Use Case: Lottery
-----------------
A lottery where the highest ticket "value" in a given time period will be rewarded the AT's balance. A ticket
is expected to be the hash of adding a tx id to a future block id. Minimum ticket price is set at 1 unit (and
this can be changed via the @min_amount variable).
Variables
---------
@00 ==> @timestamp
@01 ==> @payout_time
@02 ==> @txid
@03 ==> @tx_time
@04 ==> @tx_info
@05 ==> @best_ticket
@06 ==> @best_account
@07 ==> @balance
@08 ==> @tx_amount
@09 ==> @min_amount
@0a ==> @target_account
Functions
---------
20 (0x14) = get a time stamp value for the last block in the blockchain
21 (0x15) = get txid for the first tx after the provided time stamp
22 (0x16) = get a time stamp value for a given txid
23 (0x17) = get ticket for a given txid
24 (0x18) = get source account/address for a given txid
27 (0x1b) = get funds amount for a given txid
28 (0x1c) = get tx type and subtype for a given txid
31 (0x1f) = pay given funds amount to a given account/address
32 (0x20) = get old balance of own account
33 (0x21) = pay old balance to a given account/address
Sample Function Data
--------------------
balance 1000
function 020 0x0000000000012345 true
function +021 0x0000000000000064,0x0000000000000065,0x0000000000000066,0x0000000000000067,0x0000000000000000 false
function 022 0x00000000000a5da8,0x00000000000a5db8,0x00000000000a5dc4,0x00000000000a5dc8,0x0000000000000000 false
function 023 0x000000000000ff00,0x000000000000ee00,0x000000000000fff0,0x000000000000ffff,0x0000000000000000 false
function 024 0x1111000000000000,0x2222000000000000,0x3333000000000000,0x4444000000000000,0x0000000000000000 false
function 027 0x0000000000000064,0x0000000000000062,0x0000000000000128,0x0000000000000064,0x0000000000000000 false
function 028 0x0000000000000000 true
Sample Run Output
-----------------
func: 20 rc: 0000000000012345
func1: 21 with 74565 rc: 0000000000000064
func1: 22 with 100 rc: 00000000000a5da8
func1: 27 with 100 rc: 0000000000000064
func1: 28 with 100 rc: 0000000000000000
func1: 23 with 100 rc: 000000000000ff00
func1: 24 with 100 rc: 1111000000000000
func1: 21 with 679336 rc: 0000000000000065
func1: 22 with 101 rc: 00000000000a5db8
func1: 27 with 101 rc: 0000000000000062
func1: 24 with 101 rc: 2222000000000000
payout 98 to account: 2222000000000000
func1: 21 with 679352 rc: 0000000000000066
func1: 22 with 102 rc: 00000000000a5dc4
func1: 27 with 102 rc: 0000000000000128
func1: 24 with 102 rc: 3333000000000000
payout 196 to account: 3333000000000000
func1: 28 with 102 rc: 0000000000000000
func1: 23 with 102 rc: 000000000000fff0
func1: 24 with 102 rc: 3333000000000000
func1: 21 with 679364 rc: 0000000000000067
func1: 22 with 103 rc: 00000000000a5dc8
func: 32 rc: 0000000000000285
payout 642 to account: 3689292519746568192
func1: 33 with 3689292519746568192 rc: 0000000000000000
(stopped - zero balance)
Script Assembly
---------------
if @timestamp not zero goto loop 1e0000000039
set @min_amount to 100 (1 unit) 01090000006400000000000000
get last block timestamp and put in @timestamp 35140000000000
:init (0000001a)
set @payout_time to $timestamp 020100000000000000
set @tx_info to (604800 seconds in a week) 0104000000803a090000000000
add @tx_info to @payout_time 060100000004000000
:loop (00000039)
get tx at after @timestamp and store in @txid 3615000200000000000000
if @txid is zero finish 2602000000
get timestamp for @txid and store in @tx_time 3616000300000002000000
