Here is what i whipped up: margaret-dump.go

$ go run margaret-dump.go ali/log


Message00: %ULwTkUWOON5exNLOIRrWvgdzr1zp468GO/jwwc8M1xM=.sha256
Author: @QbIo3kW+NGR8+WeOA885s4nE1myVgLCevPnHJ7SRe84=.ed25519
Content: {
    "type": "contact",
    "contact": "@ZRGveyyvEoNkIhKeQ4i5KTO0PMlr6jc4ZBPNl+xMgxc=.ggfeed-v1",
    "following": true,
    "blocking": false
  }
Not a gabby message, skipping...


Message01: %2vSMZwV/t2ZsmSW7RhOlYkcZIadNys0d1Ds7sOHJzuw=.ggmsg-v1
Author: @ZRGveyyvEoNkIhKeQ4i5KTO0PMlr6jc4ZBPNl+xMgxc=.ggfeed-v1
Content: {"type":"contact","contact":"@QbIo3kW+NGR8+WeOA885s4nE1myVgLCevPnHJ7SRe84=.ed25519","following":true,"blocking":false}

evt bytes: 85f6d9041a5821016511af7b2caf12836422129e4388b92933b43cc96bea37386413cd97ec4c8317011a5e037ac883d9041a582103d5b6b1d5e9d3bb3e6d9296243a4122f9eeddd94ee32b52178e4f714e4c0d0808187701


Message02: %Gs0JO2iZb5o85fyY6M7BZhreZh2diCYgVMcMUqzNMrM=.ggmsg-v1
Author: @ZRGveyyvEoNkIhKeQ4i5KTO0PMlr6jc4ZBPNl+xMgxc=.ggfeed-v1
Content: {"test":0}

evt bytes: 85d9041a582102daf48c67057fb7666c9925bb4613a562471921a74dcacd1dd43b3bb0e1c9ceecd9041a5821016511af7b2caf12836422129e4388b92933b43cc96bea37386413cd97ec4c8317021a5e037ac883d9041a582103d0e907167db37c1164d2035c0eaa99dbf63209f3c903dcd96a54900db2b0dc6c0b01



$ go run margaret-dump.go bob/log

Message00: %2vSMZwV/t2ZsmSW7RhOlYkcZIadNys0d1Ds7sOHJzuw=.ggmsg-v1
Author: @ZRGveyyvEoNkIhKeQ4i5KTO0PMlr6jc4ZBPNl+xMgxc=.ggfeed-v1
Content: {"type":"contact","contact":"@QbIo3kW+NGR8+WeOA885s4nE1myVgLCevPnHJ7SRe84=.ed25519","following":true,"blocking":false}

evt bytes: 85f6d9041a5821016511af7b2caf12836422129e4388b92933b43cc96bea37386413cd97ec4c8317011a5e037ac883d9041a582103d5b6b1d5e9d3bb3e6d9296243a4122f9eeddd94ee32b52178e4f714e4c0d0808187701


Message01: %Gs0JO2iZb5o85fyY6M7BZhreZh2diCYgVMcMUqzNMrM=.ggmsg-v1
Author: @ZRGveyyvEoNkIhKeQ4i5KTO0PMlr6jc4ZBPNl+xMgxc=.ggfeed-v1
Content: {"test":0}

evt bytes: 85d9041a582102daf48c67057fb7666c9925bb4613a562471921a74dcacd1dd43b3bb0e1c9ceecd9041a5821016511af7b2caf12836422129e4388b92933b43cc96bea37386413cd97ec4c8317021a5e037ac883d9041a582103d0e907167db37c1164d2035c0eaa99dbf63209f3c903dcd96a54900db2b0dc6c0b01


Message02: %ELXSS7J4KCAvSxbI2tjBnB4/iT5OAVyZwTa9B1DOjrk=.ggmsg-v1
Author: @ZRGveyyvEoNkIhKeQ4i5KTO0PMlr6jc4ZBPNl+xMgxc=.ggfeed-v1
Content: {"test":1}

evt bytes: 85d9041a5821021acd093b68996f9a3ce5fc98e8cec1661ade661d9d88262054c70c52accd32b3d9041a5821016511af7b2caf12836422129e4388b92933b43cc96bea37386413cd97ec4c8317031a5e037ac883d9041a58210376ee56ae9188eecf6269efd1d512d2fb3711524325959737507ea87047355a640b01

again, if you throw the evtBytes into the diag tools you get a nice run down of what is what:

85                                      # array(5)
   D9 041A                              # tag(1050)
      58 21                             # bytes(33)
         021ACD093B68996F9A3CE5FC98E8CEC1661ADE661D9D88262054C70C52ACCD32B3
   D9 041A                              # tag(1050)
      58 21                             # bytes(33)
         016511AF7B2CAF12836422129E4388B92933B43CC96BEA37386413CD97EC4C8317
   03                                   # unsigned(3)
   1A 5E037AC8                          # unsigned(1577286344)
   83                                   # array(3)
      D9 041A                           # tag(1050)
         58 21                          # bytes(33)
            0376EE56AE9188EECF6269EFD1D512D2FB3711524325959737507EA87047355A64 
      0B                                # unsigned(11)
      01                                # unsigned(1)