe 0
Chloe 0
On Hold 110
Bob 0 110
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?
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How Does the Connector Get Reimbursed?
Alice 0
On Hold 100
Chloe 0
Chloe 0
On Hold 0
Bob 110
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?
?
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Connector is Notified That Funds Have Been Released
Alice 0
On Hold 100
Chloe 0
Chloe 0
On Hold 0
Bob 110
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?
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Connector Passes on the Recipient’s Signature
Alice 0
On Hold 100
Chloe 0
Chloe 0
On Hold 0
Bob 110
57
?
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Receipt Releases Funds from Hold
Alice 0
On Hold 100
Chloe 0
Chloe 0
On Hold 0
Bob 110
58
100
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Sender Gets Non- Repudiable Proof of Payment
Alice 0
On Hold 0
Chloe 100
Chloe 0
On Hold 0
Bob 110
59
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60
COMMITMENT
Transfers Are Committed L2R, Executed R2L
EXECUTION
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The Impact
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Before Internet: Dedicated Infrastructure
Phone
Telegraph
Pagers
TV
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Infrastructure Consolidation
Phone
Chat
TV
Internet
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Internet Architecture
IP
WIFI BLUETOOTH ETHERNET
Internetwork
Network
Transport TCP UDP
Application HTTP SMTP NNTP NTP RTP
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AUD BRL
CAD
EUR
Realtime Payments Require Capital
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Before Interledger: Dedicated Float
Corporates
Remittance
Retail
Banks
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Capital Consolidation
Interledger
Credit Cards
Corporates
Remittance
Banks
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Interledger Architecture
ILP
ISO 20022 BITCOIN ETHEREUM
Interledger
Ledger
Application SPSP PPSP ...
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ILP Cost Model (Example)
22.1
-29%
ILP
4.4
2.0
6.1
5.1
4.5
Current System
31.0
9.7
9.6
6.3
2.4
3.0
International Payment Infrastructure Costs (Representative Bank, Costs in $M USD)
Payment Processing Costs
Capital Cost of Treasury Float
Account Maintenance Costs
FX Costs
Currency Hedging Costs
Interest Opportunity Cost
Cash Management Costs (Rebalancing)
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The Internet: Cheaper Letters?
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The Internet: New Business Models
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Removing Fixed Costs
unviable viable viable
fixed cost
Transaction size
Cost
Transaction size
Cost
pre- internetworking fixed costs price out long- tail use cases
post- internetworking new business models
become possible
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Example: P2P Content
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Example: P2P Content
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Example: P2P Content
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Future Examples
Distributed Systems
Nano- Economies
Incremental Payments
Smart Contracts
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The Internet of Value is a game changer.