Web Omega

Contract Name: Balance Tracker
Contract Description: This is a public library. Any contract may use it track its balance.
Author: omegasuite
Language: asm
Created: 2020-09-07 06:28:53
Version: 1.0
Status: created

Source Code

; this is a lib for public use. it assumes the caller uses following params to store coins (type 0) received:
; utxotid, utxotseq, lastid, lastseq, balance

MALLOC gi0,8,		; alloc mem len for the result (code start)
EVAL32 gi0,4,		; length of result
EVAL32 gi4,BODY,	; result = the first instruction of contract body code.
STOP

; contract body
; input parameters
define INABI i8		; function ABI

define BODY .
ALLOC ii0"8,360,	
EVAL32 ii0"8,INABI,1,!		; if it is a lib init call, return
IF ii0"8,2,
RETURN

EVAL64 BALANCEDATA,0,		; clear memory in case entry does not exist
EVAL32 LASTSEQDATA,0,		; outpoint for last token sent to us
EVAL256 LASTIDDATA,x0,
EVAL32 UTXOTSEQDATA,0,		; outpoint for acculated value we have (not incl. last token)
EVAL256 UTXOTIDDATA,x0,
LOAD BALANCE,abi("balance"),	; load balance & outpoints
LOAD LASTSEQ,abi("lastseq"),
LOAD LASTID,abi("lastid"),
LOAD UTXOTSEQ,abi("utxotseq"),
LOAD UTXOTID,abi("utxotid"),

EVAL32 ii0"8,INABI,abi("disburse(pointer,pointer)"),=	; if it is a disburse (on suicide) call, do disbursement
IF ii0"8,.disburse,					; otherwise, regular balancement mgmt

; refular interface _(*address for result, flag for pay tx fee, extra amount)
define RESULT i12	; address for result
define txflag i20	; flag to pay min tax
define TX i28		; extra amount to pay

define UTXOTID ii0"8
define UTXOTIDDATA ii0"12
define UTXOTSEQ ii0"44
define UTXOTSEQDATA ii0"48

define LASTID ii0"52
define LASTIDDATA ii0"56
define LASTSEQ ii0"88
define LASTSEQDATA ii0"92

define tokentype ii0"108
define tokenval ii0"116
define scriptlen ii0"124
define scriptver ii0"128
define scriptstr ii0"129
define scriptfunc ii0"149

define OUTPOINT ii0'160

define ctr ii0"200
define contract ii0"204

define BALANCE ii0"232
define BALANCEDATA ii0"236

define txfees ii0"244
define outval ii0"252

define tmp ii0"288

GETCOIN tokentype,		; coin sent to this contract
META ctr,7,"address",		; address of this contract

EVAL64 tmp,tokentype,0,!	; if coin type is not 0, return with fail
IF tmp,.fail,

EVAL64 tmp,TX,0,!
IF tmp,.txfeeckd,
IF txflag,.txfeeckd,

EVAL64 tmp,tokenval,0,=		; if coin value is 0 & no fee & nothing to pay, nothing to do.
	IF tmp,.success,		; return with success

; because it is a lib call, we are using the caller's storage

define txfeeckd .
	RECEIVED OUTPOINT,		; outpoint for current script

EVAL256 tmp,UTXOTIDDATA,x0,=			; first time received coin. make utxo the current one
	IF tmp,.first,
	EVAL256 tmp,LASTIDDATA,x0,=			; second time received coin. make last the current one
	IF tmp,2,
	SPEND LASTIDDATA,LASTSEQDATA,
	EVAL64 tmp,tokenval,0,=
	IF tmp,.zero,
		STORE abi("lastid"),HOUTPOINT,
		STORE abi("lastseq"),DOUTPOINT"32,
		IF 1,.txamount,

define zero .
	STORE abi("lastid"),Hx0,
	STORE abi("lastseq"),D0,

define txamount .
	EVAL64 outval,BALANCEDATA,
	EVAL64 BALANCEDATA,BALANCEDATA,tokenval,+
	SPEND UTXOTIDDATA,UTXOTSEQDATA,
	EVAL64 txfees,0,
	IF txflag,2,
	IF 1,2,
	TXFEE txfees,2,				; min tax
	EVAL64 txfees,txfees,TX,+		; plus extra amount

