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main.rs
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#![no_std]
#![no_main]
#[cfg(not(target_arch = "wasm32"))]
compile_error!("target arch should be wasm32: compile with '--target wasm32-unknown-unknown'");
mod constants;
mod error;
mod events;
mod metadata;
mod modalities;
mod utils;
extern crate alloc;
use alloc::{
boxed::Box,
collections::BTreeMap,
format,
string::{String, ToString},
vec,
vec::Vec,
};
use casper_contract::{
contract_api::{
runtime::{self, call_contract, revert},
storage::{self},
},
unwrap_or_revert::UnwrapOrRevert,
};
use casper_types::{
contracts::NamedKeys, runtime_args, CLType, CLValue, ContractHash, ContractPackageHash,
EntryPoint, EntryPointAccess, EntryPointType, EntryPoints, Key, KeyTag, Parameter, RuntimeArgs,
Tagged,
};
use constants::{
ACCESS_KEY_NAME_1_0_0, ACL_PACKAGE_MODE, ACL_WHITELIST, ALLOW_MINTING, APPROVED,
ARG_ACCESS_KEY_NAME_1_0_0, ARG_ACL_PACKAGE_MODE, ARG_ACL_WHITELIST,
ARG_ADDITIONAL_REQUIRED_METADATA, ARG_ALLOW_MINTING, ARG_APPROVE_ALL, ARG_BURN_MODE,
ARG_COLLECTION_NAME, ARG_COLLECTION_SYMBOL, ARG_CONTRACT_WHITELIST, ARG_EVENTS_MODE,
ARG_HASH_KEY_NAME_1_0_0, ARG_HOLDER_MODE, ARG_IDENTIFIER_MODE, ARG_JSON_SCHEMA,
ARG_METADATA_MUTABILITY, ARG_MINTING_MODE, ARG_NAMED_KEY_CONVENTION, ARG_NFT_KIND,
ARG_NFT_METADATA_KIND, ARG_NFT_PACKAGE_KEY, ARG_OPERATOR, ARG_OPERATOR_BURN_MODE,
ARG_OPTIONAL_METADATA, ARG_OWNERSHIP_MODE, ARG_OWNER_LOOKUP_MODE, ARG_PACKAGE_OPERATOR_MODE,
ARG_RECEIPT_NAME, ARG_SOURCE_KEY, ARG_SPENDER, ARG_TARGET_KEY, ARG_TOKEN_HASH, ARG_TOKEN_ID,
ARG_TOKEN_META_DATA, ARG_TOKEN_OWNER, ARG_TOTAL_TOKEN_SUPPLY, ARG_TRANSFER_FILTER_CONTRACT,
ARG_WHITELIST_MODE, BURNT_TOKENS, BURN_MODE, COLLECTION_NAME, COLLECTION_SYMBOL,
ENTRY_POINT_APPROVE, ENTRY_POINT_BALANCE_OF, ENTRY_POINT_BURN, ENTRY_POINT_GET_APPROVED,
ENTRY_POINT_INIT, ENTRY_POINT_IS_APPROVED_FOR_ALL, ENTRY_POINT_METADATA, ENTRY_POINT_MIGRATE,
ENTRY_POINT_MINT, ENTRY_POINT_OWNER_OF, ENTRY_POINT_REGISTER_OWNER, ENTRY_POINT_REVOKE,
ENTRY_POINT_SET_APPROVALL_FOR_ALL, ENTRY_POINT_SET_TOKEN_METADATA, ENTRY_POINT_SET_VARIABLES,
ENTRY_POINT_TRANSFER, ENTRY_POINT_UPDATED_RECEIPTS, EVENTS_MODE, HASH_BY_INDEX,
HASH_KEY_NAME_1_0_0, HOLDER_MODE, IDENTIFIER_MODE, INDEX_BY_HASH, INSTALLER, JSON_SCHEMA,
MAX_TOTAL_TOKEN_SUPPLY, METADATA_CEP78, METADATA_CUSTOM_VALIDATED, METADATA_MUTABILITY,
METADATA_NFT721, METADATA_RAW, MINTING_MODE, NFT_KIND, NFT_METADATA_KIND, NFT_METADATA_KINDS,
NUMBER_OF_MINTED_TOKENS, OPERATOR, OPERATORS, OPERATOR_BURN_MODE, OWNED_TOKENS, OWNERSHIP_MODE,
PACKAGE_OPERATOR_MODE, PAGE_LIMIT, PAGE_TABLE, PREFIX_ACCESS_KEY_NAME, PREFIX_CEP78,
PREFIX_CONTRACT_NAME, PREFIX_CONTRACT_VERSION, PREFIX_HASH_KEY_NAME, PREFIX_PAGE_DICTIONARY,
RECEIPT_NAME, REPORTING_MODE, RLO_MFLAG, TOKEN_COUNT, TOKEN_ISSUERS, TOKEN_OWNERS,
TOTAL_TOKEN_SUPPLY, TRANSFER_FILTER_CONTRACT, TRANSFER_FILTER_CONTRACT_METHOD,
UNMATCHED_HASH_COUNT, WHITELIST_MODE,
};
use core::convert::{TryFrom, TryInto};
use error::NFTCoreError;
use events::{
events_cep47::{record_cep47_event_dictionary, CEP47Event},
events_ces::{
Approval, ApprovalForAll, ApprovalRevoked, Burn, MetadataUpdated, Migration, Mint,
RevokedForAll, Transfer, VariablesSet,
},
};
use metadata::CustomMetadataSchema;
use modalities::{
BurnMode, EventsMode, MetadataMutability, MintingMode, NFTHolderMode, NFTIdentifierMode,
NFTKind, NFTMetadataKind, NamedKeyConventionMode, OwnerReverseLookupMode, OwnershipMode,
Requirement, TokenIdentifier, TransferFilterContractResult, WhitelistMode,
};
use utils::Caller;
#[no_mangle]
pub extern "C" fn init() {
// We only allow the init() entrypoint to be called once.
// If COLLECTION_NAME uref already exists we revert since this implies that
// the init() entrypoint has already been called.
if utils::named_uref_exists(COLLECTION_NAME) {
runtime::revert(NFTCoreError::ContractAlreadyInitialized);
}
// Only the installing account may call this method. All other callers are erroneous.
let installing_account = utils::get_account_hash(
INSTALLER,
NFTCoreError::MissingInstaller,
NFTCoreError::InvalidInstaller,
);
// We revert if caller is not the managing installing account
if installing_account != runtime::get_caller() {
runtime::revert(NFTCoreError::InvalidAccount)
}
// Start collecting the runtime arguments.
let collection_name: String = utils::get_named_arg_with_user_errors(
ARG_COLLECTION_NAME,
NFTCoreError::MissingCollectionName,
NFTCoreError::InvalidCollectionName,
)
.unwrap_or_revert();
let collection_symbol: String = utils::get_named_arg_with_user_errors(
ARG_COLLECTION_SYMBOL,
NFTCoreError::MissingCollectionSymbol,
NFTCoreError::InvalidCollectionSymbol,
)
.unwrap_or_revert();
let total_token_supply: u64 = utils::get_named_arg_with_user_errors(
ARG_TOTAL_TOKEN_SUPPLY,
NFTCoreError::MissingTotalTokenSupply,
NFTCoreError::InvalidTotalTokenSupply,
)
.unwrap_or_revert();
if total_token_supply > MAX_TOTAL_TOKEN_SUPPLY {
runtime::revert(NFTCoreError::ExceededMaxTotalSupply)
}
let allow_minting: bool = utils::get_named_arg_with_user_errors(
ARG_ALLOW_MINTING,
NFTCoreError::MissingMintingStatus,
NFTCoreError::InvalidMintingStatus,
)
.unwrap_or_revert();
let minting_mode: MintingMode = utils::get_named_arg_with_user_errors::<u8>(
ARG_MINTING_MODE,
NFTCoreError::MissingMintingMode,
NFTCoreError::InvalidMintingMode,
)
.unwrap_or_revert()
.try_into()
.unwrap_or_revert();
let ownership_mode: OwnershipMode = utils::get_named_arg_with_user_errors::<u8>(
ARG_OWNERSHIP_MODE,
NFTCoreError::MissingOwnershipMode,
NFTCoreError::InvalidOwnershipMode,
)
.unwrap_or_revert()
.try_into()
.unwrap_or_revert();
let nft_kind: NFTKind = utils::get_named_arg_with_user_errors::<u8>(
ARG_NFT_KIND,
NFTCoreError::MissingNftKind,
NFTCoreError::InvalidNftKind,
)
.unwrap_or_revert()
.try_into()
.unwrap_or_revert();
let holder_mode: NFTHolderMode = utils::get_named_arg_with_user_errors::<u8>(
ARG_HOLDER_MODE,
NFTCoreError::MissingHolderMode,
NFTCoreError::InvalidHolderMode,
)
.unwrap_or_revert()
.try_into()
.unwrap_or_revert();
let whitelist_mode: WhitelistMode = utils::get_named_arg_with_user_errors::<u8>(
ARG_WHITELIST_MODE,
NFTCoreError::MissingWhitelistMode,
NFTCoreError::InvalidWhitelistMode,
)
.unwrap_or_revert()
.try_into()
.unwrap_or_revert();
let acl_whitelist = utils::get_named_arg_with_user_errors::<Vec<Key>>(
ARG_ACL_WHITELIST,
NFTCoreError::MissingACLWhiteList,
NFTCoreError::InvalidACLWhitelist,
)
.unwrap_or_revert();
// Revert if minting mode is not ACL and acl list is not empty
if MintingMode::Acl != minting_mode && !acl_whitelist.is_empty() {
runtime::revert(NFTCoreError::InvalidMintingMode)
}
// Revert if minting mode is ACL or holder_mode is contracts and acl list is locked and empty
if MintingMode::Acl == minting_mode
&& acl_whitelist.is_empty()
&& WhitelistMode::Locked == whitelist_mode
{
runtime::revert(NFTCoreError::EmptyACLWhitelist)
}
let acl_package_mode: bool = utils::get_named_arg_with_user_errors(
ARG_ACL_PACKAGE_MODE,
NFTCoreError::MissingACLPackageMode,
NFTCoreError::InvalidACLPackageMode,
)
.unwrap_or_revert();
let package_operator_mode: bool = utils::get_optional_named_arg_with_user_errors::<bool>(
ARG_PACKAGE_OPERATOR_MODE,
NFTCoreError::InvalidPackageOperatorMode,
)
.unwrap_or_default();
let receipt_name: String = utils::get_named_arg_with_user_errors(
ARG_RECEIPT_NAME,
NFTCoreError::MissingReceiptName,
NFTCoreError::InvalidReceiptName,
)
.unwrap_or_revert();
let package_hash = utils::get_named_arg_with_user_errors::<String>(
ARG_NFT_PACKAGE_KEY,
NFTCoreError::MissingCep78PackageHash,
NFTCoreError::InvalidCep78InvalidHash,
)
.unwrap_or_revert();
let base_metadata_kind: NFTMetadataKind = utils::get_named_arg_with_user_errors::<u8>(
ARG_NFT_METADATA_KIND,
NFTCoreError::MissingNFTMetadataKind,
NFTCoreError::InvalidNFTMetadataKind,
)
.unwrap_or_revert()
.try_into()
.unwrap_or_revert();
let optional_metadata = utils::get_named_arg_with_user_errors::<Vec<u8>>(
ARG_OPTIONAL_METADATA,
NFTCoreError::MissingOptionalNFTMetadataKind,
NFTCoreError::InvalidOptionalNFTMetadataKind,
)
.unwrap_or_revert();
let additional_required_metadata = utils::get_named_arg_with_user_errors::<Vec<u8>>(
ARG_ADDITIONAL_REQUIRED_METADATA,
NFTCoreError::MissingAdditionalNFTMetadataKind,
NFTCoreError::InvalidAdditionalNFTMetadataKind,
)
.unwrap_or_revert();
let nft_metadata_kinds = utils::create_metadata_requirements(
base_metadata_kind,
additional_required_metadata,
optional_metadata,
);
let json_schema: String = utils::get_named_arg_with_user_errors(
ARG_JSON_SCHEMA,
NFTCoreError::MissingJsonSchema,
NFTCoreError::InvalidJsonSchema,
)
.unwrap_or_revert();
// Check if schema is missing before checking its validity
if base_metadata_kind == NFTMetadataKind::CustomValidated && json_schema.is_empty() {
runtime::revert(NFTCoreError::MissingJsonSchema)
}
// Attempt to parse the provided schema if the CustomValidated metadata kind is required or
// optional and fail installation if the schema cannot be parsed.
if let Some(required_or_optional) = nft_metadata_kinds.get(&NFTMetadataKind::CustomValidated) {
if required_or_optional == &Requirement::Required
|| required_or_optional == &Requirement::Optional
{
serde_json_wasm::from_str::<CustomMetadataSchema>(&json_schema)
.map_err(|_| NFTCoreError::InvalidJsonSchema)
.unwrap_or_revert();
}
}
let identifier_mode: NFTIdentifierMode = utils::get_named_arg_with_user_errors::<u8>(
ARG_IDENTIFIER_MODE,
NFTCoreError::MissingIdentifierMode,
NFTCoreError::InvalidIdentifierMode,
)
.unwrap_or_revert()
.try_into()
.unwrap_or_revert();
let metadata_mutability: MetadataMutability = utils::get_named_arg_with_user_errors::<u8>(
ARG_METADATA_MUTABILITY,
NFTCoreError::MissingMetadataMutability,
NFTCoreError::InvalidMetadataMutability,
)
.unwrap_or_revert()
.try_into()
.unwrap_or_revert();
let burn_mode: BurnMode = utils::get_named_arg_with_user_errors::<u8>(
ARG_BURN_MODE,
NFTCoreError::MissingBurnMode,
NFTCoreError::InvalidBurnMode,
)
.unwrap_or_revert()
.try_into()
.unwrap_or_revert();
let operator_burn_mode: bool = utils::get_optional_named_arg_with_user_errors::<bool>(
ARG_OPERATOR_BURN_MODE,
NFTCoreError::InvalidOperatorBurnMode,
)
.unwrap_or_default();
let reporting_mode: OwnerReverseLookupMode = utils::get_named_arg_with_user_errors::<u8>(
ARG_OWNER_LOOKUP_MODE,
NFTCoreError::MissingReportingMode,
NFTCoreError::InvalidReportingMode,
)
.unwrap_or_revert()
.try_into()
.unwrap_or_revert();
// OwnerReverseLookup TransfersOnly mode should be Transferable
if OwnerReverseLookupMode::TransfersOnly == reporting_mode
&& OwnershipMode::Transferable != ownership_mode
{
runtime::revert(NFTCoreError::OwnerReverseLookupModeNotTransferable)
}
let transfer_filter_contract_contract_key =
utils::get_optional_named_arg_with_user_errors::<Option<Key>>(
ARG_TRANSFER_FILTER_CONTRACT,
NFTCoreError::InvalidTransferFilterContract,
)
.unwrap_or_default();
let transfer_filter_contract_contract_hash: Option<ContractHash> =
transfer_filter_contract_contract_key.map(|transfer_filter_contract_contract_key| {
ContractHash::from(
transfer_filter_contract_contract_key
.into_hash()
.unwrap_or_revert(),
)
});
if ownership_mode != OwnershipMode::Transferable
&& transfer_filter_contract_contract_hash.is_some()
{
runtime::revert(NFTCoreError::TransferFilterContractNeedsTransferableMode)
}
// Put all created URefs into the contract's context (necessary to retain access rights,
// for future use).
