Create NFTs on CARDANO #CNFT

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Stake your ADA with NOOPS

1 Create a NFT payment addr (air-gapped offline machine)

• Create a new payment key pair

cardano-cli address key-gen \
    --verification-key-file nft-payment.vkey \
    --signing-key-file nft-payment.skey

• Build a payment address for the payment key

cardano-cli address build \
--payment-verification-key-file nft-payment.vkey \
--out-file nft-payment.addr \
--mainnet

2 Fund your NFT payment addr

Yoroi, binance, Daedalus, etc…

3 Create policy

• Generate policy key (air-gapped offline machine)

cardano-cli address key-gen \
--verification-key-file nft-policy.vkey \
--signing-key-file nft-policy.skey

• Hash your policy.vkey

cardano-cli address key-hash --payment-verification-key-file nft-policy.vkey

• Add the policy.vkey hash to the policy.script

{
  “type” : “all”,
  “scripts” : [
    {
      “keyHash”: “<policy.vkey-hash>”,
      “type”: “sig”
    },
    {
      “type” : “before”,
      “slot” : <slotplus1h>
    }
   ]
}

• Retrieve the policyid

cardano-cli transaction policyid --script-file policy.script

4 Add your NFT to IPFS

• Register on blockfrost.io
• Add your nft

curl "https://ipfs.blockfrost.io/api/v0/ipfs/add" \
  -X POST \
  -H "project_id: <PROJECT_ID>" \
  -F "file=@<NFTFILE>"

• Store the ipfs_hash

5 Create Metadata

• metadata.json

{
  "721": {
    "<policy-id>": {
      "Noops1": {
        "id": 0,
        "name": "<NFT_NAME> 0",
        "image": "ipfs://ipfs/<IPFS_HASH>",
        "tags": [
          "<TAG1>"
        ]
      },
      "Noops2": {
        "id": 1,
        "name": "<NFT_NAME> 1",
        "image": "ipfs://ipfs/<IPFS_HASH>",
        "tags": [
          "<TAG1>"
        ]
      }
    },
    "description": "<DESCRIPTION>",
    "creator": "<CREATOR>",
    "publisher": [
       "<PUBLISHER>"
    ],
    "version": 1
  }
}

4 Create the transaction

• Check the utxo

cardano-cli query utxo --address $(cat nft-payment.addr) \
--mainnet

• Build the transaction

tx_in="${tx_in} --tx-in ${in_addr}#${idx}"
cardano-cli transaction build-raw \
  $tx_in  \
  --tx-out $ADDR+0+"1 $POLICYID.Noops1 + 1 $POLICYID.Noops2" \
  --mint="1 $POLICYID.Noops1 + 1 $POLICYID.Noops2" \
  --metadata-json-file metadata.json \
  --fee 0 \
  --invalid-hereafter $slot1000 \
  --out-file tx.raw
fee=$(cardano-cli transaction calculate-min-fee \
  --tx-body-file tx.raw \
  --tx-in-count 1 \
  --tx-out-count 1 \
  --witness-count 2 \
  --mainnet \
  --protocol-params-file protocol.json | awk '{ print $1 }')

afterfee=$(($total_balance-$fee))
cardano-cli transaction build-raw \
  --fee $fee \
  $tx_in \
  --tx-out $ADDR+$afterfee+"1 $POLICYID.Noops1 + 1 $POLICYID.Noops2" \
  --mint="1 $POLICYID.Noops1 + 1 $POLICYID.Noops2" \
  --invalid-hereafter $slot1000 \
  --metadata-json-file metadata.json \
  --out-file tx.raw

5 Sign the transaction (air-gapped offline machine)

• Retrieve the tx.raw from your node

cardano-cli transaction sign \
--signing-key-file nft-payment.skey \
--signing-key-file nft-policy.skey \
--script-file policy.script \
--mainnet \
--tx-body-file tx.raw \
--out-file tx.signed

6 Submit the transaction

• Retrieve the tx.signed from your offline machine

cardano-cli transaction submit --tx-file tx.signed --mainnet

Stake your ADA and earn passive income ~5%