Author

Topic: Optimism & Arbitrum (Read 499 times)

legendary
Activity: 1932
Merit: 4602
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May 02, 2024, 03:27:36 AM
#36
https://unchainedcrypto.com/a16z-makes-90-million-private-purchase-of-optimisms-op-token/A16z Makes $90 Million Private Purchase of Optimism’s OP Token
Blockchains including Celo have recently chosen Optimism’s OP Tech Stack to deploy Layer 2s on Ethereum.
"Prominent venture capital firm a16z has snapped up about $90 million of Optimism’s native OP token, according to two sources familiar with the matter, marking the latest institutional bet on the Ethereum Layer 2.

The investment, said to be executed under a two-year vesting period, follows a flurry of activity in the Optimism ecosystem, including growth in usage of Optimism’s OP Stack. Token vesting periods entered into by sizable investors typically come with discounted purchases to the token’s trading price. "
legendary
Activity: 1932
Merit: 4602
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March 01, 2023, 09:49:02 AM
#35
https://twitter.com/optimismFND/status/1630333585524932609
"Quick heads up to developers: a hardfork of Optimism Goerli is planned for March thanks to efforts by @sherlockdefi Watsons.
No downtime is expected, but those running their own nodes will need to update in advance to continue syncing."


https://twitter.com/optimismFND/status/1630333586812579840
"These fixes improve the development experience for Bedrock by fixing inconsistencies in our API for receipts in certain system transactions.
Though the bug is developer-facing and would not have affected user funds, it does require a fork to fix."
legendary
Activity: 1932
Merit: 4602
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February 27, 2023, 05:31:17 AM
#34
https://twitter.com/OptimismSND/status/1629781885436960769
"Today Optimism is announcing OP Airdrop #3.
11.7M OP will be distributed to over 300k unique addresses to reward positive-sum governance participation and power users of Optimism Mainnet."

Optimism ($OP) Token Airdrop Guide: When Airdrop 3?
https://boxmining.com/optimism-op-token-airdrop/
jr. member
Activity: 286
Merit: 1
January 11, 2023, 02:54:39 PM
#33
Optimism and Arbitrum both are a very great project and the great thing is that you easily send the eth through those chain without any fee so many people use this suddenly Optimism and Arbitrum Airdrop are live they show that it will be successful project.
legendary
Activity: 1932
Merit: 4602
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January 11, 2023, 09:03:18 AM
#32
https://twitter.com/0xPolygon/status/1612907002971168777
https://twitter.com/0xPolygon/status/1481012906091327497
"The MATIC BEP2 on BNB Beacon Chain is being discontinued on March 31st.
As a user, If you hold MATIC on Ethereum, Polygon PoS chain or BSC or on Binance, no action is required.

If you hold BEP2 MATIC please move them to Binance and withdraw MATIC on Ethereum, Polygon or BSC.

All BEP2 MATIC will be burned when all users are done swapping.
"
legendary
Activity: 1932
Merit: 4602
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July 22, 2022, 08:38:32 AM
#31
https://decrypt.co/105520/polygon-launches-new-scaling-solution-further-cut-costs-ethereum
Polygon Launches New Scaling Solution to Further Cut Costs on Ethereum
Polygon zkEVM is Polygon’s Ethereum-compatible zero-knowledge scaling solution that aims to outpace Visa's transaction throughput.Polygon Launches New Scaling Solution to Further Cut Costs on Ethereum
legendary
Activity: 1932
Merit: 4602
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May 25, 2022, 02:59:14 PM
#30
https://medium.com/@unclefibonacci/polygon-launches-dex-aggregator-odos-with-multi-currency-exchange-7df48323df4c
Polygon launches DEX aggregator Odos with multi-currency exchange
"On May 17, the DEX aggregator Odos was launched on the Polygon blockchain. It builds optimal exchange routes between pools of 35 decentralized exchanges. Odos also supports multi-currency exchange: in one transaction, a user can exchange up to four different tokens."

__
https://twitter.com/optimismpbc/status/1528830231322165249?s=21&t=1ms6BlR2h298ICjzV_56XQ
"Optimism is for the people, not the sybils.

