Merge #580: Update tumbler doc for the new schedule format

f2e100e fix sample schedule for testnet (Adam Gibson)
031b8f6 Update tumbler doc for the new schedule format (chris-belcher)

Tree-SHA512: c456863cfe4e18a81e4e769a6c28ef1b01c2a516332281cb7868cb2c7e7e9f62e0c566185911958803ca3c22ae03b764b4c2b3ac969fd47614d728cca15b88f3

docs/tumblerguide.md

@@ -11,7 +11,7 @@ This document explains the delta to the operation of that script, which is almos
 In this implementation, each coinjoin has an associated "schedule" of format like this:
 
 ```
-[mixdepth, amount-fraction, N-counterparties (requested), destination address, wait time in minutes, flag indicating incomplete/broadcast/completed (0/txid/1)]
+[mixdepth, amount-fraction, N-counterparties (requested), destination address, wait time in minutes, rounding, flag indicating incomplete/broadcast/completed (0/txid/1)]
 ```
 
 `[]` here represents a Python list. It's recorded in files in a csv format (because in some cases users may edit). See [this](https://github.com/AdamISZ/joinmarket-clientserver/blob/master/scripts/sample-schedule-for-testnet) testnet sample given in the repo. A couple of extra notes on the format:
@@ -22,6 +22,8 @@ In this implementation, each coinjoin has an associated "schedule" of format lik
 
 * 0 amounts for the second entry indicate, as for command line flags, a sweep; decimals indicate mixdepth fractions (for tumbler)
 
+* the 6th entry, `rounding`, is how many significant figures to round the coinjoin amount to. For example a rounding of `2` means that `0.12498733` will be rounded to `0.1200000`. A rounding value of `16` means no rounding. Sweep coinjoin amounts are never rounded.
+
 For the `sendpayment.py` script, this schedule can indeed be simply written in a file and passed as a parameter (for this reason it's likely the tumbler and sendpayment scripts can merge in future).
 
 As you can imagine, the idea for the `tumbler.py` script is simply that a tumbler *schedule* is generated, according to the same algorithm that was used in the original implementation ([code](https://github.com/AdamISZ/joinmarket-clientserver/blob/master/jmclient/jmclient/schedule.py#L61-L133)), however here it is persisted - see the next section.

scripts/sample-schedule-for-testnet

@@ -19,9 +19,12 @@
 # in the tumbler, to prompt the user for a new address.
 #index 4: waittime: a decimal value in minutes to wait, after confirmation of this
 # transaction, before continuing to the next.
-#index 5: completion flag: 0 until the transaction is seen on the network, when it
+#index 5: rounding: how many significant figures to round the coinjoin amount to.
+# For example a rounding of `2` means that `0.12498733` will be rounded to `0.1200000`.
+# A rounding value of `16` means no rounding. Sweep coinjoin amounts are never rounded.
+#index 6: completion flag: 0 until the transaction is seen on the network, when it
 # is changed to the txid. This is particularly useful for the `--restart` feature
 # of tumbler. Then changes to 1 when tx is confirmed.
 #==========================
-1, 110000000, 3, INTERNAL, 0.8, 0
-0, 20000000, 2, mnsquzxrHXpFsZeL42qwbKdCP2y1esN3qw, 0, 0
+1, 110000000, 3, INTERNAL, 0.8, 16, 0
+0, 20000011, 2, mnsquzxrHXpFsZeL42qwbKdCP2y1esN3qw, 0, 16, 0