git.delta.rocks / unique-network / refs/commits / 6c48590c156a

--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2169,7 +2169,7 @@
 
 [[package]]
 name = "evm-coder"
-version = "0.1.1"
+version = "0.1.3"
 dependencies = [
  "ethereum",
  "evm-coder-procedural",
@@ -2178,6 +2178,7 @@
  "hex-literal",
  "impl-trait-for-tuples",
  "primitive-types",
+ "sp-std",
 ]
 
 [[package]]
@@ -5748,7 +5749,7 @@
 
 [[package]]
 name = "pallet-fungible"
-version = "0.1.4"
+version = "0.1.5"
 dependencies = [
  "ethereum",
  "evm-coder",

--- a/crates/evm-coder/CHANGELOG.md
+++ b/crates/evm-coder/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 All notable changes to this project will be documented in this file.
 
+## [0.1.3] - 2022-08-29
+
+### Fixed
+
+ - Parsing simple values.
+
 <!-- bureaucrate goes here -->
 ## [v0.1.2] 2022-08-19
 
@@ -21,4 +27,4 @@
 
 - build: Upgrade polkadot to v0.9.26 85515e54c4ca1b82a2630034e55dcc804c643bf8
 
-- build: Upgrade polkadot to v0.9.25 cdfb9bdc7b205ff1b5134f034ef9973d769e5e6b
\ No newline at end of file
+- build: Upgrade polkadot to v0.9.25 cdfb9bdc7b205ff1b5134f034ef9973d769e5e6b

--- a/crates/evm-coder/Cargo.toml
+++ b/crates/evm-coder/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "evm-coder"
-version = "0.1.1"
+version = "0.1.3"
 license = "GPLv3"
 edition = "2021"
 
@@ -11,8 +11,9 @@
 primitive-types = { version = "0.11.1", default-features = false }
 # Evm doesn't have reexports for log and others
 ethereum = { version = "0.12.0", default-features = false }
+sp-std = { default-features = false, git = "https://github.com/paritytech/substrate", branch = "polkadot-v0.9.27" }
 # Error types for execution
-evm-core = { default-features = false, git = "https://github.com/uniquenetwork/evm", branch = "unique-polkadot-v0.9.27" }
+evm-core = { default-features = false , git = "https://github.com/uniquenetwork/evm", branch = "unique-polkadot-v0.9.27" }
 # We have tuple-heavy code in solidity.rs
 impl-trait-for-tuples = "0.2.2"
 

--- a/crates/evm-coder/src/abi.rs
+++ b/crates/evm-coder/src/abi.rs
@@ -31,6 +31,10 @@
 
 const ABI_ALIGNMENT: usize = 32;
 
+trait TypeHelper {
+	fn is_dynamic() -> bool;
+}
+
 /// View into RLP data, which provides method to read typed items from it
 #[derive(Clone)]
 pub struct AbiReader<'i> {
@@ -77,8 +81,8 @@
 			return Err(Error::Error(ExitError::OutOfOffset));
 		}
 		let mut block = [0; S];
-		// Verify padding is empty
-		if !buf[pad_start..pad_size].iter().all(|&v| v == 0) {
+		let is_pad_zeroed = buf[pad_start..pad_size].iter().all(|&v| v == 0);
+		if !is_pad_zeroed {
 			return Err(Error::Error(ExitError::InvalidRange));
 		}
 		block.copy_from_slice(&buf[block_start..block_size]);
@@ -133,7 +137,7 @@
 
 	/// Read [`Vec<u8>`] at current position, then advance
 	pub fn bytes(&mut self) -> Result<Vec<u8>> {
-		let mut subresult = self.subresult()?;
+		let mut subresult = self.subresult(None)?;
 		let length = subresult.uint32()? as usize;
 		if subresult.buf.len() < subresult.offset + length {
 			return Err(Error::Error(ExitError::OutOfOffset));
@@ -179,15 +183,26 @@
 	}
 
