Hi all,
I've built the following simple blockchain:
[{"id":"458ccfaf.f3e23","type":"inject","z":"553ed51c.af9a8c","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"data:image/png;base64,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","payloadType":"str","x":170,"y":480,"wires":[["1900752e.7aa9bb"]]},{"id":"1900752e.7aa9bb","type":"split","z":"553ed51c.af9a8c","name":"","splt":"1000","spltType":"len","arraySplt":1,"arraySpltType":"len","stream":false,"addname":"","x":290,"y":480,"wires":[["7774c858.794458"]]},{"id":"7774c858.794458","type":"join","z":"553ed51c.af9a8c","name":"blockchain","mode":"reduce","build":"string","property":"payload","propertyType":"msg","key":"topic","joiner":",","joinerType":"str","accumulate":false,"timeout":"","count":"2","reduceRight":false,"reduceExp":"$append($A,[{\t\"index\": $I,\t\"timestamp\": $millis(), \t\t\"data\": payload,\t\t\t\t\t\"hash\" : \t\t\t(\t $binPad:=function($n, $len){$pad($formatBase($n,2),-$len,'0')};\t $bitwise:=function($lb, $rb, $fn){$split($lb,'')~>$map(function($c, $i){$fn($c='1',$substring($rb,$i,1)='1')?$power(2,(7-$i)):0})~>$sum()};\t $and:=function($l,$r){$bitwise($binPad($l,8),$binPad($r,8),function($1,$2){$1 and $2})};\t $or:=function($l,$r){$bitwise($binPad($l,8),$binPad($r,8),function($1,$2){$1 or $2})}; \t [0..15]~>$map(function(){$floor($random()*256)})\t ~>$map(function($v,$i){$i=6?$or($and($v,15),64):$i=8?$or($and($v,63),128):$v})\t ~>$map(function($n,$i){$pad($formatBase($n,16),-2,'0') & ($i in [3,5,7,9]?'':'')})\t ~>$join()\t),\t\t\t\"previousHash\" : \"GenesisNode\"\t\t\t\t\t}])","reduceInit":"[]","reduceInitType":"json","reduceFixup":"","x":430,"y":480,"wires":[["c643af25.326e2","bde6cda7.66a92"]]},{"id":"bde6cda7.66a92","type":"split","z":"553ed51c.af9a8c","name":"","splt":"\\n","spltType":"str","arraySplt":1,"arraySpltType":"len","stream":false,"addname":"","x":410,"y":560,"wires":[["3fd0c7eb.457e28"]]},{"id":"3fd0c7eb.457e28","type":"switch","z":"553ed51c.af9a8c","name":"","property":"payload.index","propertyType":"msg","rules":[{"t":"eq","v":"0","vt":"str"},{"t":"gt","v":"0","vt":"num"}],"checkall":"true","repair":false,"outputs":2,"x":530,"y":560,"wires":[["3d4e257f.b38e1a"],["98681b36.5589a8"]]},{"id":"3d4e257f.b38e1a","type":"change","z":"553ed51c.af9a8c","name":"GenesisBlock","rules":[{"t":"set","p":"payload.previousHash","pt":"msg","to":"GenesisBlock","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":680,"y":540,"wires":[["cc57c6d3.16fc88"]]},{"id":"98681b36.5589a8","type":"change","z":"553ed51c.af9a8c","name":"previousHash","rules":[{"t":"set","p":"payload.previousHash","pt":"msg","to":"payload.hash","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":680,"y":600,"wires":[["cc57c6d3.16fc88"]]},{"id":"cc57c6d3.16fc88","type":"debug","z":"553ed51c.af9a8c","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":875,"y":560,"wires":[],"l":false},{"id":"c643af25.326e2","type":"debug","z":"553ed51c.af9a8c","name":"array","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":630,"y":480,"wires":[]},{"id":"48cd5886.699b38","type":"comment","z":"553ed51c.af9a8c","name":"Current Blockchain ","info":"should be:\n(previousHash[i]=hash[i-1])","x":170,"y":420,"wires":[]}]
however, I'm having difficulties to complete the last part: setting the current block payload.previousHash[i] to the previous block payload.hash[i-1] like that:
I solved it hardcoded, but I know there's a much better and scalable solution.
Any help would be highly appreciated. Thanks!
