SEP-23: Propose {ed25519}{id} for look-a-like G and M addresses

ecosystem/sep-0023.md

@@ -3,10 +3,12 @@
 ```
 SEP: 0023
 Title: Augmented strkey format for multiplexed accounts
-Author: David Mazières and Tomer Weller
+Author: David Mazières, Tomer Weller <@tomerweller>, Leigh McCulloch <@leighmcculloch>, Alfonso Acosta <@2opremio>
 Track: Standard
 Status: Draft
 Created: 2019-09-16
+Updated: 2021-03-25
+Version: 0.0.2
 Discussion: https://groups.google.com/forum/#!forum/stellar-dev
 ```
 
@@ -75,10 +77,10 @@ The following steps transform a binary key into a strkey:
 1.  Start with the appropriate version byte computed by the OR of a
     key type base value and algorithm selector from the tables above.
 
-2.  If we are encoding a multiplexed address, append an 8-byte memo ID
-    in network byte order (most significant byte first).
+2.  Append the binary bytes of the key (e.g., 32-bytes for ED25519).
 
-3.  Append the binary bytes of the key (e.g., 32-bytes for ED25519).
+3.  If we are encoding a multiplexed address, append an 8-byte memo ID
+    in network byte order (most significant byte first).
 
 4.  Compute a 16-bit CRC16 checksum of the combined version byte,
     optional memo ID, and binary key (using polynomial
@@ -119,12 +121,12 @@ accounts in a backwards-compatible way:
    - Base field name + `_muxed_id` is the integer.
 
     For example, given the MuxedAccount
-    `MAAAAAAAAAAAJURAAB2X52XFQP6FBXLGT6LWOOWMEXWHEWBDVRZ7V5WH34Y22MPFBHUHY`,
+   `MAQAA5L65LSYH7CQ3VTJ7F3HHLGCL3DSLAR2Y47263D56MNNGHSQSAAAAAAAAAAE2LP26`,
     you might get the following fields:
 
     ~~~
         source_account: GAQAA5L65LSYH7CQ3VTJ7F3HHLGCL3DSLAR2Y47263D56MNNGHSQSTVY
-        source_account_muxed: MAAAAAAAAAAAJURAAB2X52XFQP6FBXLGT6LWOOWMEXWHEWBDVRZ7V5WH34Y22MPFBHUHY
+        source_account_muxed: MAQAA5L65LSYH7CQ3VTJ7F3HHLGCL3DSLAR2Y47263D56MNNGHSQSAAAAAAAAAAE2LP26
         source_account_muxed_id: 1234
     ~~~~
 
@@ -169,7 +171,7 @@ test cases, which could in turn cause security problems.
 
 1. Valid multiplexed account
 
-    - Strkey: `MAAAAAAAAAAAAAB7BQ2L7E5NBWMXDUCMZSIPOBKRDSBYVLMXGSSKF6YNPIB7Y77ITLVL6`
+    - Strkey: `MA7QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJUAAAAAAAAAAAACJUQ`
     - type: `KEY_TYPE_MUXED_ED25519`
     - id: 0
     - ed25519: `GA7QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJVSGZ`
@@ -188,7 +190,7 @@ test cases, which could in turn cause security problems.
 1. Valid multiplexed account in which unsigned id exceeds maximum
    signed 64-bit integer
 
-    - Strkey: `MCAAAAAAAAAAAAB7BQ2L7E5NBWMXDUCMZSIPOBKRDSBYVLMXGSSKF6YNPIB7Y77ITKNOG`
+    - Strkey: `MA7QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJVAAAAAAAAAAAAAJLK`
     - type: `KEY_TYPE_MUXED_ED25519`
     - id: 9223372036854775808
     - ed25519: `GA7QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJVSGZ`
@@ -212,7 +214,7 @@ test cases, which could in turn cause security problems.
 
 1. The unused trailing bit must be zero in the encoding of the last
    three bytes (24 bits) as five base-32 symbols (25 bits)
-    - Strkey: `MAAAAAAAAAAAAAB7BQ2L7E5NBWMXDUCMZSIPOBKRDSBYVLMXGSSKF6YNPIB7Y77ITLVL7`
+    - Strkey: `MA7QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJUAAAAAAAAAAAACJUR`
 
 1. Invalid length (congruent to 1 mod 8)
     - Strkey: `GA7QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJVSGZA`
@@ -224,36 +226,36 @@ test cases, which could in turn cause security problems.
     - Strkey: `G47QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJVP2I`
 
 1. Invalid length (congruent to 6 mod 8)
-    - Strkey: `MCAAAAAAAAAAAAB7BQ2L7E5NBWMXDUCMZSIPOBKRDSBYVLMXGSSKF6YNPIB7Y77ITKNOGA`
+    - Strkey: `MA7QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJVAAAAAAAAAAAAAJLKA`
 
 1. Invalid length (base-32 decoding should yield 43 bytes, not 44)
-    - Strkey: `MAAAAAAAAAAAAAB7BQ2L7E5NBWMXDUCMZSIPOBKRDSBYVLMXGSSKF6YNPIB7Y77ITIADJPA`
+    - Strkey: `MA7QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJVAAAAAAAAAAAAAAV75I`
 
 1. Invalid algorithm (low 3 bits of version byte are 7)
-    - Strkey: `M4AAAAAAAAAAAAB7BQ2L7E5NBWMXDUCMZSIPOBKRDSBYVLMXGSSKF6YNPIB7Y77ITIU2K`
+    - Strkey: `M47QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJUAAAAAAAAAAAACJUQ`
 
 1. Padding bytes are not allowed
-    - Strkey: `MAAAAAAAAAAAAAB7BQ2L7E5NBWMXDUCMZSIPOBKRDSBYVLMXGSSKF6YNPIB7Y77ITLVL6===`
+    - Strkey: `MA7QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJUAAAAAAAAAAAACJUK===`
 
 1. Invalid checksum
     - Strkey:
-      `MAAAAAAAAAAAAAB7BQ2L7E5NBWMXDUCMZSIPOBKRDSBYVLMXGSSKF6YNPIB7Y77ITLVL4`
+      `MA7QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJUAAAAAAAAAAAACJUO`
 
 You can paste these invalid strkeys more conveniently into a unit test
 using the following array:
 
 ~~~ {.c}
 {
     "GAAAAAAAACGC6",
-    "MAAAAAAAAAAAAAB7BQ2L7E5NBWMXDUCMZSIPOBKRDSBYVLMXGSSKF6YNPIB7Y77ITLVL7",
+    "MA7QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJUAAAAAAAAAAAACJUR",
     "GA7QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJVSGZA",
     "GA7QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJUACUSI",
     "G47QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJVP2I",
-    "MCAAAAAAAAAAAAB7BQ2L7E5NBWMXDUCMZSIPOBKRDSBYVLMXGSSKF6YNPIB7Y77ITKNOGA",
-    "MAAAAAAAAAAAAAB7BQ2L7E5NBWMXDUCMZSIPOBKRDSBYVLMXGSSKF6YNPIB7Y77ITIADJPA",
-    "M4AAAAAAAAAAAAB7BQ2L7E5NBWMXDUCMZSIPOBKRDSBYVLMXGSSKF6YNPIB7Y77ITIU2K",
-    "MAAAAAAAAAAAAAB7BQ2L7E5NBWMXDUCMZSIPOBKRDSBYVLMXGSSKF6YNPIB7Y77ITLVL6===",
-    "MAAAAAAAAAAAAAB7BQ2L7E5NBWMXDUCMZSIPOBKRDSBYVLMXGSSKF6YNPIB7Y77ITLVL4",
+    "MA7QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJVAAAAAAAAAAAAAJLKA",
+    "MA7QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJVAAAAAAAAAAAAAAV75I",
+    "M47QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJUAAAAAAAAAAAACJUQ",
+    "MA7QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJUAAAAAAAAAAAACJUK===",
+    "MA7QYNF7SOWQ3GLR2BGMZEHXAVIRZA4KVWLTJJFC7MGXUA74P7UJUAAAAAAAAAAAACJUO",
 }
 ~~~