Keri agent crashes when one or more witness receipts are missing

[psteniusubi]

Steps to reproduce

1. Reset
2. Do not start witness
3. Start Keri agent
4. Run boot, unlock, incept
5. Running GET /oobi/alias causes Keri agent to crash

This also happens if I start only two witness nodes (eg. only was and wel witnesses). Or if witness nodes are "slow" and GET /oobi/alias happens before receipts are received.

keripy is at revision ed016a06c56a1faaff26f2cca24b8b9e385ffc54

$ rm -rf ~/.keri

$ kli agent vlei & 

$ curl -s -X POST "http://localhost:5620/boot" -H "accept: */*" -H "Content-Type: application/json" -d "{\"name\":\"alias1\",\"passcode\":\"DoB2-6Fj4x-9Lbo-AFWJr-a17O\",\"salt\":\"0ACDEyMzQ1Njc4OWxtbm9aBc\"}" | jq

$ curl -s -X PUT "http://localhost:5620/boot" -H "accept: */*" -H "Content-Type: application/json" -d "{\"name\":\"alias1\",\"passcode\":\"DoB2-6Fj4x-9Lbo-AFWJr-a17O\"}" | jq

$ sleep 3

$ curl -s -X POST "http://localhost:5620/ids/alias1" -H "accept: */*" -H "Content-Type: application/json" -d "{\"transferable\":true,\"wits\":[\"BBilc4-L3tFUnfM_wJr4S4OJanAv_VmF_dJNN6vkf2Ha\",\"BLskRTInXnMxWaGqcpSyMgo0nYbalW99cGZESrz3zapM\",\"BIKKuvBwpmDVA4Ds-EpL5bt9OqPzWPja2LigFYZN2YfX\"],\"toad\":2,\"icount\":1,\"ncount\":1,\"isith\":1,\"nsith\":1}" | jq

$ curl -i -s "http://localhost:5620/oobi/alias1?role=witness" -H "accept: */*"

Keri agent quits, output and stack trace is

$ kli agent vlei

******* Starting Agents for vLEI scenairo testing on ports:

    RootGARs:  5620, 5621
    ExtGARs:   5622, 5623
    IntGARs:   5624, 5625
    QARs:      5626, 5627
    LARs:      5628, 5629
    Person:    5630

*******

ERR: 'http'
Traceback (most recent call last):
  File "/home/uroot/.local/bin/kli", line 33, in <module>
    sys.exit(load_entry_point('keri', 'console_scripts', 'kli')())
  File "/home/uroot/keripy/src/keri/app/cli/kli.py", line 27, in main
    raise ex
  File "/home/uroot/keripy/src/keri/app/cli/kli.py", line 22, in main
    directing.runController(doers=doers, expire=0.0)
  File "/home/uroot/keripy/src/keri/app/directing.py", line 728, in runController
    doist.do(doers=doers)
  File "/home/uroot/.local/lib/python3.10/site-packages/hio/base/doing.py", line 156, in do
    self.recur()  # increments .tyme runs recur context
  File "/home/uroot/.local/lib/python3.10/site-packages/hio/base/doing.py", line 275, in recur
    tock = dog.send(self.tyme)  # yielded tock == 0.0 means re-run asap
  File "/home/uroot/.local/lib/python3.10/site-packages/hio/base/doing.py", line 922, in do
    self.done = self.recur(tyme=tyme)  # equv of doist.recur
  File "/home/uroot/.local/lib/python3.10/site-packages/hio/base/doing.py", line 1026, in recur
    tock = dog.send(tyme)  # yielded tock == 0.0 means re-run asap
  File "/home/uroot/.local/lib/python3.10/site-packages/hio/base/doing.py", line 922, in do
    self.done = self.recur(tyme=tyme)  # equv of doist.recur
  File "/home/uroot/.local/lib/python3.10/site-packages/hio/base/doing.py", line 1026, in recur
    tock = dog.send(tyme)  # yielded tock == 0.0 means re-run asap
  File "/home/uroot/.local/lib/python3.10/site-packages/hio/base/doing.py", line 922, in do
    self.done = self.recur(tyme=tyme)  # equv of doist.recur
  File "/home/uroot/.local/lib/python3.10/site-packages/hio/base/doing.py", line 1026, in recur
    tock = dog.send(tyme)  # yielded tock == 0.0 means re-run asap
  File "/home/uroot/keripy/src/keri/app/indirecting.py", line 786, in eventDo
    client, clientDoer = agenting.httpClient(self.hab, self.witness)
  File "/home/uroot/keripy/src/keri/app/agenting.py", line 598, in httpClient
    up = urlparse(urls[kering.Schemes.http])
KeyError: 'http'

Suggestion

GET /oobi/alias should return oobi uri list with those witnesses whose receipts have been received. List may initially be empty or shorter than configured number of witnesses.

[pfeairheller]

Agent removed from KERIpy for WebOfTrust/KERIA