Wrote to or replied to

Mike Hearn

Also appears as mike@plan99.net

Mike Hearn corresponded with Satoshi from April 2009 through April 2011. The published Hearn threads include deep protocol questions, software design digressions and some of Satoshi's last known lines, including the note that Bitcoin was in good hands with Gavin and everyone. After Satoshi left, Hearn wrote BitcoinJ, the widely used Java library that helped Android and server-side wallets talk to the network.

He worked on payment channels and commercial Bitcoin infrastructure, including time at Google and later at startups around Bitcoin and blockchain tooling. In early 2016, after the block size fights, he publicly left Bitcoin in a widely read farewell post that called the experiment a failure. Supporters of larger blocks saw a developer who had warned about capacity for years. Critics saw a premature eulogy. Either way, the exit is part of Bitcoin's political history.

He remains essential reading for Satoshi's late voice and for the first large civil war over how Bitcoin should scale. This archive keeps the Satoshi-era correspondence and names the 2016 exit honestly, without using Hearn's later verdict as a substitute for the primary emails. The emails remain the reason he belongs in a Satoshi archive first. That later public record is why the name still draws readers to this archive page.

Did Satoshi Nakamoto talk to Mike Hearn?

Yes. This archive has 16 published emails from Satoshi involving Mike Hearn, dated from 12 April 2009 to 23 April 2011.

16 published emails · no quoted or named replies · 12 April 2009 to 23 April 2011

Sources

Mike Hearn on Bitcoin Takeover

In this archive (16)

Published email · Private email (Mike Hearn)

Questions about BitCoin
12 April 2009, 22:44 (time as published; timezone not given)
Published email · Private email (Mike Hearn)

Questions about BitCoin
13 April 2009, 23:00 (time as published; timezone not given)
Published email · Private email (Mike Hearn)

Questions about BitCoin
13 April 2009, 23:11 (time as published; timezone not given)
Published email · Private email (Mike Hearn)

Questions about BitCoin
14 April 2009, 19:41 (time as published; timezone not given)
Published email · Private email (Mike Hearn)

Questions about BitCoin
18 April 2009, 18:16 (time as published; timezone not given)
Published email · Private email (Mike Hearn)

Questions about BitCoin
18 April 2009, 22:52 (time as published; timezone not given)
Published email · Private email (Mike Hearn)

Questions about BitCoin
19 April 2009, 02:14 (time as published; timezone not given)
Published email · Private email (Mike Hearn)

Lack of chargeback support
27 April 2009, 00:11 (time as published; timezone not given)
Published email · Private email (Mike Hearn)

More BitCoin questions
29 December 2010, 22:42 (time as published; timezone not given)
Published email · Private email (Mike Hearn)

More BitCoin questions
7 January 2011, 13:00 (time as published; timezone not given)
Published email · Private email (Mike Hearn)

More BitCoin questions
10 January 2011, 16:34 (time as published; timezone not given)
Published email · Private email (Mike Hearn)

More BitCoin questions
10 January 2011, 20:47 (time as published; timezone not given)
Published email · Private email (Mike Hearn)

Open sourced my Java SPV impl
9 March 2011, 17:15 (time as published; timezone not given)
Published email · Private email (Mike Hearn)

Open sourced my Java SPV impl
9 March 2011, 19:39 (time as published; timezone not given)
Published email · Private email (Mike Hearn)

Holding coins in an unspendable state for a rolling time window
20 April 2011, 11:39 (time as published; timezone not given)
Published email · Private email (Mike Hearn)

Holding coins in an unspendable state for a rolling time window
23 April 2011, 15:40 (time as published; timezone not given)

All people in the archive · Satoshi-era timeline