A script for creating NFTs on the Elrond Network

elrond_nft.sh

#!/bin/bash

# Deriving PEM file
#
erdpy --verbose wallet derive wallet.pem --mnemonic


# Elrond Network Variables

CONTRACT_ADDRESS="erd1qqqqqqqqqqqqqqqpqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqzllls8a5w6u"
PROXY="https://devnet-gateway.elrond.com"
CHAIN="D"


# User Variables

OWNER_ADDRESS="erd1fhwm9gruam74lmaxmuqchrz5kd43qnjznk4z8lzw34f34g6dl99snwxd5u"
PEM="wallet.pem"
NAME="awaitnil"
TICKER="AWT"
ID="AWT-302d62"


# Utility Functions

hex()  { printf "0x%s" $(echo -n $@ | xxd -p -c 10000000000000000); }

egld() { printf "%.0f" $(bc <<< 10^18*$1); }

royalties() { printf "%.0f" $(bc <<< 100*$1); }

decode_bech32() { printf "0x%s" $(erdpy wallet bech32 --decode $1); }

hash_img() { cut -b-64 <<< $(sha256sum $1); }


# Contract Functions

issue_nft() {
    # Arguments:
    # $1 : issueNonFungible
    #    | issueSemiFungible
    # $2 : Token Name
    # $3 : Token Ticker
    erdpy contract call $CONTRACT_ADDRESS   \
          --pem         $PEM                \
          --chain       $CHAIN              \
          --proxy       $PROXY              \
          --function    $1                  \
          --arguments   $(hex $2) $(hex $3) \
          --value       $(egld 0.05)        \
          --gas-limit   60000000            \
          --recall-nonce                    \
          --send
}

set_special_role() {
    # Arguments:
    # $1  : Token Identifier
    # $2  : Owner address
    # $3~ : | ESDTRoleNFTCreate
    #       | ESDTRoleNFTBurn
    #       | ESDTRoleNFTAddQuantity (SFT only)
    for role in ${@:3}; do ROLES="${ROLES} $(hex $role)"; done
    erdpy contract call $CONTRACT_ADDRESS                    \
          --pem         $PEM                                 \
          --chain       $CHAIN                               \
          --proxy       $PROXY                               \
          --function    setSpecialRole                       \
          --arguments   $(hex $1) $(decode_bech32 $2) $ROLES \
          --gas-limit   60000000                             \
          --recall-nonce                                     \
          --send
}

esdtnft_create() {
    # Arguments:
    # $1  : Token Identifier
    # $2  : Quantity
    # $3  : NFT Name
    # $4  : Royalties
    # $5  : Hash
    # $6  : Attributes
    # $7~ : URI
    for uri in ${@:7}; do URIS="${URIS} $(hex $uri)"; done
    erdpy contract call $OWNER_ADDRESS            \
          --pem         $PEM                      \
          --chain       $CHAIN                    \
          --proxy       $PROXY                    \
          --function    ESDTNFTCreate             \
          --arguments   $(hex $1) $2 $(hex $3)    \
                        $(royalties $4) $(hex $5) \
                        $(hex $6) $URIS           \
          --gas-limit   70000000                  \
          --recall-nonce                          \
          --send
}

# Issue a new
#
# https://docs.elrond.com/developers/nft-tokens/#issuance-of-non-fungible-tokens
# https://docs.elrond.com/developers/nft-tokens/#issuance-of-semi-fungible-tokens
issue_nft issueNonFungible $NAME $TICKER


# Set special roles
#
# https://docs.elrond.com/developers/nft-tokens/#assigning-roles
set_special_role $ID $OWNER_ADDRESS ESDTRoleNFTCreate ESDTRoleNFTBurn


# Create an NFT
#
# https://docs.elrond.com/developers/nft-tokens/#creation-of-an-nft
QUANTITY=1
NAME="Awaitnil #1"
ROYALTIES=20
HASH=$(hash_img "nft.png")
ATTRIBUTES="user:awaitnil;eyes:lightning"
URI="https://ipfs.io/ipfs/QmVG5Ah1zCjNtirxC89jQLzTnqHDMrmcVvFNAzKghAnBpq"
esdtnft_create $ID $QUANTITY "${NAME}" $ROYALTIES $HASH "${ATTRIBUTES}" $URI