Create a NFT Presale smart contract

Today you will learn how to code an NFT smart contract that will have a presale function built into it. Hope you guys have fun creating this with me :)
Twitter: / hashlipsnft
Website: hashlips.io/
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[@bearish_bull]

Hash, yet again; thank you man. You’re literally doing everything you can to provide value for us! Thank you 101 times over. Much love from San Antonio Texas.

[@HashLipsAcademy]

Only a pleasure man. Will try to do my best every video

[@espermeadows1882]

Hi Bearish, I’m looking for someone that knows how to do all this nft coding stuff to help launch my nft art project in the u.s, let me know if you are interested to help me out and we can add a multi owner contract for incentives. Let me know!

[@courageisaac9996]

Best token of the year! #lzn #Luzionprotocol 🚀 Massive 383,125.80% APY. 💯 Fully Doxed Team and KYC. 🔥 2% Auto Black Hole (Actual dEAd address) 🟢 4%-5.3% BUSD. 🔒 Audited, Safe and Secure (ZERO Team Token).

[@rafikhafideddine6124]

@@espermeadows1882 hey mate i can help

[@dollahdollahbill]

BRO YOU READ MY MIND. HashLips, you are doing so much for this community 😭

[@HashLipsAcademy]

🙏🙌 Thanks man

[@BioShocq]

dude I can't tell you how thankful I am for your videos and this one especially! please keep making how-tool's for smart contracts and the steps please 😊

[@GMTVlol]

Hashlips! You are bringing an insane amount of value to this space! Your tutorials have saved us so much time.

[@HashLipsAcademy]

Only a pleasure 🙏🙌

[@sharminoanali6647]

Hey, have you tried out this code. How is it working for you?

[@choke1851]

Not all heroes wear capes. THANK YOU!

[@neiixx]

i love u, can you follow this with a part 2 on web3, adding the mint button again and also how to customize your webpage more?

[@itsliaa4223]

THIS EXACTLY

[@benstsofia1516]

If you have already find tell me I’m looking this

[@tursen-business3650]

@@itsliaa4223 did u found something? I'm looking for the same

[@tursen-business3650]

@@benstsofia1516 U found?

[@benstsofia1516]

@@tursen-business3650 yes actually in French you want ?

[@choke1851]

Your so good at explaining how to make contracts, you need to make a part 2.

[@HashLipsAcademy]

Yes busy with more content 😁

[@digital_comrade]

That's pretty dope but considering the current gas fees whitelisting all the addresses manually as an array sounds pretty expensive. It would be cool to have a version that uses signing instead.

[@pauloctaviancuta3512]

Best video ever dude. Keep up the good work. You're growing the community a lot!

[@iliya4634]

Hello hashlips thank you for your amazing work !!😊

[@Shannonchats_my__Teleqram__id]

Helpline 📲📩 QUESTIONS CAN COME IN ⬆️⬆️ 🆙☝️

[@brian_ball]

Can you do a video on all the things that cost gas? Does it cost gas to add whitelisted array? Change state of contract? etc. etc.

[@HashLipsAcademy]

Yes surly I can.

[@MXNCLER]

Finally got this to work with dapp minting engine 🔥🔥🔥

[@nikkomasagca7365]

You are so freaking awesome dude! The best blockchain developer in the world!! 💪

[@geniuskatie6813]

Thank you so much, I am so nervous about my first project 😅

[@punkpie2000]

HL thank you than you than you. Almost done with the art for a project and was looking into this very thing. I really appreciate you taking the time and providing this info, it means allot man.

[@jwallwhitworth2011]

Could ypu show how to incorporate this into your dapp for the website?

[@Relrancid]

This please. It would literally be everything I need

[@gorillagirl9922]

awesome!!! thanks so much! My favorite teacher on here!

[@The-Sentinel]

dude youre killing it with these videos.

[@coopstar1976]

Brilliant, I’ve been looking how to do this for ages. Thanks

[@darwinalways620]

Thank you 🙏🏼 Daniel!

[@HashLipsAcademy]

Glad you enjoyed the video 😁

[@praveenkumarhallad6554]

its really nice buddy i love it ! at last i have a question as you disabled whitelisted user and any one can mint. i just wanted to know how to limit the number of nft mint for any users ? it would be great if you tell us that part.

[@skniblk]

This is the greatest video i've ever seen lmao thank you so much!

[@nj99]

You've done it again! Crazy helpful.