 	/// Slice recursive buffer, advance one word for buffer offset
-	fn subresult(&mut self) -> Result<AbiReader<'i>> {
-		let offset = self.uint32()? as usize;
+	/// If `size` is [`None`] then [`Self::offset`] and [`Self::subresult_offset`] evals from [`Self::buf`].
+	fn subresult(&mut self, size: Option<usize>) -> Result<AbiReader<'i>> {
+		let subresult_offset = self.subresult_offset;
+		let offset = if let Some(size) = size {
+			self.offset += size;
+			self.subresult_offset += size;
+			0
+		} else {
+			self.uint32()? as usize
+		};
+
 		if offset + self.subresult_offset > self.buf.len() {
 			return Err(Error::Error(ExitError::InvalidRange));
 		}
+
+		let new_offset = offset + subresult_offset;
 		Ok(AbiReader {
 			buf: self.buf,
-			subresult_offset: offset + self.subresult_offset,
-			offset: offset + self.subresult_offset,
+			subresult_offset: new_offset,
+			offset: new_offset,
 		})
 	}
 
@@ -318,28 +333,40 @@
 pub trait AbiRead<T> {
 	/// Read item from current position, advanding decoder
 	fn abi_read(&mut self) -> Result<T>;
+
+	/// Size for type aligned to [`ABI_ALIGNMENT`].
+	fn size() -> usize;
 }
 
 macro_rules! impl_abi_readable {
-	($ty:ty, $method:ident) => {
+	($ty:ty, $method:ident, $dynamic:literal) => {
+		impl TypeHelper for $ty {
+			fn is_dynamic() -> bool {
+				$dynamic
+			}
+		}
 		impl AbiRead<$ty> for AbiReader<'_> {
 			fn abi_read(&mut self) -> Result<$ty> {
 				self.$method()
 			}
+
+			fn size() -> usize {
+				ABI_ALIGNMENT
+			}
 		}
 	};
 }
 
-impl_abi_readable!(u8, uint8);
-impl_abi_readable!(u32, uint32);
-impl_abi_readable!(u64, uint64);
-impl_abi_readable!(u128, uint128);
-impl_abi_readable!(U256, uint256);
-impl_abi_readable!([u8; 4], bytes4);
-impl_abi_readable!(H160, address);
-impl_abi_readable!(Vec<u8>, bytes);
-impl_abi_readable!(bool, bool);
-impl_abi_readable!(string, string);
+impl_abi_readable!(u8, uint8, false);
+impl_abi_readable!(u32, uint32, false);
+impl_abi_readable!(u64, uint64, false);
+impl_abi_readable!(u128, uint128, false);
+impl_abi_readable!(U256, uint256, false);
+impl_abi_readable!([u8; 4], bytes4, false);
+impl_abi_readable!(H160, address, false);
+impl_abi_readable!(Vec<u8>, bytes, true);
+impl_abi_readable!(bool, bool, true);
+impl_abi_readable!(string, string, true);
 
 mod sealed {
 	/// Not all types can be placed in vec, i.e `Vec<u8>` is restricted, `bytes` should be used instead
@@ -355,7 +382,7 @@
 	Self: AbiRead<R>,
 {
 	fn abi_read(&mut self) -> Result<Vec<R>> {
-		let mut sub = self.subresult()?;
+		let mut sub = self.subresult(None)?;
 		let size = sub.uint32()? as usize;
 		sub.subresult_offset = sub.offset;
 		let mut out = Vec::with_capacity(size);
@@ -364,21 +391,41 @@
 		}
 		Ok(out)
 	}
+
+	fn size() -> usize {
+		ABI_ALIGNMENT
+	}
 }
 
 macro_rules! impl_tuples {
 	($($ident:ident)+) => {
+		impl<$($ident: TypeHelper,)+> TypeHelper for ($($ident,)+) {
+			fn is_dynamic() -> bool {
+				false
+				$(
+					|| <$ident>::is_dynamic()
+				)*
+			}
+		}
 		impl<$($ident),+> sealed::CanBePlacedInVec for ($($ident,)+) {}
 		impl<$($ident),+> AbiRead<($($ident,)+)> for AbiReader<'_>
 		where
-			$(Self: AbiRead<$ident>),+
+			$(
+				Self: AbiRead<$ident>,
+			)+
+			($($ident,)+): TypeHelper,
 		{
 			fn abi_read(&mut self) -> Result<($($ident,)+)> {
-				let mut subresult = self.subresult()?;
+				let size = if !<($($ident,)+)>::is_dynamic() { Some(<Self as AbiRead<($($ident,)+)>>::size()) } else { None };
+				let mut subresult = self.subresult(size)?;
 				Ok((
 					$(<Self as AbiRead<$ident>>::abi_read(&mut subresult)?,)+
 				))
 			}
+
+			fn size() -> usize {
+				0 $(+ <AbiReader<'_> as AbiRead<$ident>>::size())+
+			}
 		}
 		#[allow(non_snake_case)]
 		impl<$($ident),+> AbiWrite for &($($ident,)+)
@@ -535,7 +582,7 @@
 		assert_eq!(encoded, alternative_encoded);
 
 		let mut decoder = AbiReader::new(&encoded);
-		assert_eq!(decoder.bool().unwrap(), true);
+		assert!(decoder.bool().unwrap());
 		assert_eq!(decoder.string().unwrap(), "test");
 	}
 
@@ -604,4 +651,49 @@
 			]
 		);
 	}
+
+	#[test]
+	fn parse_vec_with_simple_type() {
+		use crate::types::address;
+		use primitive_types::{H160, U256};
+
+		let (call, mut decoder) = AbiReader::new_call(&hex!(
+			"
+				1ACF2D55
+				0000000000000000000000000000000000000000000000000000000000000020 // offset of (address, uint256)[]
+				0000000000000000000000000000000000000000000000000000000000000003 // length of (address, uint256)[]
+
+				0000000000000000000000002D2FF76104B7BACB2E8F6731D5BFC184EBECDDBC // address
+				000000000000000000000000000000000000000000000000000000000000000A // uint256
+
+				000000000000000000000000AB8E3D9134955566483B11E6825C9223B6737B10 // address
+				0000000000000000000000000000000000000000000000000000000000000014 // uint256
+
+				0000000000000000000000008C582BDF2953046705FC56F189385255EFC1BE18 // address
+				000000000000000000000000000000000000000000000000000000000000001E // uint256
+			"
+		))
+		.unwrap();
+		assert_eq!(call, u32::to_be_bytes(0x1ACF2D55));
+		let data =
+			<AbiReader<'_> as AbiRead<Vec<(address, uint256)>>>::abi_read(&mut decoder).unwrap();
+		assert_eq!(data.len(), 3);
+		assert_eq!(
+			data,
+			vec![
+				(
+					H160(hex!("2D2FF76104B7BACB2E8F6731D5BFC184EBECDDBC")),
+					U256([10, 0, 0, 0])
+				),
+				(
+					H160(hex!("AB8E3D9134955566483B11E6825C9223B6737B10")),
+					U256([20, 0, 0, 0])
+				),
+				(
+					H160(hex!("8C582BDF2953046705FC56F189385255EFC1BE18")),
+					U256([30, 0, 0, 0])
+				),
+			]
+		);
+	}
 }

--- a/pallets/fungible/CHANGELOG.md
+++ b/pallets/fungible/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 All notable changes to this project will be documented in this file.
 
+
+## [0.1.5] - 2022-08-29
+
+### Added
+
+ - Implementation of `mint` and `mint_bulk` methods for ERC20 API.
+
 ## [v0.1.4] - 2022-08-24
 
 ### Change

--- a/pallets/fungible/Cargo.toml
+++ b/pallets/fungible/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "pallet-fungible"
-version = "0.1.4"
+version = "0.1.5"
 license = "GPLv3"
 edition = "2021"
 

--- a/pallets/fungible/src/erc.rs
+++ b/pallets/fungible/src/erc.rs
@@ -129,8 +129,32 @@
 	}
 }
 
