difftreelog
Add economic model POC
in: master
5 files changed
Cargo.lockdiffbeforeafterboth--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3085,10 +3085,12 @@
dependencies = [
"frame-support",
"frame-system",
+ "pallet-transaction-payment",
"parity-scale-codec",
"sp-core",
"sp-io",
"sp-runtime",
+ "sp-std",
]
[[package]]
doc/application_development.mddiffbeforeafterboth--- a/doc/application_development.md
+++ b/doc/application_development.md
@@ -16,6 +16,54 @@
+## Custom Types for JS API
+
+```
+{
+ "Schedule": {
+ "version": "u32",
+ "put_code_per_byte_cost": "Gas",
+ "grow_mem_cost": "Gas",
+ "regular_op_cost": "Gas",
+ "return_data_per_byte_cost": "Gas",
+ "event_data_per_byte_cost": "Gas",
+ "event_per_topic_cost": "Gas",
+ "event_base_cost": "Gas",
+ "call_base_cost": "Gas",
+ "instantiate_base_cost": "Gas",
+ "dispatch_base_cost": "Gas",
+ "sandbox_data_read_cost": "Gas",
+ "sandbox_data_write_cost": "Gas",
+ "transfer_cost": "Gas",
+ "instantiate_cost": "Gas",
+ "max_event_topics": "u32",
+ "max_stack_height": "u32",
+ "max_memory_pages": "u32",
+ "max_table_size": "u32",
+ "enable_println": "bool",
+ "max_subject_len": "u32"
+ },
+ "NftItemType": {
+ "Collection": "u64",
+ "Owner": "AccountId",
+ "Data": "Vec<u8>"
+ },
+ "CollectionType": {
+ "Owner": "AccountId",
+ "NextItemId": "u64",
+ "Name": "Vec<u16>",
+ "Description": "Vec<u16>",
+ "TokenPrefix": "Vec<u8>",
+ "CustomDataSize": "u32",
+ "Sponsor": "AccountId",
+ "UnconfirmedSponsor": "AccountId"
+ },
+ "Address": "AccountId",
+ "LookupSource": "AccountId",
+ "Weight": "u64"
+}
+```
+
## NFT Palette Methods
### Collection Management
pallets/nft/Cargo.tomldiffbeforeafterboth33branch = 'rc4_ext_dispatch_reenabled'33branch = 'rc4_ext_dispatch_reenabled'34version = '2.0.0-rc4'34version = '2.0.0-rc4'3536[dependencies.sp-std]37default-features = false38git = 'https://github.com/usetech-llc/substrate.git'39branch = 'rc4_ext_dispatch_reenabled'40version = '2.0.0-rc4'4142[dependencies.transaction-payment]43default-features = false44git = 'https://github.com/usetech-llc/substrate.git'45package = 'pallet-transaction-payment'46branch = 'rc4_ext_dispatch_reenabled'47version = '2.0.0-rc4'354836[package]49[package]37authors = ['Substrate DevHub <https://github.com/substrate-developer-hub>']50authors = ['Substrate DevHub <https://github.com/substrate-developer-hub>']52 'frame-support/std',65 'frame-support/std',53 'frame-system/std',66 'frame-system/std',54 'sp-runtime/std',67 'sp-runtime/std',68 'sp-std/std',55]69]5670pallets/nft/src/lib.rsdiffbeforeafterboth--- a/pallets/nft/src/lib.rs
+++ b/pallets/nft/src/lib.rs
@@ -9,9 +9,32 @@
/// For more guidance on Substrate FRAME, see the example pallet
/// https://github.com/paritytech/substrate/blob/master/frame/example/src/lib.rs
-use frame_support::{decl_event, decl_module, decl_storage, dispatch::DispatchResult, ensure};
+pub use frame_support::{
+ decl_event, decl_module, decl_storage,
+ construct_runtime, parameter_types,
+ traits::{Currency, Get, ExistenceRequirement, KeyOwnerProofSystem, OnUnbalanced, Randomness, WithdrawReason, Imbalance},
+ weights::{
+ DispatchInfo, PostDispatchInfo, constants::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight, WEIGHT_PER_SECOND},
+ IdentityFee, Weight, WeightToFeePolynomial, GetDispatchInfo, Pays,
+ },
+ StorageValue,
+ dispatch::DispatchResult,
+ IsSubType,
+ ensure
+};
+
use frame_system::{self as system, ensure_signed};
use sp_runtime::sp_std::prelude::Vec;
+use sp_std::prelude::*;
+use sp_runtime::{
+ FixedU128, FixedPointOperand,
+ transaction_validity::{
+ TransactionPriority, ValidTransaction, InvalidTransaction, TransactionValidityError, TransactionValidity
+ },
+ traits::{
+ Saturating, Dispatchable, DispatchInfoOf, PostDispatchInfoOf, SignedExtension, Zero, SaturatedConversion,
+ },
+};
#[cfg(test)]
mod mock;
@@ -28,6 +51,8 @@
pub description: Vec<u16>, // 256 include null escape char
pub token_prefix: Vec<u8>, // 16 include null escape char
pub custom_data_size: u32,
+ pub sponsor: AccountId, // Who pays fees. If set to default address, the fees are applied to the transaction sender
+ pub unconfirmed_sponsor: AccountId, // Sponsor address that has not yet confirmed sponsorship
}
#[derive(Encode, Decode, Default, Clone, PartialEq)]
@@ -51,6 +76,7 @@
/// The overarching event type.
type Event: From<Event<Self>> + Into<<Self as system::Trait>::Event>;
+
}
// This pallet's storage items.
@@ -138,6 +164,8 @@
token_prefix: prefix,
next_item_id: next_id,
custom_data_size: custom_data_sz,
+ sponsor: T::AccountId::default(),
+ unconfirmed_sponsor: T::AccountId::default(),
};
// Add new collection to map
@@ -237,6 +265,54 @@
}
#[weight = 0]
+ pub fn set_collection_sponsor(origin, collection_id: u64, new_sponsor: T::AccountId) -> DispatchResult {
+
+ let sender = ensure_signed(origin)?;
+ ensure!(<Collection<T>>::contains_key(collection_id), "This collection does not exist");
+
+ let mut target_collection = <Collection<T>>::get(collection_id);
+ ensure!(sender == target_collection.owner, "You do not own this collection");
+
+ target_collection.unconfirmed_sponsor = new_sponsor;
+ <Collection<T>>::insert(collection_id, target_collection);
+
+ Ok(())
+ }
+
+ #[weight = 0]
+ pub fn confirm_sponsorship(origin, collection_id: u64) -> DispatchResult {
+
+ let sender = ensure_signed(origin)?;
+ ensure!(<Collection<T>>::contains_key(collection_id), "This collection does not exist");
+
+ let mut target_collection = <Collection<T>>::get(collection_id);
+ ensure!(sender == target_collection.unconfirmed_sponsor, "This address is not set as sponsor, use setCollectionSponsor first");
+
+ target_collection.sponsor = target_collection.unconfirmed_sponsor;
+ target_collection.unconfirmed_sponsor = T::AccountId::default();
+ <Collection<T>>::insert(collection_id, target_collection);
+
+ Ok(())
+ }
+
+ #[weight = 0]
+ pub fn remove_collection_sponsor(origin, collection_id: u64) -> DispatchResult {
+
+ let sender = ensure_signed(origin)?;
+ ensure!(<Collection<T>>::contains_key(collection_id), "This collection does not exist");
+
+ let mut target_collection = <Collection<T>>::get(collection_id);
+ ensure!(sender == target_collection.owner, "You do not own this collection");
+
+ target_collection.sponsor = T::AccountId::default();
+ <Collection<T>>::insert(collection_id, target_collection);
+
+ Ok(())
+ }
+
+
+
+ #[weight = 0]
pub fn create_item(origin, collection_id: u64, properties: Vec<u8>) -> DispatchResult {
let sender = ensure_signed(origin)?;
@@ -490,3 +566,185 @@
Ok(())
}
}
+
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// Economic models
+
+/// Fee multiplier.
+pub type Multiplier = FixedU128;
+
+type BalanceOf<T> =
+ <<T as transaction_payment::Trait>::Currency as Currency<<T as system::Trait>::AccountId>>::Balance;
+type NegativeImbalanceOf<T> = <<T as transaction_payment::Trait>::Currency as Currency<
+ <T as system::Trait>::AccountId,>>::NegativeImbalance;
+
+
+
+/// Require the transactor pay for themselves and maybe include a tip to gain additional priority
+/// in the queue.
+#[derive(Encode, Decode, Clone, Eq, PartialEq)]
+pub struct ChargeTransactionPayment<T: transaction_payment::Trait + Send + Sync>(#[codec(compact)] BalanceOf<T>);
+
+impl<T:Trait + transaction_payment::Trait + Send + Sync> sp_std::fmt::Debug for ChargeTransactionPayment<T> {
+ #[cfg(feature = "std")]
+ fn fmt(&self, f: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {
+ write!(f, "ChargeTransactionPayment<{:?}>", self.0)
+ }
+ #[cfg(not(feature = "std"))]
+ fn fmt(&self, _: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {
+ Ok(())
+ }
+}
+
+impl<T:Trait + transaction_payment::Trait + Send + Sync> ChargeTransactionPayment<T> where
+ T::Call: Dispatchable<Info=DispatchInfo, PostInfo=PostDispatchInfo> + IsSubType<Module<T>, T>,
+ BalanceOf<T>: Send + Sync + FixedPointOperand,
+{
+ /// utility constructor. Used only in client/factory code.
+ pub fn from(fee: BalanceOf<T>) -> Self {
+ Self(fee)
+ }
+
+ pub fn traditional_fee(
+ len: usize,
+ info: &DispatchInfoOf<T::Call>,
+ tip: BalanceOf<T>,
+ ) -> BalanceOf<T> where
+ T::Call: Dispatchable<Info=DispatchInfo>,
+ {
+ <transaction_payment::Module<T>>::compute_fee(len as u32, info, tip)
+ }
+
+ fn withdraw_fee(
+ &self,
+ who: &T::AccountId,
+ call: &T::Call,
+ info: &DispatchInfoOf<T::Call>,
+ len: usize,
+ ) -> Result<(BalanceOf<T>, Option<NegativeImbalanceOf<T>>), TransactionValidityError> {
+ let tip = self.0;
+
+ // Set fee based on call type. Creating collection costs 1 Unique.
+ // All other transactions have traditional fees so far
+ let fee = match call.is_sub_type() {
+ Some(Call::create_collection(..)) => <BalanceOf<T>>::from(1_000_000_000),
+ _ => Self::traditional_fee(len, info, tip)
+
+ // Flat fee model, use only for testing purposes
+ // _ => <BalanceOf<T>>::from(100)
+ };
+
+ // Determine who is paying transaction fee based on ecnomic model
+ // Parse call to extract collection ID and access collection sponsor
+ let sponsor: T::AccountId = match call.is_sub_type() {
+ Some(Call::create_item(collection_id, _properties)) => {
+ <Collection<T>>::get(collection_id).sponsor
+ },
+ Some(Call::transfer(collection_id, _item_id, _new_owner)) => {
+ <Collection<T>>::get(collection_id).sponsor
+ },
+
+ _ => T::AccountId::default()
+ };
+
+ let mut who_pays_fee: T::AccountId = sponsor.clone();
+ if sponsor == T::AccountId::default() {
+ who_pays_fee = who.clone();
+ }
+
+ // Only mess with balances if fee is not zero.
+ if fee.is_zero() {
+ return Ok((fee, None));
+ }
+
+ match <T as transaction_payment::Trait>::Currency::withdraw(
+ &who_pays_fee,
+ fee,
+ if tip.is_zero() {
+ WithdrawReason::TransactionPayment.into()
+ } else {
+ WithdrawReason::TransactionPayment | WithdrawReason::Tip
+ },
+ ExistenceRequirement::KeepAlive,
+ ) {
+ Ok(imbalance) => Ok((fee, Some(imbalance))),
+ Err(_) => Err(InvalidTransaction::Payment.into()),
+ }
+ }
+}
+
+impl<T:Trait + transaction_payment::Trait + Send + Sync> SignedExtension for ChargeTransactionPayment<T> where
+ BalanceOf<T>: Send + Sync + From<u64> + FixedPointOperand,
+ T::Call: Dispatchable<Info=DispatchInfo, PostInfo=PostDispatchInfo> + IsSubType<Module<T>, T>,
+{
+ const IDENTIFIER: &'static str = "ChargeTransactionPayment";
+ type AccountId = T::AccountId;
+ type Call = T::Call;
+ type AdditionalSigned = ();
+ type Pre = (BalanceOf<T>, Self::AccountId, Option<NegativeImbalanceOf<T>>, BalanceOf<T>);
+ fn additional_signed(&self) -> sp_std::result::Result<(), TransactionValidityError> { Ok(()) }
+
+ fn validate(
+ &self,
+ who: &Self::AccountId,
+ call: &Self::Call,
+ info: &DispatchInfoOf<Self::Call>,
+ len: usize,
+ ) -> TransactionValidity {
+ let (fee, _) = self.withdraw_fee(who, call, info, len)?;
+
+ let mut r = ValidTransaction::default();
+ // NOTE: we probably want to maximize the _fee (of any type) per weight unit_ here, which
+ // will be a bit more than setting the priority to tip. For now, this is enough.