//
// Initialize contract with URefs for all invariant values, which can never be changed.
runtime::put_key(
COLLECTION_NAME,
storage::new_uref(collection_name.clone()).into(),
);
runtime::put_key(
COLLECTION_SYMBOL,
storage::new_uref(collection_symbol).into(),
);
runtime::put_key(
TOTAL_TOKEN_SUPPLY,
storage::new_uref(total_token_supply).into(),
);
runtime::put_key(
OWNERSHIP_MODE,
storage::new_uref(ownership_mode as u8).into(),
);
runtime::put_key(NFT_KIND, storage::new_uref(nft_kind as u8).into());
runtime::put_key(JSON_SCHEMA, storage::new_uref(json_schema).into());
runtime::put_key(MINTING_MODE, storage::new_uref(minting_mode as u8).into());
runtime::put_key(HOLDER_MODE, storage::new_uref(holder_mode as u8).into());
runtime::put_key(
WHITELIST_MODE,
storage::new_uref(whitelist_mode as u8).into(),
);
runtime::put_key(RECEIPT_NAME, storage::new_uref(receipt_name).into());
runtime::put_key(
&format!("{PREFIX_CEP78}_{collection_name}"),
storage::new_uref(package_hash).into(),
);
runtime::put_key(
NFT_METADATA_KIND,
storage::new_uref(base_metadata_kind).into(),
);
runtime::put_key(
NFT_METADATA_KINDS,
storage::new_uref(nft_metadata_kinds).into(),
);
runtime::put_key(
IDENTIFIER_MODE,
storage::new_uref(identifier_mode as u8).into(),
);
runtime::put_key(
METADATA_MUTABILITY,
storage::new_uref(metadata_mutability as u8).into(),
);
runtime::put_key(BURN_MODE, storage::new_uref(burn_mode as u8).into());
runtime::put_key(
OPERATOR_BURN_MODE,
storage::new_uref(operator_burn_mode).into(),
);
let events_mode: EventsMode = utils::get_named_arg_with_user_errors::<u8>(
ARG_EVENTS_MODE,
NFTCoreError::MissingEventsMode,
NFTCoreError::InvalidEventsMode,
)
.unwrap_or_revert()
.try_into()
.unwrap_or_revert();
// Initialize events structures for CES.
if let EventsMode::CES = events_mode {
utils::init_events();
}
runtime::put_key(EVENTS_MODE, storage::new_uref(events_mode as u8).into());
// Initialize contract with variables which must be present but maybe set to
// different values after initialization.
runtime::put_key(ALLOW_MINTING, storage::new_uref(allow_minting).into());
// This is an internal variable that the installing account cannot change
// but is incremented by the contract itself.
runtime::put_key(NUMBER_OF_MINTED_TOKENS, storage::new_uref(0u64).into());
// Create the data dictionaries to store essential values, topically.