+#[solidity_interface(name = ERC20Mintable)]
+impl<T: Config> FungibleHandle<T> {
+	/// Mint tokens for `to` account.
+	/// @param to account that will receive minted tokens
+	/// @param amount amount of tokens to mint
+	#[weight(<SelfWeightOf<T>>::create_item())]
+	fn mint(&mut self, caller: caller, to: address, amount: uint256) -> Result<bool> {
+		let caller = T::CrossAccountId::from_eth(caller);
+		let to = T::CrossAccountId::from_eth(to);
+		let amount = amount.try_into().map_err(|_| "amount overflow")?;
+		let budget = self
+			.recorder
+			.weight_calls_budget(<StructureWeight<T>>::find_parent());
+		<Pallet<T>>::create_item(&self, &caller, (to, amount), &budget)
+			.map_err(dispatch_to_evm::<T>)?;
+		Ok(true)
+	}
+}
+
 #[solidity_interface(name = ERC20UniqueExtensions)]
 impl<T: Config> FungibleHandle<T> {
+	/// Burn tokens from account
+	/// @dev Function that burns an `amount` of the tokens of a given account,
+	/// deducting from the sender's allowance for said account.
+	/// @param from The account whose tokens will be burnt.
+	/// @param amount The amount that will be burnt.
 	#[weight(<SelfWeightOf<T>>::burn_from())]
 	fn burn_from(&mut self, caller: caller, from: address, amount: uint256) -> Result<bool> {
 		let caller = T::CrossAccountId::from_eth(caller);
@@ -144,12 +168,36 @@
 			.map_err(dispatch_to_evm::<T>)?;
 		Ok(true)
 	}
+
+	/// Mint tokens for multiple accounts.
+	/// @param amounts array of pairs of account address and amount
+	#[weight(<SelfWeightOf<T>>::create_multiple_items_ex(amounts.len() as u32))]
+	fn mint_bulk(&mut self, caller: caller, amounts: Vec<(address, uint256)>) -> Result<bool> {
+		let caller = T::CrossAccountId::from_eth(caller);
+		let budget = self
+			.recorder
+			.weight_calls_budget(<StructureWeight<T>>::find_parent());
+		let amounts = amounts
+			.into_iter()
+			.map(|(to, amount)| {
+				Ok((
+					T::CrossAccountId::from_eth(to),
+					amount.try_into().map_err(|_| "amount overflow")?,
+				))
+			})
+			.collect::<Result<_>>()?;
+
+		<Pallet<T>>::create_multiple_items(&self, &caller, amounts, &budget)
+			.map_err(dispatch_to_evm::<T>)?;
+		Ok(true)
+	}
 }
 
 #[solidity_interface(
 	name = UniqueFungible,
 	is(
 		ERC20,
+		ERC20Mintable,
 		ERC20UniqueExtensions,
 		Collection(common_mut, CollectionHandle<T>),
 	)

binary blob — no preview

--- a/pallets/fungible/src/stubs/UniqueFungible.sol
+++ b/pallets/fungible/src/stubs/UniqueFungible.sol
@@ -350,19 +350,51 @@
 	}
 }
 
+/// @dev the ERC-165 identifier for this interface is 0x63034ac5
+contract ERC20UniqueExtensions is Dummy, ERC165 {
+	/// Burn tokens from account
+	/// @dev Function that burns an `amount` of the tokens of a given account,
+	/// deducting from the sender's allowance for said account.
+	/// @param from The account whose tokens will be burnt.
+	/// @param amount The amount that will be burnt.
+	/// @dev EVM selector for this function is: 0x79cc6790,
+	///  or in textual repr: burnFrom(address,uint256)
+	function burnFrom(address from, uint256 amount) public returns (bool) {
+		require(false, stub_error);
+		from;
+		amount;
+		dummy = 0;
+		return false;
+	}
+
+	/// Mint tokens for multiple accounts.
+	/// @param amounts array of pairs of account address and amount
+	/// @dev EVM selector for this function is: 0x1acf2d55,
+	///  or in textual repr: mintBulk((address,uint256)[])
+	function mintBulk(Tuple6[] memory amounts) public returns (bool) {
+		require(false, stub_error);
+		amounts;
+		dummy = 0;
+		return false;
+	}
+}
+
 /// @dev anonymous struct
 struct Tuple6 {
 	address field_0;
 	uint256 field_1;
 }
 
-/// @dev the ERC-165 identifier for this interface is 0x79cc6790
-contract ERC20UniqueExtensions is Dummy, ERC165 {
-	/// @dev EVM selector for this function is: 0x79cc6790,
-	///  or in textual repr: burnFrom(address,uint256)
-	function burnFrom(address from, uint256 amount) public returns (bool) {
+/// @dev the ERC-165 identifier for this interface is 0x40c10f19
+contract ERC20Mintable is Dummy, ERC165 {
+	/// Mint tokens for `to` account.
+	/// @param to account that will receive minted tokens
+	/// @param amount amount of tokens to mint
+	/// @dev EVM selector for this function is: 0x40c10f19,
+	///  or in textual repr: mint(address,uint256)
+	function mint(address to, uint256 amount) public returns (bool) {
 		require(false, stub_error);
-		from;
+		to;
 		amount;
 		dummy = 0;
 		return false;
@@ -476,6 +508,7 @@
 	Dummy,
 	ERC165,
 	ERC20,
+	ERC20Mintable,
 	ERC20UniqueExtensions,
 	Collection
 {}