+ r.priority = fee.saturated_into::<TransactionPriority>();
+ Ok(r)
+ }
+
+ fn pre_dispatch(
+ self,
+ who: &Self::AccountId,
+ call: &Self::Call,
+ info: &DispatchInfoOf<Self::Call>,
+ len: usize
+ ) -> Result<Self::Pre, TransactionValidityError> {
+ let (fee, imbalance) = self.withdraw_fee(who, call, info, len)?;
+ Ok((self.0, who.clone(), imbalance, fee))
+ }
+
+ fn post_dispatch(
+ pre: Self::Pre,
+ info: &DispatchInfoOf<Self::Call>,
+ post_info: &PostDispatchInfoOf<Self::Call>,
+ len: usize,
+ _result: &DispatchResult,
+ ) -> Result<(), TransactionValidityError> {
+ let (tip, who, imbalance, fee) = pre;
+ if let Some(payed) = imbalance {
+ let actual_fee = <transaction_payment::Module<T>>::compute_actual_fee(
+ len as u32,
+ info,
+ post_info,
+ tip,
+ );
+ let refund = fee.saturating_sub(actual_fee);
+ let actual_payment = match <T as transaction_payment::Trait>::Currency::deposit_into_existing(&who, refund) {
+ Ok(refund_imbalance) => {
+ // The refund cannot be larger than the up front payed max weight.
+ // `PostDispatchInfo::calc_unspent` guards against such a case.
+ match payed.offset(refund_imbalance) {
+ Ok(actual_payment) => actual_payment,
+ Err(_) => return Err(InvalidTransaction::Payment.into()),
+ }
+ }
+ // We do not recreate the account using the refund. The up front payment
+ // is gone in that case.
+ Err(_) => payed,
+ };
+ let imbalances = actual_payment.split(tip);
+ <T as transaction_payment::Trait>::OnTransactionPayment::on_unbalanceds(Some(imbalances.0).into_iter()
+ .chain(Some(imbalances.1)));
+ }
+ Ok(())
+ }
+}
runtime/src/lib.rsdiffbeforeafterboth--- a/runtime/src/lib.rs
+++ b/runtime/src/lib.rs
@@ -14,13 +14,13 @@
use sp_api::impl_runtime_apis;
use sp_consensus_aura::sr25519::AuthorityId as AuraId;
use sp_core::{crypto::KeyTypeId, OpaqueMetadata};
-use sp_runtime::traits::{
- BlakeTwo256, Block as BlockT, IdentifyAccount, IdentityLookup, NumberFor, Saturating, Verify,
-};
use sp_runtime::{
create_runtime_str, generic, impl_opaque_keys,
transaction_validity::{TransactionSource, TransactionValidity},
ApplyExtrinsicResult, MultiSignature,
+ traits::{
+ BlakeTwo256, Block as BlockT, IdentifyAccount, IdentityLookup, NumberFor, Saturating, Verify,
+ },
};
use sp_std::prelude::*;
#[cfg(feature = "std")]
@@ -32,16 +32,22 @@
pub use contracts::Schedule as ContractsSchedule;
pub use frame_support::{
construct_runtime, parameter_types,
- traits::{KeyOwnerProofSystem, Randomness},
+ traits::{Currency, Get, ExistenceRequirement, KeyOwnerProofSystem, OnUnbalanced, Randomness, WithdrawReason},
weights::{
- constants::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight, WEIGHT_PER_SECOND},
- IdentityFee, Weight,
+ DispatchInfo, PostDispatchInfo, constants::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight, WEIGHT_PER_SECOND},
+ IdentityFee, Weight, WeightToFeePolynomial, GetDispatchInfo, Pays,
},
StorageValue,
+ dispatch::DispatchResult,
};
+use system::{self as system};
#[cfg(any(feature = "std", test))]
pub use sp_runtime::BuildStorage;
-pub use sp_runtime::{Perbill, Permill};
+use sp_runtime::{
+ Perbill,
+};
+
+
pub use timestamp::Call as TimestampCall;
/// Importing a nft pallet
@@ -228,7 +234,8 @@
}
parameter_types! {
- pub const ExistentialDeposit: u128 = 500;
+ // pub const ExistentialDeposit: u128 = 500;
+ pub const ExistentialDeposit: u128 = 0;
}
impl balances::Trait for Runtime {
@@ -331,7 +338,7 @@
system::CheckEra<Runtime>,
system::CheckNonce<Runtime>,
system::CheckWeight<Runtime>,
- transaction_payment::ChargeTransactionPayment<Runtime>,
+ nft::ChargeTransactionPayment<Runtime>,
);
/// Unchecked extrinsic type as expected by this runtime.
pub type UncheckedExtrinsic = generic::UncheckedExtrinsic<Address, Call, Signature, SignedExtra>;
@@ -486,3 +493,4 @@
}
}
}
+