storage::new_dictionary(TOKEN_OWNERS)
.unwrap_or_revert_with(NFTCoreError::FailedToCreateDictionary);
storage::new_dictionary(TOKEN_ISSUERS)
.unwrap_or_revert_with(NFTCoreError::FailedToCreateDictionary);
storage::new_dictionary(APPROVED).unwrap_or_revert_with(NFTCoreError::FailedToCreateDictionary);
storage::new_dictionary(OPERATORS)
.unwrap_or_revert_with(NFTCoreError::FailedToCreateDictionary);
storage::new_dictionary(BURNT_TOKENS)
.unwrap_or_revert_with(NFTCoreError::FailedToCreateDictionary);
storage::new_dictionary(TOKEN_COUNT)
.unwrap_or_revert_with(NFTCoreError::FailedToCreateDictionary);
storage::new_dictionary(METADATA_CUSTOM_VALIDATED)
.unwrap_or_revert_with(NFTCoreError::FailedToCreateDictionary);
storage::new_dictionary(METADATA_CEP78)
.unwrap_or_revert_with(NFTCoreError::FailedToCreateDictionary);
storage::new_dictionary(METADATA_NFT721)
.unwrap_or_revert_with(NFTCoreError::FailedToCreateDictionary);
storage::new_dictionary(METADATA_RAW)
.unwrap_or_revert_with(NFTCoreError::FailedToCreateDictionary);
storage::new_dictionary(HASH_BY_INDEX)
.unwrap_or_revert_with(NFTCoreError::FailedToCreateDictionary);
storage::new_dictionary(INDEX_BY_HASH)
.unwrap_or_revert_with(NFTCoreError::FailedToCreateDictionary);
storage::new_dictionary(PAGE_TABLE)
.unwrap_or_revert_with(NFTCoreError::FailedToCreateDictionary);
storage::new_dictionary(ACL_WHITELIST)
.unwrap_or_revert_with(NFTCoreError::FailedToCreateDictionary);
for key in acl_whitelist.iter() {
utils::upsert_dictionary_value_from_key(
ACL_WHITELIST,
&utils::encode_dictionary_item_key(*key),
true,
);
}
runtime::put_key(ACL_PACKAGE_MODE, storage::new_uref(acl_package_mode).into());
runtime::put_key(
PACKAGE_OPERATOR_MODE,
storage::new_uref(package_operator_mode).into(),
);
if [
OwnerReverseLookupMode::Complete,
OwnerReverseLookupMode::TransfersOnly,
]
.contains(&reporting_mode)
{
let page_table_width = utils::max_number_of_pages(total_token_supply);
runtime::put_key(PAGE_LIMIT, storage::new_uref(page_table_width).into());
}
runtime::put_key(
REPORTING_MODE,
storage::new_uref(reporting_mode as u8).into(),
);
runtime::put_key(RLO_MFLAG, storage::new_uref(false).into());
if let Some(transfer_filter_contract) = transfer_filter_contract_contract_hash {
runtime::put_key(
TRANSFER_FILTER_CONTRACT,
storage::new_uref(transfer_filter_contract).into(),
);
}
}
// set_variables allows the user to set any variable or any combination of variables simultaneously.
// set variables defines what variables are mutable and immutable.
#[no_mangle]
pub extern "C" fn set_variables() {
let installer = utils::get_account_hash(
INSTALLER,
NFTCoreError::MissingInstaller,
NFTCoreError::InvalidInstaller,
);
// Only the installing account can change the mutable variables.
if installer != runtime::get_caller() {
runtime::revert(NFTCoreError::InvalidAccount);
}
if let Some(allow_minting) = utils::get_optional_named_arg_with_user_errors::<bool>(
ARG_ALLOW_MINTING,
NFTCoreError::InvalidAllowMinting,
) {
let allow_minting_uref = utils::get_uref(
ALLOW_MINTING,
NFTCoreError::MissingAllowMinting,
NFTCoreError::InvalidAllowMinting,
);
storage::write(allow_minting_uref, allow_minting);
}
if let Some(acl_package_mode) = utils::get_optional_named_arg_with_user_errors::<bool>(
ARG_ACL_PACKAGE_MODE,
NFTCoreError::MissingACLPackageMode,
) {
let acl_package_mode_uref = utils::get_uref(
ACL_PACKAGE_MODE,
NFTCoreError::MissingACLPackageMode,
NFTCoreError::InvalidACLPackageMode,
);
storage::write(acl_package_mode_uref, acl_package_mode);
}
if let Some(package_operator_mode) = utils::get_optional_named_arg_with_user_errors::<bool>(
ARG_PACKAGE_OPERATOR_MODE,
NFTCoreError::MissingACLPackageMode,
) {
let package_operator_mode_uref = utils::get_uref(
PACKAGE_OPERATOR_MODE,
NFTCoreError::MissingPackageOperatorMode,
NFTCoreError::InvalidPackageOperatorMode,
);
storage::write(package_operator_mode_uref, package_operator_mode);
}
if let Some(operator_burn_mode) = utils::get_optional_named_arg_with_user_errors::<bool>(
ARG_OPERATOR_BURN_MODE,
NFTCoreError::MissingOperatorBurnMode,
) {
let operator_burn_mode_uref = utils::get_uref(
OPERATOR_BURN_MODE,
NFTCoreError::MissingOperatorBurnMode,
NFTCoreError::InvalidOperatorBurnMode,
);
storage::write(operator_burn_mode_uref, operator_burn_mode);
}
let mut new_acl_whitelist = utils::get_optional_named_arg_with_user_errors::<Vec<Key>>(
ARG_ACL_WHITELIST,
NFTCoreError::InvalidACLWhitelist,
)
.unwrap_or_default();
// Deprecated in 1.4 in favor of above ARG_ACL_WHITELIST
let new_contract_whitelist =
utils::get_optional_named_arg_with_user_errors::<Vec<ContractHash>>(
ARG_CONTRACT_WHITELIST,
NFTCoreError::InvalidContractWhitelist,
)
.unwrap_or_default();
for contract_hash in new_contract_whitelist.iter() {
new_acl_whitelist.push(Key::from(*contract_hash));
}
if !new_acl_whitelist.is_empty() {
let whitelist_mode: WhitelistMode = utils::get_stored_value_with_user_errors::<u8>(
WHITELIST_MODE,
NFTCoreError::MissingWhitelistMode,
NFTCoreError::InvalidWhitelistMode,
)
.try_into()
.unwrap_or_revert();
match whitelist_mode {
WhitelistMode::Unlocked => {
// Clear acl whitelist
runtime::remove_key(ACL_WHITELIST);
storage::new_dictionary(ACL_WHITELIST)
.unwrap_or_revert_with(NFTCoreError::FailedToCreateDictionary);
// Update acl whitelist
for key in new_acl_whitelist.iter() {
utils::upsert_dictionary_value_from_key(
ACL_WHITELIST,
&utils::encode_dictionary_item_key(*key),
true,
);
}
}
WhitelistMode::Locked => runtime::revert(NFTCoreError::InvalidWhitelistMode),
}
}
let events_mode: EventsMode = utils::get_stored_value_with_user_errors::<u8>(
EVENTS_MODE,
NFTCoreError::MissingEventsMode,
NFTCoreError::InvalidEventsMode,
)
.try_into()
.unwrap_or_revert();
// Emit VariablesSet event.