EVAL64 outval,outval,txfees,-
	EVAL64 tmp,outval,0,>
	IF tmp,.normal,

; balance is not enough, use the entire balance as txfee
	STORE abi("balance"),Qtokenval,
	LOAD UTXOTSEQ,abi("lastseq"),		; shift outpoints up
	LOAD UTXOTID,abi("lastid"),		; read it instaed of using OUTPOINT because it could be 0
	STORE abi("lastid"),Hx0,
	STORE abi("lastseq"),D0,
	STORE abi("utxotid"),HUTXOTIDDATA,
	STORE abi("utxotseq"),DUTXOTSEQDATA,
	IF 1,.insufficient,

define normal .
	EVAL64 BALANCEDATA,BALANCEDATA,txfees,-
	STORE abi("balance"),QBALANCEDATA,
	STORE abi("utxotid"),HOUTPOINT,
	EVAL64 tokenval,outval,
	EVAL32 scriptlen,21,
	EVAL8 scriptver,x88,
	COPY scriptstr,contract,20,
	ADDTXOUT i232,tokentype,
	STORE abi("utxotseq"),Di232,		; seq of added txo
	IF 1,.success,

define first .
	EVAL64 tmp,tokenval,0,=
	IF tmp,.success,
	STORE abi("utxotid"),HOUTPOINT,
	STORE abi("utxotseq"),DOUTPOINT"32,
	STORE abi("balance"),Qtokenval,
	IF txflag,.insufficient,
	IF 1,.success,

define second .
	EVAL64 tmp,tokenval,0,=
	IF tmp,.success,
	STORE abi("lastid"),HOUTPOINT,
	STORE abi("lastseq"),DOUTPOINT"32,
	IF txflag,.txamount,
	EVAL64 BALANCEDATA,tokenval,BALANCEDATA,+
	STORE abi("balance"),QBALANCEDATA,
	IF 1,.success,

define fail .
	EVAL64 tmp,RESULT,0,=
	IF tmp,2,
	EVAL8 iRESULT,1,
	RETURN

define success .
	EVAL64 tmp,RESULT,0,=
	IF tmp,2,
	EVAL8 iRESULT,0,
	RETURN

define insufficient .
	EVAL64 tmp,RESULT,0,=
	IF tmp,2,
	EVAL8 iRESULT,2,
	RETURN

define disburse .		; this is called when caller suicides. not when this lib suicides. lib can not suicide.
	GETCOIN tokentype,		; for suicide, must take no value in
	EVAL64 tmp,tokentype,0,!
	IF tmp,.fail,
	EVAL64 tmp,tokenval,0,!
	IF tmp,.fail,

EVAL64 tmp,BALANCEDATA,0,=		; no balance, go die directly
	IF tmp,.kill,

EVAL64 tmp,UTXOTIDDATA,0,=		; spend all
	IF tmp,2,
	SPEND UTXOTIDDATA,UTXOTSEQDATA,
	EVAL64 tmp,LASTIDDATA,0,=
	IF tmp,2,
	SPEND LASTIDDATA,LASTSEQDATA,

TXFEE txfees,2,				; pay fees
	EVAL64 outval,BALANCEDATA,txfees,-
	EVAL64 tmp,outval,0,(
	IF tmp,.kill,

EVAL64 tokenval,outval,
	EVAL32 scriptlen,25,
	COPY scriptver,ii20,21,			; this func takes 1 address param
	EVAL32 scriptfunc,x41,			; pkhpubkey
	ADDTXOUT i232,tokentype,

define kill .				; die. delete storage
	DEL abi("balance"),
	DEL abi("utxotid"),
	DEL abi("utxotseq"),
	DEL abi("lastid"),
	DEL abi("lastseq"),
	DEL abi("sequence"),
	IF 1,.success,			; return, not destruct, destruct is caller's job

Hash:
0443fe33f72979fa275b511411494c7f76cc588e
Hex:

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Debug info: