Blockchain Based Transaction System with Fungible and Non-Fungible Tokens for a Community-Based Energy Infrastructure

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. 2021 May 31;21(11):3822. doi: 10.3390/s21113822

Algorithm 3 Create a NFT

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functionCreateNFT(tokentype string, creatingfortransfer bool, buyer string, availableassets int)
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$i n v o k e r o r g \leftarrow G e t C l i e n t I d e n t i t y () . G e t M S P I D ()$
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$i n v o k e r c l i e n t \leftarrow G e t C l i e n t I d e n t i t y () . G e t I D ()$
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$t e s t \leftarrow t o k e n t y p e + “_” + i n v o k e r o r g$
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switch test
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$“ E U n i t_O r g 1 M S P ” o r “ E V U n i t_O r g 1 M S P ”$
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$e n d o r s e r o r g = “ O r g 3 M S P ”$
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$“ I n U n i t_O r g 2 M S P ” o r “ G a U n i t_O r g 2 M S P ”$
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$e n d o r s e r o r g = “ O r g 1 M S P ”$
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$“ S t U n i t_O r g 3 M S P ” o r “ E S t U n i t_O r g 3 M S P ”$
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$e n d o r s e r o r g = “ O r g 1 M S P ”$
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Default: “Invoker Organization and Token Type combination invalid”
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if creatingfortransfer == true then
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$i d v a l \leftarrow b u y e r + “_” + t o k e n t y p e + “_” + G e t T x I D ()$
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$o w n e r \leftarrow b u y e r$
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else
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$i d v a l \leftarrow i n v o k e r c l i e n t + “_” + t o k e n t y p e + “_” + G e t T x I D ()$
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$o w n e r \leftarrow i n v o k e r c l i e n t$
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end if
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$t o k e n n e w \leftarrow N e w T o k e n (I D \leftarrow i d v a l, T o k e n T y p e \leftarrow t o k e n t y p e,$ AvailableAssets $\leftarrow a v a i l a b l e a s s e t s, O w n e r \leftarrow o w n e r)$
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$t o k e n J S O N \leftarrow j s o n . M a r s h a l (t o k e n n e w)$
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$P u t S t a t e (i d v a l, t o k e n J S O N)$

▹ Saving new token
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$S e t T o k e n S t a t e B a s e d E n d o r s e m e n t (t o k e n n e w . I D, i n v o k e r o r g, e n d o r s e r o r g)$

▹ Calling Algorithm 1
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end function