erc | Simple Equal Risk Contribution Module | Portfolio library
kandi X-RAY | erc Summary
kandi X-RAY | erc Summary
This is an implementation of the equal weighted risk contributions algorithm (6) outlined in "On the properties of equally-weighted risk contributions portfolios" by Maillard, Roncalli, and Teiletche available here.
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- Calculates weights based on covariance matrix .
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Trending Discussions on erc
QUESTION
I'm creating a smart contract using solidity and publishing it to the Mumbai Test Network.
Right now when I'm interacting with the contract on the client-side using ethers and metamask it's automatically using the MATIC token.
I want the smart contract to be able to receive different kinds of ERC-20 tokens and afterward be able to transfer them.
...ANSWER
Answered 2022-Apr-14 at 15:43The ERC-20 standard doesn't define any way to let the receiving contract know about a transfer that is not initiated by the receiver. It "only" emits an event but that's not readable from onchain.
All ERC-20 balances are stored in the respective token contracts. For example, if an address holds 10 USDC, this information is stored on the USDC contract - no matter if the holder is an end user address or a contract.
Combined these two things together, you can send a transaction to the USDC (or any other ERC-20) token contract, invoking the transfer() function where the receiver is your contract. This will effectively transfer USDC from the user to your contract address.
QUESTION
i want to create a token on ERC-20 network.
i want to inheritance from interface in my contract .
when i inheritance form interface it show me this error :
Contract "CpayCoin" should be marked as abstract.
solc version in truffle :
ANSWER
Answered 2021-Dec-04 at 13:22Solidity currently (v0.8) doesn't have a way to tell that a class (a contract) implements an interface. Instead, the is keyword is used to mark an inheritance, as "derives from".
So the CpayCoin is IERC20 expression marks the CpayCoin as a child and IERC20 as a parent - not as an interface.
The IERC20 (parent) defines few functions (e.g. decimals() and transfer()) that the CpayCoin (child) doesn't implement, which makes the CpayCoin an abstract class.
Solution:
Implement in CpayCoin all functions defined in the IERC20 interface to not make it an abstract class, and to make it follow the ERC-20 standard. Then you're free to remove the inheritance as it becomes redundant.
Or just remove the inheritance to not have any unimplemented function definitions (but then the contract won't follow the ERC-20 standard).
Mind that in your current code, the _transfer() internal function is unreachable. I'd recommend to implement a transfer() external function that invokes this internal _transfer().
QUESTION
I want to reduce deployment cost of my ERC-721A contract.
In general; does flattening smart contract help to reduce it's cost?
Currently I am using ethers.js's contractFactory.deploy method with hardhat.
...ANSWER
Answered 2022-Apr-02 at 08:54The compiled contract has the same bytecode whether you flatten it or not.
So no, unfortunately, flattening will not help any cost reduction.
You can use Remix IDE for inspecting bytecode, assembly and deployment cost of your contracts
QUESTION
This is the first time I am attempting to parse a variable to a CF query, but I have run into a few little issues.
In summary, I am creating a pivot table of sales by operators by week. Manually, no hassle, but I only want a subset of weeks, not all. Again, no real problem if I want hardcoded weeks, but the problem comes in when I try and parse a week number to the SQL query to create the subset of dynamic weeks.
The CFDUMP shows me that the query is executing based on what I am sending to it, but when it comes to outputting the value of the field (the week), it takes the variable name value, and not the field value if that makes sense?