if @tx_time > @payout_time goto payout 1f030000000100000072
get amount for @txid and store in @tx_amount 361b000800000002000000
if @tx_amount == @min_amount goto continue 2308000000090000000f
goto refund 1af3000000
:continue (00000078)
get tx type for @txid and store in @tx_info 361c000400000002000000
if @tx_info is non-zero goto skip 1e0400000035
get ticket for @txid and store in @tx_info 3617000400000002000000
if @tx_info zero finish 26040000007f
if @tx_info < @best_ticket goto skip 2004000000050000001e
set @best_ticket to @tx_info 020500000004000000
get account for @txid and put in @best_account 3618000600000002000000
:skip (000000b8)
set @timestamp to @tx_time 020000000003000000
goto loop 1a39000000
:payout (000000c6)
get old balance and store in @balance 35200007000000
if @balance is zero goto empty 1b0700000018
if @best_ticket is zero goto empty 1b0500000012
pay balance to @best_account 33210006000000
goto finish_payout 1a31010000
:empty (000000e5)
set @timestamp to @tx_time 020000000003000000
goto init 1a1a000000
:refund (000000f3)
get account for @tx_id and put in @target_account 3618000a00000002000000
if @tx_amount < @min_amount goto :refund_less 20080000000900000023
subtract @min_amount from @tx_amount 070800000009000000
send @tx_amount to @target_account 341f00080000000a000000
goto continue 1a78000000
:refund less (00000121)
send @tx_amount to @target_account 341f00080000000a000000
goto skip 1ab8000000
:finish_payout (00000131)
set @timestamp to @payout_time 020000000004000000
clear @best_ticket to zero 0305000000
goto init 1a1a000000
Assembly Code
-------------
00000000* BNZ $00000000 :00000039
00000006 SET @00000009 #0000000000000064
00000013 FUN @00000000 20
0000001a SET @00000001 $00000000
00000023 SET @00000004 #0000000000093a80
00000030 ADD @00000001 $00000004
00000039 FUN @00000002 21 $00000000
00000044 FIZ @00000002
00000049 FUN @00000003 22 $00000002
00000054 BGT $00000003 $00000001 :000000c6
0000005e FUN @00000008 27 $00000002
00000069 BEQ $00000008 $00000009 :00000078
00000073 JMP :000000f3
00000078 FUN @00000004 28 $00000002
00000083 BNZ $00000004 :000000b8
00000089 FUN @00000004 23 $00000002
00000094 FIZ @00000004
00000099 NOP
0000009a BLT $00000004 $00000005 :000000b8
000000a4 SET @00000005 $00000004
000000ad FUN @00000006 24 $00000002
000000b8 SET @00000000 $00000003
000000c1 JMP :00000039
000000c6 FUN @00000007 32
000000cd BZR $00000007 :000000e5
000000d3 BZR $00000005 :000000e5
000000d9 FUN 33 $00000006
000000e0 CLR @00000005
000000e5 SET @00000000 $00000003
000000ee JMP :0000001a
000000f3 FUN @0000000a 24 $00000002
000000fe BLT $00000008 $00000009 :0000012c
00000108 SUB @00000008 $00000009
00000111 FUN 31 $0000000a $00000002
0000011c JMP :00000078
00000121 FUN 31 $00000008 $0000000a
0000012c JMP :000000b8
Machine Code
------------
1e000000003901090000006400000000000000351400000000000201000000000000000104000000803a0900000000000601
000000040000003615000200000000000000260200000036160003000000020000001f030000000100000072361b00080000
00020000002308000000090000000f1af3000000361c0004000000020000001e040000003536170004000000020000002604
0000007f2004000000050000001e02050000000400000036180006000000020000000200000000030000001a390000003520
00070000001b07000000181b0500000012332100060000001a310100000200000000030000001a1a0000003618000a000000
0200000020080000000900000023070800000009000000341f00080000000a0000001a78000000341f00080000000a000000
1ab800000002000000000400000003050000001a1a000000
