A Research on Traceability Technology of Agricultural Products Supply Chain Based on Blockchain and IPFS

<table class="algorithm-group"><tr><td><table class="algorithm" id="alg3"><tr><td colspan="2">Input: IDbuyer, IDseller, address_buyer, address_seller, Ppri, Pquan, Pqual, Fine</td></tr><tr><td colspan="2">Output: Transaction result</td></tr><tr><td>(1)</td><td>The seller applies smart contract function: negotiate (IDbuyer, IDseller, Ppri, Pquan, Pqual)//Both parties can negotiate the commodity price, quantity and quality through this function.</td></tr><tr><td>(2)</td><td>if Pay_pri = Ppri × Pquan||Fine = λ·Pay_pri then</td></tr><tr><td>(3)</td><td> Contract status becomes Sell_agree</td></tr><tr><td>(4)</td><td>if Confirm receipt or time stamp &gt; deadline then</td></tr><tr><td>(5)</td><td> Apply smart contract function: Trans_Record (payment, address_buyer, address_seller)</td></tr><tr><td>(6)</td><td> else</td></tr><tr><td>(7)</td><td> Trigger the contract event: Dispute_event (IDbuyer, IDseller, Ppri, Pquan, Pqual, Fine)</td></tr><tr><td>(8)</td><td> end if</td></tr><tr><td>(9)</td><td>else</td></tr><tr><td>(10)</td><td> Contract status becomes Sell_disagree</td></tr><tr><td>(11)</td><td> return (“transaction failed”)</td></tr><tr><td>(12)</td><td>end if</td></tr></table></td></tr></table>

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alg3

Algorithm 3

Algorithm 3: A Research on Traceability Technology of Agricultural Products Supply Chain Based on Blockchain and IPFS 