[@AndrewDewittBaker]

Hey Hash! Just to let you know I think this contract is bugged. There is no mapping for minted balance, so if we set the max mint amount to 3, and the nftPerAddressLimit to 3, what can happen is a whitelisted person can mint 2 NFTs, and then go to mint again, and the contract will let them which is fine because they are under the max, but it will let them mint the max again, so they are able to mint 3 when they should only be able to mint 1 because they already minted 2, so they are able to exploit the contract and get 5 NFTs when they should only be able to get 3. I checked your other NFT presale contract and it seems like this one is missing the mapping for addressMintedBalance and ownerMintedCount. I don't know if "bugged" is the right word, the contract is doing what it's supposed to, it's just missing that crucial element. Maybe I did something wrong, but I tried multiple times to get it to work without that bug and could not do it. Just thought I would let you know, maybe this could be a good opportunity to teach about this kind of stuff and the importance of testing! And as always thank you for what you do, you are the best!! See you in Discord. :)

[@fabioseva1]

Daniel! You nailed it again! Thank you so much!!

[@manouchehryazdiha1412]

Excellent as always! Thanks Daniel!

[@Shannonchats_my__Teleqram__id]

Helpline 📲📩 QUESTIONS CAN COME IN ⬆️⬆️ 🆙☝️

[@angelsanddemons7475]

Love the videos. Any chance of getting a tutorial on how to airdrop more nfts to holders of your nft collections?

[@HashLipsAcademy]

Yes I'll add it to the list

[@angelsanddemons7475]

@@HashLipsAcademy awesome ! Love you!

[@Клоунеско]

Super Info!

[@timoquast4822]

Thanks mate! How about a video about how to integrate the Pre-Sale & the code onto a Website?

[@gopimohan26]

Yes, very much looking forward to this..

[@freestockfootage4kUHD]

Can you do a video on how to do this on solana please?

[@milfa7]

Excellent explanations. Thank you.

[@ognjenpingvin]

One of the few videos that actually helped! Does this contract mint a random NFT from a collection every time?

[@nicoluminous]

my brain is broken :/ I'm gunna keep at it tho until I learn. I want to drop a collection from my own site where people can mint. Thanks for making these videos!

[@jamesmagee6138]

very helpful. amazing tutorial thank you so much!

[@arek1605]

Thank you ! Savage tutorial as always !!

[@ken14250]

Hi HashLips, nothing but thank you for your awesome and wholehearted tutorials, just wanna ask for another favor, could you also introduce us some examples or tutorials on how to write DeFi smart contracts on Solidity as well?

[@d33g]

what an absolute legend. What can I buy to support you

[@parthpandey1920]

Hello hashlips thank you for your work , it is really helping me to learn. I have a question for the 10,000 nft tutorial you posted earlier this month. i want the nfts that get listed to have their prices assigned to them via contract and be visible on opensea instead of individually listing them for sale. Is there a simple way to do it ?

[@sharminoanali6647]

Hey parth, I have a question. Since you have used the intrusions from the 10000 nfts turtorial. Did you buy a subscription of Piñata? Also, do you have programming knowledge yourself. I’m really struggling with that tutorial .

[@sharminoanali6647]

Instructions *

[@darkdeath70]

23:48 since balanceOf is being used to enforce the limit couldn't the user just transfer out his tokens and mint more?

[@jackliu586]

Hello Hash, love your videos. I just have a question regarding presale, most of the nft presales normally give their community a sneak peek of their art, my questions is how can you prevent someone from stealing your art before the actual sale? Or is it that the nfts are already minted before the sneak peek?

[@MoritzFischer]

I believe both the pre-sale and public sale contract will use the "not revealed" image. So even you mint early, you still see that reveal image. Once EVERYONE minted, you can change your IPFS records and everyone will get their NFTs.

[@espermeadows1882]

@@MoritzFischer Hi Morris, I’m looking for someone that knows how to do all this nft coding stuff to help launch my nft art project in the u.s, let me know if you are interested to help me out and we can add a multi owner contract for incentives. Or if you know anyone that would be interested Let me know!

[@TidalTales499]

@@espermeadows1882 hey , are u still onto any nft projects , if yes , then im really interested to work for any nft project

[@Younes07770]

You read my mind bro! Thank you so much. When you get the time, could you touch upon how provenance is done like with bored apes provenance page?

[@DPortal17]

Fantastic bro. Thank you.

[@arunavoray]

@HashLips NFT can you show how to do the Merkle tree version

[@shenanvindinu5120]

Thank You man! you are the best

[@zazyjoker8664]

Great video.. can you do one video explaining Candy Machine for Solana Mint ?? Please and Thank you!