--- a/tests/src/eth/api/UniqueFungible.sol
+++ b/tests/src/eth/api/UniqueFungible.sol
@@ -225,17 +225,38 @@
 	function setOwnerSubstrate(uint256 newOwner) external;
 }
 
+/// @dev the ERC-165 identifier for this interface is 0x63034ac5
+interface ERC20UniqueExtensions is Dummy, ERC165 {
+	/// Burn tokens from account
+	/// @dev Function that burns an `amount` of the tokens of a given account,
+	/// deducting from the sender's allowance for said account.
+	/// @param from The account whose tokens will be burnt.
+	/// @param amount The amount that will be burnt.
+	/// @dev EVM selector for this function is: 0x79cc6790,
+	///  or in textual repr: burnFrom(address,uint256)
+	function burnFrom(address from, uint256 amount) external returns (bool);
+
+	/// Mint tokens for multiple accounts.
+	/// @param amounts array of pairs of account address and amount
+	/// @dev EVM selector for this function is: 0x1acf2d55,
+	///  or in textual repr: mintBulk((address,uint256)[])
+	function mintBulk(Tuple6[] memory amounts) external returns (bool);
+}
+
 /// @dev anonymous struct
 struct Tuple6 {
 	address field_0;
 	uint256 field_1;
 }
 
-/// @dev the ERC-165 identifier for this interface is 0x79cc6790
-interface ERC20UniqueExtensions is Dummy, ERC165 {
-	/// @dev EVM selector for this function is: 0x79cc6790,
-	///  or in textual repr: burnFrom(address,uint256)
-	function burnFrom(address from, uint256 amount) external returns (bool);
+/// @dev the ERC-165 identifier for this interface is 0x40c10f19
+interface ERC20Mintable is Dummy, ERC165 {
+	/// Mint tokens for `to` account.
+	/// @param to account that will receive minted tokens
+	/// @param amount amount of tokens to mint
+	/// @dev EVM selector for this function is: 0x40c10f19,
+	///  or in textual repr: mint(address,uint256)
+	function mint(address to, uint256 amount) external returns (bool);
 }
 
 /// @dev inlined interface
@@ -298,6 +319,7 @@
 	Dummy,
 	ERC165,
 	ERC20,
+	ERC20Mintable,
 	ERC20UniqueExtensions,
 	Collection
 {}

--- a/tests/src/eth/fungible.test.ts
+++ b/tests/src/eth/fungible.test.ts
@@ -14,10 +14,11 @@
 // You should have received a copy of the GNU General Public License
 // along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
 
-import {approveExpectSuccess, createCollectionExpectSuccess, createFungibleItemExpectSuccess, transferExpectSuccess, transferFromExpectSuccess, UNIQUE} from '../util/helpers';
-import {collectionIdToAddress, createEthAccount, createEthAccountWithBalance, GAS_ARGS, itWeb3, normalizeEvents, recordEthFee, recordEvents, subToEth, transferBalanceToEth} from './util/helpers';
+import {approveExpectSuccess, createCollection, createCollectionExpectSuccess, createFungibleItemExpectSuccess, transferExpectSuccess, transferFromExpectSuccess, UNIQUE} from '../util/helpers';
+import {collectionIdToAddress, createEthAccount, createEthAccountWithBalance, evmCollection, GAS_ARGS, itWeb3, normalizeEvents, recordEthFee, recordEvents, subToEth, transferBalanceToEth} from './util/helpers';
 import fungibleAbi from './fungibleAbi.json';
 import {expect} from 'chai';
+import {submitTransactionAsync} from '../substrate/substrate-api';
 
 describe('Fungible: Information getting', () => {
   itWeb3('totalSupply', async ({api, web3, privateKeyWrapper}) => {
@@ -58,6 +59,128 @@
 });
 