match events_mode {
EventsMode::NoEvents => {}
EventsMode::CEP47 => record_cep47_event_dictionary(CEP47Event::VariablesSet),
EventsMode::CES => casper_event_standard::emit(VariablesSet::new()),
}
}
// Mints a new token. Minting will fail if allow_minting is set to false.
#[no_mangle]
pub extern "C" fn mint() {
// The contract owner can toggle the minting behavior on and off over time.
// The contract is toggled on by default.
let minting_status = utils::get_stored_value_with_user_errors::<bool>(
ALLOW_MINTING,
NFTCoreError::MissingAllowMinting,
NFTCoreError::InvalidAllowMinting,
);
// If contract minting behavior is currently toggled off we revert.
if !minting_status {
runtime::revert(NFTCoreError::MintingIsPaused);
}
let total_token_supply = utils::get_stored_value_with_user_errors::<u64>(
TOTAL_TOKEN_SUPPLY,
NFTCoreError::MissingTotalTokenSupply,
NFTCoreError::InvalidTotalTokenSupply,
);
// The minted_tokens_count is the number of minted tokens so far.
let minted_tokens_count = utils::get_stored_value_with_user_errors::<u64>(
NUMBER_OF_MINTED_TOKENS,
NFTCoreError::MissingNumberOfMintedTokens,
NFTCoreError::InvalidNumberOfMintedTokens,
);
// Revert if the token supply has been exhausted.
if minted_tokens_count >= total_token_supply {
runtime::revert(NFTCoreError::TokenSupplyDepleted);
}
let minting_mode: MintingMode = utils::get_stored_value_with_user_errors::<u8>(
MINTING_MODE,
NFTCoreError::MissingMintingMode,
NFTCoreError::InvalidMintingMode,
)
.try_into()
.unwrap_or_revert();
let (caller, contract_package): (Key, Option<Key>) =
match utils::get_verified_caller().unwrap_or_revert() {
Caller::Session(account_hash) => (account_hash.into(), None),
Caller::StoredCaller(contract_hash, contract_package_hash) => {
(contract_hash.into(), Some(contract_package_hash.into()))
}
};
// Revert if minting is private and caller is not installer.
if MintingMode::Installer == minting_mode {
match caller.tag() {
KeyTag::Account => {
let installer_account = runtime::get_key(INSTALLER)
.unwrap_or_revert_with(NFTCoreError::MissingInstallerKey)
.into_account()
.unwrap_or_revert_with(NFTCoreError::FailedToConvertToAccountHash);
// Revert if private minting is required and caller is not installer.
if runtime::get_caller() != installer_account {
runtime::revert(NFTCoreError::InvalidMinter)
}
}
_ => runtime::revert(NFTCoreError::InvalidKey),
}
}
// Revert if minting is acl and caller is not whitelisted.