[@Silvertestrun]

Ty

[@HangryAnimalsGame]

What are peoples opinions on the mapping method as opposed to the array method in relation to whitelist addresses? Gas intensive? which is best on mainnet ? getting people mentioning that a large whitelist in an array may actually fail on ethereum. Any experience with this to share?

[@adamsjamiu640]

@HashLips NFT Thank you for this course. It was really helpful. Still i have one question. How do i set different price for Whitelist and non whitelist user. Let's say i want whitelist price to be difference from Public price. And also I lets say my total supply is 1000 and i want to assign 200 slots for all whitelisted address?

[@TidalTales499]

if( to != owner()){ if(ONLYWHITELISTED == true) { require(isuserwhitelisted(to) ,"only whitelisted ddresses are allowed to mint"); require(msg.value == whitelistprice * MINT_AMOUNT, "please enter correct amount"); } else { require(msg.value == MINT_PRICE* MINT_AMOUNT,"insufficient funds"); } }

[@markoorlovic4990]

can you add this to the lower gas erc721 solidity contract? can you show us how? love your videos! you're truly doing gods work. thank you

[@joshua11111]

Hi man, quick question, how much gas does it cost to add people to whitelist when the contract is deployed on mainnet? Is there a way to whitelist people on a testnet smart contract first and then migrate the smart contract to mainnet with all the whitelists already added?

[@anthcmt]

Hello HashLips, thanks for the awesome video once again. I would also like to know if there is any way we can define a maximum presale supply in the contract? Thanks in advance.

[@HashLipsAcademy]

Yes well you set the number of addresses * the max they each can mint.

[@97empregos37]

deploying this pre sale, how is it used in Open Sea or in some marketplace? would I make an IPFS address to interact with marketplaces?

[@JLCrazyLevels]

Nice man, you’re the best

[@azriellee]

Thank you Daniel!!!

[@orange-pilled]

Thanks hero, really appreciate the effort! I have a quick question tho: Is possible to assign a different price to whitelisted users?

[@Salan1]

Thanks for a great video! I've got a technical but simple question. So I'm a traditional software developer doing Solidity/Blockchain coding for the first time. My question regards the data type of the whitelisted addresses. Does it make sense to use a HashMap (seems to be called Mapping in Solidity) rather than using an array? Maybe the computing speed will only make a difference if we were to fill the array with 100K addresses or so. But I'm just interested in if it works and if it would be a viable alternative. What do you guys think?

[@espermeadows1882]

Hi Salan, I’m looking for someone that knows how to do all this nft coding stuff to help launch my nft art project in the u.s, let me know if you are interested to help me out and we can add a multi owner contract for incentives. Let me know!

[@patrickhumphrey7818]

Great Video once Again Hashlips. By any chance could we get a tutorial on how included payment to charities in smartcontracts

[@moisespineda7886]

Hashlips 👄 why are you so amazing 🤩 😂 🙌 #hashlipsforpresident #js

[@HashLipsAcademy]

🙏🙏🙏

[@drdev_blog]

curious to know if there is anyway to inegrate function which allows holders of 1 token - mint their NFTs? As companion function? Does anybody know solution?

[@lucascaviezel8899]

Awesome content! Thank you!!! Have a question: how do I create a program for all the holders of my NFT to be whitelisted automatically? Thanks

[@gorkemkose1813]

Why don't we use the isWhiteListed as a mapping from address to bool, and directly access that mapping from the mint function instead of defining another function isWhiteListed that iterates over the array of whitelisted addresses? What is the purpose of doing that? Thanks!

[@danielpreikschat3595]

Thank you, this works.

[@bolafrensID]

So if we want do Presale, we just need presale this contract from description? Not the contract from your Ultimate Tutorial? Thank you for sharing Hashlips.

[@cryptomundi534]

always really helpful

[@animeswitch]

such a legend omg

[@alebuda117]

OMG men you are amazing!!

[@krishnadasbosch3333]

Awesome! Thanks so much!!!!

[@NapiyosunYaa]

is it possible to send incoming payment to multiple wallets? %50 %50 ?

[@olusojisosanya4884]

Nice one. Thanks

[@reyzayas9379]

Hey great vid, had a question about the NFT per Address Limit. Basically a scenario that I do not want to arise is if a user mints 3 then transfers those nfts to another wallet and keeps minting infinity this way. Does checking the balance of the msg.sender cover this situation or would I need to write different logic. (Just a scenario that came up in a recent NFT mint that I 100% want to avoid) Thank you so much!

[@awoyemivictora]

sir, I can't find the nft presale code on your github solidity again. is there a way to get the code file? please

[@felipem.9130]

Thank you for all the valuable content Hash! Do you know if there's an equivalent to remix for the solana blockchain?

