Burning the NFTs
Now that we’re no longer in the committee, there’s just one piece of cleanup left to do: burning the NFTs.
Step 1: Burning the Hot NFT
Warning
You must burn the hot NFT before you burn the cold NFT. If you burn the cold NFT first, you won’t be able to burn the hot NFT because the delegation group needs to authorize the burn.
Once more, we will use orchestrator-cli to prepare the transaction assets:
$ fetch-hot-nft-utxo
$ orchestrator-cli burn-hot \
--utxo-file hot-nft.utxo \
--out-dir burn-hot
As before, let’s see what assets were prepared:
$ ls burn-hot -1
mint.redeemer.json
nft.redeemer.json
This time we just get a minting redeemer and an NFT lock script redeemer. There is no NFT output so no datum or value file is written.
$ cat burn-hot/mint.redeemer.json
{
"constructor": 1,
"fields": [
{
"constructor": 0,
"fields": [
{
"constructor": 0,
"fields": [
{
"bytes": "42e381fc2d8e4cf65d4564be1545ce891cb80c952c2f51c60fa0460d66ff11ce"
}
]
},
{
"int": 0
}
]
}
]
}
$ cat burn-hot/nft.redeemer.json
{
"constructor": 10,
"fields": []
}
The minting redeemer instructs the minting script to burn ("constructor": 1) all tokens in input 42e381fc2d8e4cf65d4564be1545ce891cb80c952c2f51c60fa0460d66ff11ce#0.
The NFT redeemer contains no interesting information.
Step 2: Create the Hot Burn Transaction
Initially, it seems that we should be able to burn both NFTs in a single transaction.
However, if we try do submit a transaction that does so, we get the following error code: BabbageNonDisjointRefInputs.
This is because the cold NFT input must be spent to burn the cold NFT, but it also must be included as a reference input to burn the hot NFT (as with rotate, the burn action requires signatures from the delegation group for the hot NFT).
There is a ledger rule that requires the set of reference inputs to be disjoint from the set of inputs in a transaction.
So, we have to do it in two transactions.
$ tx-bundle build \
--tx-in "$(get-orchestrator-ada-only | jq -r '.key')" \
--tx-in-collateral "$(get-orchestrator-ada-only | jq -r '.key')" \
--read-only-tx-in-reference $(cardano-cli query utxo --address $(cat init-cold/nft.addr) --output-json | jq -r 'keys[0]') \
--tx-in $(cardano-cli query utxo --address $(cat init-hot/nft.addr) --output-json | jq -r 'keys[0]') \
--tx-in-script-file init-hot/nft.plutus \
--tx-in-inline-datum-present \
--tx-in-redeemer-file burn-hot/nft.redeemer.json \
--mint "-1 $(cat init-hot/minting.plutus.hash).$(cat init-hot/nft-token-name)" \
--mint-script-file init-hot/minting.plutus \
--mint-redeemer-file burn-hot/mint.redeemer.json \
--required-signer-group-name delegation \
--required-signer-group-threshold 2 \
--required-signer-hash $(orchestrator-cli extract-pub-key-hash example-certificates/child-1.cert) \
--required-signer-hash $(orchestrator-cli extract-pub-key-hash example-certificates/child-2.cert) \
--required-signer-hash $(orchestrator-cli extract-pub-key-hash example-certificates/child-3.cert) \
--change-address $(cat orchestrator.addr) \
--out-file burn-hot/body.txbundle
Estimated transaction fee: Coin 667729
$ cc-sign -q \
--tx-bundle-file burn-hot/body.txbundle \
--private-key-file example-certificates/children/child-1/child-1.private \
--out-file burn-hot/child-1.witbundle
$ cc-sign -q \
--tx-bundle-file burn-hot/body.txbundle \
--private-key-file example-certificates/children/child-2/child-2.private \
--out-file burn-hot/child-2.witbundle
$ tx-bundle witness \
--all \
--tx-bundle-file burn-hot/body.txbundle \
--signing-key-file orchestrator.skey \
--out-file burn-hot/orchestrator.witbundle
$ tx-bundle assemble \
--tx-bundle-file burn-hot/body.txbundle \
--witness-bundle-file burn-hot/child-1.witbundle \
--witness-bundle-file burn-hot/child-2.witbundle \
--witness-bundle-file burn-hot/orchestrator.witbundle \
--out-file burn-hot/tx.json
$ cardano-cli conway transaction submit --tx-file burn-hot/tx.json
Transaction successfully submitted.