I know that I shouldn't be having field names as values, but I still tryingh to test right now. With the manual query, I prefix the week number with a 'W' e.g. W9, but when I try and do that I get
MANUAL QUERY
...ANSWER
Answered 2022-Mar-09 at 11:42If you're trying to copy the SQL exactly I think you missed the 'W' in the cfset at the top:
Outputs:
Week: W9 (This is the value of the WEEK_2 variable)
QUESTION
I'm trying to use my custom ERC20 contract that is stored in my local storage in the SWAP project that I'm working on.
the error I'm getting while trying to use the erc20 import inside the SWAP contract:
...ANSWER
Answered 2022-Mar-04 at 15:42Change
use erc20::Erc20;
to
use erc20::Erc20Ref;
Put this at the top of the ERC20 contract:
pub use self::erc20::{Erc20, Erc20Ref};
You can see an example of this in the subber contract where it specifies itself as SubberRef and is then called from the main delegator contract
QUESTION
I've been struggling to identify why a nextflow (v20.10.00) process is not using all the items in a channel. I want the process to run for each sample bam file (10 in total) and for each chromosome (3 in total).
Here is the creation of the channels and the process:
...ANSWER
Answered 2022-Mar-05 at 15:20Issues like this almost always involve the use of multiple input channels:
When two or more channels are declared as process inputs, the process stops until there’s a complete input configuration ie. it receives an input value from all the channels declared as input.
Your initial assessment was correct. However, the reason only three processes were run (i.e. one sample for each of the three chromosomes), is because this line (probably) returned a list (i.e. a java LinkedList) containing a single element, and lists behave like queue channels:
QUESTION
I’m fairly new to powershell.
I’m looking to get some idea how I can a built a better AD new hire account script.
This is where I’am hoping to find easier way to manage the user group adding.
We have like 25+ offices. Each office has at least 3-5 different departments.
I have been using two different switch statement for one for updating office address and other information and one to add the group membership. Managing the groups is pain as Each department in office has some common group and 2 or 3 exclusive group.
This is just sample of first few line of switch
...ANSWER
Answered 2022-Feb-22 at 12:02Perhaps easier to maintain is by using a Hashtables.
As for the first part, where you now have a switch to get the correct values for the new user's location, I would create a nested HashTable.
This may look like a lot of text, but it helps in maintaining the values in an orderly way.
Also, by doing this, you can use the inner Hashtables for splatting the parameters to Set-ADUser, as long as you use the correct parameter (key) names as shown in the documentation
QUESTION
1- i will start by writing the general configurations(system, version, smart contract overall idea).
2- then i will show the main problem(with small code line, that i think it need edit).
3- third part i will show what i try until now and the results
4- at the end of i will add the github link for my full code.
note: the full original code produced by mr. PatrickAlphaC.
a- general configurations(system, version, smart contract overall idea):
- a1- operation system: opensuse leap 15.3
- a2- hardhat version: 2.8.3
- a3- node version: v14.18.3
- a4- npm version: 8.3.0
- a5- metamask wallet addone to firefox
- a6- target block chain: polygon(main net, test net)
- a7- smart contract overall idea: use svg to create erc-721 nft, where it's metadata totally stored on chain(the smart contract mint tokenurl to polygon chain).
b- the main problem:
every thing work good as the size of minted file (tokenurl) less than 23.8kb(small than 23.8 kb). where i target mint file that twice this size (every tokenurl equal 50kb). so when try mint tokenurl with size (23.8 Kb < size < 50 Kb) i recive next error message.
...ANSWER
Answered 2022-Feb-17 at 00:14the final results rinkeby network can not accept(mint token url) with size above 23 kb approximately
QUESTION
I can't seem to get GATK to recognise the number of available threads. I am running GATK (4.2.4.1) in a conda environment which is part of a nextflow (v20.10.0) pipeline I'm writing. For whatever reason, I cannot get GATK to see there is more than one thread. I've tried different node types, increasing and decreasing the number of cpus available, providing java arguments such as -XX:ActiveProcessorCount=16, using taskset, but it always just detects 1.
Here is the command from the .command.sh:
ANSWER
Answered 2022-Feb-15 at 17:02In case anyone else has the same problem, it turned out I had to configure the submission as an MPI job.
So on the HPC I use, here is the nextflow process:
QUESTION
I have a ERC-721 smart contract defined like this
...ANSWER
Answered 2022-Jan-29 at 16:08As the IERC721 name suggests, it's an interface.
So the ManagerNFT needs to implement all functions of the interface.
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