if MintingMode::Acl == minting_mode {
let acl_package_mode: bool = utils::get_stored_value_with_user_errors::<bool>(
ACL_PACKAGE_MODE,
NFTCoreError::MissingACLPackageMode,
NFTCoreError::InvalidACLPackageMode,
);
let is_whitelisted = match (acl_package_mode, contract_package) {
(true, Some(contract_package)) => utils::get_dictionary_value_from_key::<bool>(
ACL_WHITELIST,
&utils::encode_dictionary_item_key(contract_package),
)
.unwrap_or_default(),
_ => utils::get_dictionary_value_from_key::<bool>(
ACL_WHITELIST,
&utils::encode_dictionary_item_key(caller),
)
.unwrap_or_default(),
};
match caller.tag() {
KeyTag::Hash => {
if !is_whitelisted {
runtime::revert(NFTCoreError::UnlistedContractHash)
}
}
KeyTag::Account => {
if !is_whitelisted {
runtime::revert(NFTCoreError::InvalidMinter);
}
}
_ => runtime::revert(NFTCoreError::InvalidKey),
}
}
let metadata_kinds: BTreeMap<NFTMetadataKind, Requirement> =
utils::get_stored_value_with_user_errors(
NFT_METADATA_KINDS,
NFTCoreError::MissingNFTMetadataKind,
NFTCoreError::InvalidNFTMetadataKind,
);
let token_metadata = utils::get_named_arg_with_user_errors::<String>(
ARG_TOKEN_META_DATA,
NFTCoreError::MissingTokenMetaData,
NFTCoreError::InvalidTokenMetaData,
)
.unwrap_or_revert();
let identifier_mode: NFTIdentifierMode = utils::get_stored_value_with_user_errors::<u8>(
IDENTIFIER_MODE,
NFTCoreError::MissingIdentifierMode,
NFTCoreError::InvalidIdentifierMode,
)
.try_into()
.unwrap_or_revert();
// This is the token ID.
let optional_token_hash: String = utils::get_optional_named_arg_with_user_errors::<String>(
ARG_TOKEN_HASH,
NFTCoreError::InvalidIdentifier,
)
.unwrap_or_default();
let token_identifier: TokenIdentifier = match identifier_mode {
NFTIdentifierMode::Ordinal => TokenIdentifier::Index(minted_tokens_count),
NFTIdentifierMode::Hash => TokenIdentifier::Hash(if optional_token_hash.is_empty() {
base16::encode_lower(&runtime::blake2b(token_metadata.clone()))
} else {
optional_token_hash
}),
};
for (metadata_kind, required) in metadata_kinds {
if required == Requirement::Unneeded {
continue;
}
let token_metadata_validation =
metadata::validate_metadata(&metadata_kind, token_metadata.clone());
match token_metadata_validation {
Ok(validated_token_metadata) => {
utils::upsert_dictionary_value_from_key(
&metadata::get_metadata_dictionary_name(&metadata_kind),
&token_identifier.get_dictionary_item_key(),
validated_token_metadata,
);
}
Err(err) => {
if required == Requirement::Required {
runtime::revert(err);
}
}
}
}
// The contract's ownership behavior (determined at installation) determines,
// who owns the NFT we are about to mint.()
let ownership_mode = utils::get_ownership_mode().unwrap_or_revert();
let token_owner_key: Key =
if let OwnershipMode::Assigned | OwnershipMode::Transferable = ownership_mode {
runtime::get_named_arg(ARG_TOKEN_OWNER)
} else {
caller
};
utils::upsert_dictionary_value_from_key(
TOKEN_OWNERS,
&token_identifier.get_dictionary_item_key(),
token_owner_key,
);
utils::upsert_dictionary_value_from_key(
TOKEN_ISSUERS,
&token_identifier.get_dictionary_item_key(),
caller,
);
let owned_tokens_item_key = utils::encode_dictionary_item_key(token_owner_key);
if let NFTIdentifierMode::Hash = identifier_mode {
// Update the forward and reverse trackers
utils::insert_hash_id_lookups(minted_tokens_count, token_identifier.clone());
}
//Increment the count of owned tokens.
let updated_token_count =
match utils::get_dictionary_value_from_key::<u64>(TOKEN_COUNT, &owned_tokens_item_key) {
Some(balance) => balance + 1u64,
None => 1u64,
};
utils::upsert_dictionary_value_from_key(
TOKEN_COUNT,
&owned_tokens_item_key,
updated_token_count,
);
// Increment number_of_minted_tokens by one
let number_of_minted_tokens_uref = utils::get_uref(
NUMBER_OF_MINTED_TOKENS,
NFTCoreError::MissingTotalTokenSupply,
NFTCoreError::InvalidTotalTokenSupply,
);
storage::write(number_of_minted_tokens_uref, minted_tokens_count + 1u64);
// Emit Mint event.
let events_mode: EventsMode =
EventsMode::try_from(utils::get_stored_value_with_user_errors::<u8>(
EVENTS_MODE,
NFTCoreError::MissingEventsMode,
NFTCoreError::InvalidEventsMode,
))
.unwrap_or_revert();
match events_mode {
EventsMode::NoEvents => {}
EventsMode::CES => casper_event_standard::emit(Mint::new(
token_owner_key,
token_identifier.clone(),
token_metadata,
)),
EventsMode::CEP47 => record_cep47_event_dictionary(CEP47Event::Mint {
recipient: token_owner_key,
token_id: token_identifier.clone(),
}),
}
if let OwnerReverseLookupMode::Complete = utils::get_reporting_mode() {
if (NFTIdentifierMode::Hash == identifier_mode)
&& runtime::get_key(OWNED_TOKENS).is_some()
&& utils::should_migrate_token_hashes(token_owner_key)
{
utils::migrate_token_hashes(token_owner_key)
}
let (page_table_entry, page_uref) = utils::add_page_entry_and_page_record(
minted_tokens_count,
&owned_tokens_item_key,
true,
);
let receipt_string = utils::get_receipt_name(page_table_entry);
let receipt_address = Key::dictionary(page_uref, owned_tokens_item_key.as_bytes());
let token_identifier_string = token_identifier.get_dictionary_item_key();
let receipt = CLValue::from_t((receipt_string, receipt_address, token_identifier_string))
.unwrap_or_revert_with(NFTCoreError::FailedToConvertToCLValue);
runtime::ret(receipt)
}
}
// Marks token as burnt. This blocks any future call to transfer token.