 describe('Fungible: Plain calls', () => {
+  itWeb3('Can perform mint()', async ({web3, api, privateKeyWrapper}) => {
+    const alice = privateKeyWrapper('//Alice');
+    const collection = await createCollection(api, alice, {
+      name: 'token name',
+      mode: {type: 'Fungible', decimalPoints: 0},
+    });
+
+    const receiver = createEthAccount(web3);
+
+    const collectionIdAddress = collectionIdToAddress(collection.collectionId);
+    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+    const changeAdminTx = api.tx.unique.addCollectionAdmin(collection.collectionId, {Ethereum: owner});
+    await submitTransactionAsync(alice, changeAdminTx);
+
+    const collectionContract = evmCollection(web3, owner, collectionIdAddress, {type: 'Fungible', decimalPoints: 0});
+    const result = await collectionContract.methods.mint(receiver, 100).send();
+    const events = normalizeEvents(result.events);
+    
+    expect(events).to.be.deep.equal([
+      {
+        address: collectionIdAddress,
+        event: 'Transfer',
+        args: {
+          from: '0x0000000000000000000000000000000000000000',
+          to: receiver,
+          value: '100',
+        },
+      },
+    ]);
+  });
+
+  itWeb3('Can perform mintBulk()', async ({web3, api, privateKeyWrapper}) => {
+    const alice = privateKeyWrapper('//Alice');
+    const collection = await createCollection(api, alice, {
+      name: 'token name',
+      mode: {type: 'Fungible', decimalPoints: 0},
+    });
+
+    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+    const receiver1 = createEthAccount(web3);
+    const receiver2 = createEthAccount(web3);
+    const receiver3 = createEthAccount(web3);
+
+    const collectionIdAddress = collectionIdToAddress(collection.collectionId);
+    const changeAdminTx = api.tx.unique.addCollectionAdmin(collection.collectionId, {Ethereum: owner});
+    await submitTransactionAsync(alice, changeAdminTx);
+
+    const collectionContract = evmCollection(web3, owner, collectionIdAddress, {type: 'Fungible', decimalPoints: 0});
+    const result = await collectionContract.methods.mintBulk([
+      [receiver1, 10],
+      [receiver2, 20],
+      [receiver3, 30],
+    ]).send();
+    const events = normalizeEvents(result.events);
+
+    expect(events).to.be.deep.contain({
+      address:collectionIdAddress,
+      event: 'Transfer',
+      args: {
+        from: '0x0000000000000000000000000000000000000000',
+        to: receiver1,
+        value: '10',
+      },
+    });
+    
+    expect(events).to.be.deep.contain({
+      address:collectionIdAddress,
+      event: 'Transfer',
+      args: {
+        from: '0x0000000000000000000000000000000000000000',
+        to: receiver2,
+        value: '20',
+      },
+    });
+    
+    expect(events).to.be.deep.contain({
+      address:collectionIdAddress,
+      event: 'Transfer',
+      args: {
+        from: '0x0000000000000000000000000000000000000000',
+        to: receiver3,
+        value: '30',
+      },
+    });
+  });
+
+  itWeb3('Can perform burn()', async ({web3, api, privateKeyWrapper}) => {
+    const alice = privateKeyWrapper('//Alice');
+    const collection = await createCollection(api, alice, {
+      name: 'token name',
+      mode: {type: 'Fungible', decimalPoints: 0},
+    });
+
+    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+    const changeAdminTx = api.tx.unique.addCollectionAdmin(collection.collectionId, {Ethereum: owner});
+    await submitTransactionAsync(alice, changeAdminTx);
+    const receiver = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+
+    const collectionIdAddress = collectionIdToAddress(collection.collectionId);
+    const collectionContract = evmCollection(web3, owner, collectionIdAddress, {type: 'Fungible', decimalPoints: 0});
+    await collectionContract.methods.mint(receiver, 100).send();
+
+    const result = await collectionContract.methods.burnFrom(receiver, 49).send({from: receiver});
+    
+    const events = normalizeEvents(result.events);
+
+    expect(events).to.be.deep.equal([
+      {
+        address: collectionIdAddress,
+        event: 'Transfer',
+        args: {
+          from: receiver,
+          to: '0x0000000000000000000000000000000000000000',
+          value: '49',
+        },
+      },
+    ]);
+
+    const balance = await collectionContract.methods.balanceOf(receiver).call();
+    expect(balance).to.equal('51');
+  });
+
   itWeb3('Can perform approve()', async ({web3, api, privateKeyWrapper}) => {
     const collection = await createCollectionExpectSuccess({
       name: 'token name',