[@Rlifshitz19]

Is there a video where you set this all up?

[@KolsonO]

hi hashlips thank you for the great tutorial! I only wanted to ask could you do a tutorial on how to make mint price for white listed users different than non white listed users, for ex. Presale mint price 50$, Public mint price 100$

[@lileggy9553]

hi, i am struggling with this one question, although it works, it still allows the user to proceed with the transaction, making them lose gas, is there a way to do this so that they cannot proceed with the transaction

[@R3L4X3DD3VIL]

Hello hashlips love your vids. Quick question though, can't someone mint 3 then transfer the tokens to a different address then keep minting? As we are not deleting them from the whitedAddresses array?

[@juvillelim1771]

@Hashlips NFT - can i check if adding the arrays of whitelist addresses, does it cost gas to do so? Will adding 100 whitelist addresses cost more gas than adding 10 whitelist addresses?

[@MoritzFischer]

Such a great video. Thank you so much! Quick question: So this contract can be used for pre-sale and public sale. Correct? (I just have to turn off the boolean). Thank you

[@tiny-aesthetics1347]

Did you get an answer? I have the same question

[@TidalTales499]

you are correct

[@krishenparhar7832]

Hey Hash, how can you put this all on a website for people to mint?

[@charming4334]

When I paste the code it doesn't import the other files :(

[@furkanturkal8414]

How much gas does it cost to add ~500 or ~1000 items to the whitelist as a _bulk data_ to array when the contract is deployed on Eth mainnet?

[@Bobby-lh2sx]

13:24 is there any reason to write if(onlyWhiteListed == true), just if(onlyWhiteListed) would suffice right?

[@Domanica]

This is a great video man! I'm just wondering if the code is the same for a solana nft

[@joshhill8189]

If a user mints 3 NFTs and is now at the max amount of mints, would this user be able to transfer the NFTs to a different account, setting the balance to 0, then continue minting another 3, then repeat? Is there a way to store the data of an address mints to stop this from happening or will this already work from this code?

[@brucerebello]

Daniel, is it possible to use this contract instead of the one you have on the NFT collection - Ultimate guide for minting? I say this because I have another team member who I would also like to give NFTs to before the actual public mint? Thanks in advance!

[@DiamondViews]

Nftperaddresslimit does not seem to work

[@mehdikrimi8941]

Is there is a limit how much maximum to add in list array of whitlisted ?

[@jacksonmetzler4297]

Hey guys does anyone know how to get the "created by ... " pop up above the description metadata we imported. It does not populate for some reason. Thanks

[@harlyquinne]

pls make a video on how to verify using standard JSON input

[@baewuf]

How do you make the error message display on the website without the user eating the transaction fee?

[@bullmoon_libra]

Let's say user A is only allowed to mint 2 nft and user B 4 NFT, how do I add this to the code?

[@TheDsb95]

Is it possible to do white list off chain? What are the pros and cons of doing it off chain vs on chain?

[@ksproductions8032]

When I use the ABI from this contract and put it in my dapp, I press the mint button on the dapp and get the error "Error: Invalid number of parameters for "mint". Got 2 expected 1!" Any solution? Thanks! I'm using your Presale contract from your github.

[@aflexe]

Hey! When trying to verify the contract on polygonscan I get the "Error! Unable to generate Contract ByteCode and ABI" error. I see that a lot of people in the Discord serverhave the same problem. Any idea on how to fix it?

[@ruwankarandana2725]

Isn’t is better and cheap to use a mapping than an array to hold addresses?

[@HashLipsAcademy]

It depends what you usecase is for using an array or mapping. I think a mapping is cheaper but will have to check

[@pedroacosta6850]

Great video

[@kingkckc]

the way this contract works for resolving whitelist users that have already minted using the balanceof function, if that whitelist users does a transfer of one of their minted tokens to another wallet will the contact allow them to continue minting since their balance would have decreased?

[@HashLipsAcademy]

Yes that loophole was fixed in the next video

[@mohmmadanas5324]

This is amazing 🤩 I want ask how we can make another price for whiteliste users ?

[@diogovski2565]

Can you do a video explaining how to add the urls for the jpegs and json files using that contract?

[@Fabccool43]

hi hi thank you for your video, I need the subtitle for my translation, thank you for activating the subtitles

[@HashLipsAcademy]

Pleasure I think KZbin does it automatically 😁🙌

[@J_Nielsen]

Will this work for my NFTs being launched on the polygon chain in OpenSea as well??