#[no_mangle]
pub extern "C" fn burn() {
if let BurnMode::NonBurnable = utils::get_burn_mode() {
runtime::revert(NFTCoreError::InvalidBurnMode)
}
let identifier_mode: NFTIdentifierMode = utils::get_stored_value_with_user_errors::<u8>(
IDENTIFIER_MODE,
NFTCoreError::MissingIdentifierMode,
NFTCoreError::InvalidIdentifierMode,
)
.try_into()
.unwrap_or_revert();
let token_identifier = utils::get_token_identifier_from_runtime_args(&identifier_mode);
let (caller, contract_package): (Key, Option<Key>) =
match utils::get_verified_caller().unwrap_or_revert() {
Caller::Session(account_hash) => (account_hash.into(), None),
Caller::StoredCaller(contract_hash, contract_package_hash) => {
(contract_hash.into(), Some(contract_package_hash.into()))
}
};
let token_owner = match utils::get_dictionary_value_from_key::<Key>(
TOKEN_OWNERS,
&token_identifier.get_dictionary_item_key(),
) {
Some(owner) => owner,
None => runtime::revert(NFTCoreError::MissingOwnerTokenIdentifierKey),
};
// Check if caller is owner
let is_owner = token_owner == caller;
// Check if caller is operator to execute burn
let is_operator = if !is_owner {
let owner_operator_item_key = utils::encode_key_and_value(&token_owner, &caller);
utils::get_dictionary_value_from_key::<bool>(OPERATORS, &owner_operator_item_key)
.unwrap_or_default()
} else {
false
};
// With operator package mode check if caller's package is operator to let contract execute burn
let is_package_operator = if !is_owner && !is_operator {
match (
utils::get_stored_value_with_user_errors::<bool>(
PACKAGE_OPERATOR_MODE,
NFTCoreError::MissingPackageOperatorMode,
NFTCoreError::InvalidPackageOperatorMode,
),
contract_package,
) {
(true, Some(contract_package)) => {
let owner_operator_item_key =
utils::encode_key_and_value(&token_owner, &contract_package);
utils::get_dictionary_value_from_key::<bool>(OPERATORS, &owner_operator_item_key)
.unwrap_or_default()
}
_ => false,
}
} else {
false
};
// Revert if caller is not token_owner nor operator for the owner
if !is_owner && !is_operator && !is_package_operator {
runtime::revert(NFTCoreError::InvalidTokenOwner)
};
// It makes sense to keep this token as owned by the caller. It just happens that the caller
// owns a burnt token. That's all. Similarly, we should probably also not change the
// owned_tokens dictionary.
if utils::is_token_burned(&token_identifier) {
runtime::revert(NFTCoreError::PreviouslyBurntToken)
}
// Mark the token as burnt by adding the token_id to the burnt tokens dictionary.
utils::upsert_dictionary_value_from_key::<()>(
BURNT_TOKENS,
&token_identifier.get_dictionary_item_key(),
(),
);
let owned_tokens_item_key = utils::encode_dictionary_item_key(token_owner);
let updated_balance =
match utils::get_dictionary_value_from_key::<u64>(TOKEN_COUNT, &owned_tokens_item_key) {
Some(balance) => {
if balance > 0u64 {
balance - 1u64
} else {
// This should never happen if contract is implemented correctly.
runtime::revert(NFTCoreError::FatalTokenIdDuplication);
}
}
None => {
// This should never happen if contract is implemented correctly.
runtime::revert(NFTCoreError::FatalTokenIdDuplication);
}
};
utils::upsert_dictionary_value_from_key(TOKEN_COUNT, &owned_tokens_item_key, updated_balance);
// Emit Burn event.
let events_mode: EventsMode =
EventsMode::try_from(utils::get_stored_value_with_user_errors::<u8>(
EVENTS_MODE,
NFTCoreError::MissingEventsMode,
NFTCoreError::InvalidEventsMode,
))
.unwrap_or_revert();
match events_mode {
EventsMode::NoEvents => {}
EventsMode::CES => {
casper_event_standard::emit(Burn::new(token_owner, token_identifier, caller))
}
EventsMode::CEP47 => record_cep47_event_dictionary(CEP47Event::Burn {
owner: token_owner,
token_id: token_identifier,
burner: caller,
}),
}
}
// Marks an account as approved for an identified token transfer