Step 3. Verify the change on chain
$ cardano-cli conway query utxo --address $(cat init-hot/nft.addr)
TxHash TxIx Amount
--------------------------------------------------------------------------------------
Step 4: Burning the Cold NFT
Once more, we will use orchestrator-cli to prepare the transaction assets:
$ fetch-cold-nft-utxo
$ orchestrator-cli burn-cold \
--utxo-file cold-nft.utxo \
--out-dir burn-cold
As before, let’s see what assets were prepared:
$ ls burn-cold -1
mint.redeemer.json
nft.redeemer.json
The outputs are similar to the ones for burn-hot.
Step 5: Create the Cold Burn Transaction
This will proceed similar to burn-hot, except the membership group needs to sign.
# If using the real minting script (i.e. you are not following the guide in a local testnet)
$ tx-bundle build \
--tx-in "$(get-orchestrator-ada-only | jq -r '.key')" \
--tx-in-collateral "$(get-orchestrator-ada-only | jq -r '.key')" \
--tx-in $(cardano-cli query utxo --address $(cat init-cold/nft.addr) --output-json | jq -r 'keys[0]') \
--tx-in-script-file init-cold/nft.plutus \
--tx-in-inline-datum-present \
--tx-in-redeemer-file burn-cold/nft.redeemer.json \
--mint "-1 $(cat init-cold/minting.plutus.hash).$(cat init-cold/nft-token-name)" \
--mint-script-file init-cold/minting.plutus \
--mint-redeemer-file burn-cold/mint.redeemer.json \
--required-signer-hash $(orchestrator-cli extract-pub-key-hash example-certificates/child-4.cert) \
--required-signer-hash $(orchestrator-cli extract-pub-key-hash example-certificates/child-5.cert) \
--change-address $(cat orchestrator.addr) \
--out-file burn-cold/body.txbundle
Estimated transaction fee: Coin 667729
# If using the custom minting script provided in this guide for the local testnet setup.
$ tx-bundle build \
--tx-in "$(get-orchestrator-ada-only | jq -r '.key')" \
--tx-in-collateral "$(get-orchestrator-ada-only | jq -r '.key')" \
--tx-in $(cardano-cli query utxo --address $(cat init-cold/nft.addr) --output-json | jq -r 'keys[0]') \
--tx-in-script-file init-cold/nft.plutus \
--tx-in-inline-datum-present \
--tx-in-redeemer-file burn-cold/nft.redeemer.json \
--mint "-1 $COLD_POLICY_ID" \
--mint-script-file coldMint.native \
--required-signer-group-name membership \
--required-signer-group-threshold 1 \
--required-signer-hash $(orchestrator-cli extract-pub-key-hash example-certificates/child-4.cert) \
--required-signer-hash $(orchestrator-cli extract-pub-key-hash example-certificates/child-5.cert) \
--change-address $(cat orchestrator.addr) \
--out-file burn-cold/body.txbundle
Estimated transaction fee: Coin 529119
$ cc-sign -q \
--tx-bundle-file burn-cold/body.txbundle \
--private-key-file example-certificates/children/child-5/child-5.private \
--out-file burn-cold/child-5.witbundle
$ tx-bundle witness \
--all \
--tx-bundle-file burn-cold/body.txbundle \
--signing-key-file orchestrator.skey \
--out-file burn-cold/orchestrator.witbundle
# If using the custom minting script provided in this guide for the local testnet setup.
$ tx-bundle witness \
--all \
--tx-bundle-file burn-cold/body.txbundle \
--signing-key-file coldMint.skey \
--out-file burn-cold/coldMint.witbundle
# If using the real minting script (i.e. you are not following the guide in a local testnet)
$ tx-bundle assemble \
--tx-bundle-file burn-cold/body.txbundle \
--witness-bundle-file burn-cold/child-5.witbundle \
--witness-bundle-file burn-cold/orchestrator.witbundle \
--out-file burn-cold/tx.json
# If using the custom minting script provided in this guide for the local testnet setup.
$ tx-bundle assemble \
--tx-bundle-file burn-cold/body.txbundle \
--witness-bundle-file burn-cold/child-5.witbundle \
--witness-bundle-file burn-cold/orchestrator.witbundle \
--witness-bundle-file burn-cold/coldMint.witbundle \
--out-file burn-cold/tx.json
$ cardano-cli conway transaction submit --tx-file burn-cold/tx.json
Transaction successfully submitted.
Step 6. Verify the change on chain
$ cardano-cli conway query utxo --address $(cat init-cold/nft.addr)
TxHash TxIx Amount
--------------------------------------------------------------------------------------
This concludes the guide to using orchestrator-cli.