Exemple de session (notation en octets) ​

# Authentication (once per connection)
server → "SHA-256 aB3dEf_g" \n
client → base64url( SHA-256( token ∥ "aB3dEf_g" ) ) \n

# Immediate acquire: wait=5s, lease=30s, key="order-1234"
client → 'A' 05 1E ⟨owner=7⟩ "order-1234" \n
server → 'A' ⟨token=1⟩ ⟨owner=7⟩ "order-1234" \n

# A different connection waits for the held key: wait=1s
client2 → 'A' 01 1E ⟨owner=9⟩ "order-1234" \n
                                      ... pending ...
# Release hands the key directly to the FIFO head with a new token
client  → 'R' ⟨token=1⟩ "order-1234" \n
server  → 'R' ⟨token=1⟩ "order-1234" \n
server  → 'A' ⟨token=2⟩ ⟨owner=9⟩ "order-1234" \n
# Or, when wait expires without a grant
server  → 'T' ⟨owner=9⟩ "order-1234" \n

# Response lost after an acquire may have been sent
client → 'A' 05 1E ⟨owner=10⟩ "payment-42" \n
connection closed                         # Indeterminate; do not resend A with owner=10

# Capacity rejection proves non-acquisition; no internal retry
client3 → 'A' 05 1E ⟨owner=11⟩ "order-1234" \n
server  → 'B' ⟨owner=11⟩ "order-1234" \n

# Exact-token release mismatch and malformed request
client → 'R' ⟨token=1⟩ "order-1234" \n
server → 'N' ⟨token=1⟩ "order-1234" \n
client → 'Z' ...
server → 'E' "bad_op" \n
connection closed

# Request sent to a non-leader
client → 'A' 05 1E ⟨owner=13⟩ "order-1234" \n
server → 'M' "10.0.0.1:5225" \n
connection closed                         # sent acquire is Indeterminate; M has no owner

# Server-initiated leader notice; this connection stays open
server → 'L' "10.0.0.2:5225" \n