[api-v3-bug] Operations do not appear atomic. Retries should not be so necessary

[brianddk]

Normally, most REST operations are rather atomic. When an asset is bought, the balance should update, when sold, the balance should decrement. This is not the case for many endpoints. Order fills and order opens take a finite amount of time to propagate to the underlying wallet.

pyexch/examples/coinbase_dca.py

Lines 152 to 155 in b52d941

	while abs(balance - target) > 1 and balance < target:
	sleep(1)
	print(f"Waiting: balance={balance:.2f}, target={target:.2f}")
	balance = get_balance(cbv3, account_id)

Whats worse, even orders placed will disappear when read back, requiring retries to verify that placed orders are placed.

pyexch/examples/coinbase_dca.py

Lines 222 to 231 in b52d941

	if resp["success"]:
	for i in range(retry):
	try:
	resp = cbv3.v3_client.get_order(resp["order_id"])
	except Exception:
	print("retrying")
	sleep(1)
	continue
	if resp["order"]:
	break