We’ve been carefully analyzing OP Airdrop #1 for sybil attackers that slipped through the cracks. We’re happy to announce that we’ve removed an additional 17k sybil addresses and recovered over 14 million OP. Bye bye sybils!"
legendary
Activity: 1932
Merit: 4602
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March 11, 2022, 05:55:16 AM
#29
New Airdrop in Optimism ecosystem
https://docs.layer2dao.org/airdrop

"The purpose of the airdrop on Arbitrum is to distribute the Layer2DAO governance tokens ($L2DAO) to early adopters of the top ten Layer 2 projects by TVL, as ranked by
https://l2beat.com/   on January 15, 2022:"

airdrop
https://www.layer2dao.org/#/airdrop
legendary
Activity: 1904
Merit: 1159
March 08, 2022, 12:23:39 PM
#28
Polygon Raises $450,000,000 From Sequoia Capital India, SoftBank, Galaxy, Tiger, Republic Capital
https://blog.polygon.technology/polygon-raises-450000000-from-sequoia-capital-india-softbank-galaxy-tiger-republic-capital

I have no idea how this is not talked about more in the traditional media. 450 Million is a lot of money. And they basically sold their tokens to get that money. It shows a lot of confidence put by these traditional VCs into Polygon.
The whole space is going through a bear market but such major investments show that the underlying current hasn't changed. Just another major positive story can change a lot of things.
newbie
Activity: 28
Merit: 0
March 08, 2022, 11:18:05 AM
#27
legendary
Activity: 1932
Merit: 4602
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February 25, 2022, 05:41:16 AM
#26
https://twitter.com/RaphaelSignal/status/1494818445019385857
"1/ $MATIC hits 3rd week of engagement growth + new developer metrics!

DAU: 346k, +6.36%
Tx/day: 3.5mm, +7.8%
Cost/tx: $0.026, +30%
Rev/day: $92k, +40%

New contracts (total): 15.9k
New contracts (>30tx): 921
First time creators: 2.1k"

https://blog.polygon.technology/zkverse-why-zero-knowledge-rollups-need-a-new-consensus-mechanism/
ZKVerse: Why Zero Knowledge Rollups Need a New Consensus Mechanism
newbie
Activity: 28
Merit: 0
February 17, 2022, 12:15:57 PM
#25
Polygon Raises $450,000,000 From Sequoia Capital India, SoftBank, Galaxy, Tiger, Republic Capital
https://blog.polygon.technology/polygon-raises-450000000-from-sequoia-capital-india-softbank-galaxy-tiger-republic-capital
legendary
Activity: 1932
Merit: 4602
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February 12, 2022, 08:06:55 AM
#24

https://twitter.com/optimismPBC/status/1491821986724519952
"We’re incredibly thankful to saurik for spending so much time analyzing our protocol over the year--enough to find such an important fix! We highly recommend you check out his in-depth breakdown. We'll award the full $2,000,042 promised in our bug bounty."

Disclosure: Fixing a critical bug in Optimism’s Geth fork
https://optimismpbc.medium.com/disclosure-fixing-a-critical-bug-in-optimisms-geth-fork-a836ebdf7c94

Introducing the Perpetual Protocol V2, Set Protocol Integration on Optimism
https://medium.com/set-protocol/introducing-the-perpetual-protocol-v2-set-protocol-integration-on-optimism-ad527051875

https://twitter.com/xdaoapp/status/1489631422340120582
"XDAO was successfully deployed on @optimismPBC Now we are the first DAO builder here "

newbie
Activity: 28
Merit: 0
February 02, 2022, 09:42:09 AM
#23
Interview with Sandeep Nailwal, Co-Founder of Polygon, on scaling to meet the demands of a mainstream world.
https://www.benzinga.com/markets/cryptocurrency/22/01/25157767/exclusive-with-sandeep-nailwal-polygon-aspires-to-be-the-aws-of-web-3
legendary
Activity: 1932
Merit: 4602
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January 29, 2022, 09:59:14 AM
#22
Trying NFTs on Optimism
https://metaversal.banklesshq.com/p/trying-nfts-on-optimism

"A quick guide to using Quixotic, the 1st NFT marketplace on Optimism!
https://quixotic.io/
Currently in beta, this NFT platform lives on Optimism, a young Ethereum layer-two (L2) scaling solution powered by optimistic rollups technology. "
legendary
Activity: 1932
Merit: 4602
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January 12, 2022, 05:50:32 AM
#21
https://twitter.com/sourcex44/status/1480901184328134659
“We will hit the London Block where the EIP1559 and related EIPs will be activated on the Mainnet around 8AM UTC on Jan 18th 2022

eip-1559 will be soon live on Polygon PoS

Let the burn begin”



There was a very important update in Optimism, I missed it.
https://optimismpbc.medium.com/all-gas-no-brakes-8b0f32afd466
"It’s official: the whitelist is gone and anyone can deploy to the Optimism mainnet! As of today, Optimism no longer has a whitelist and anyone can freely deploy contracts."



[moderator's note: consecutive posts merged]
legendary
Activity: 2156
Merit: 1151
Nil Satis Nisi Optimum
January 10, 2022, 04:58:32 AM
#20
https://twitter.com/WuBlockchain/status/1471680886722625536
"The Ethereum L2 Optimism network announced that whitelisting permissions will no longer be required in the future, and anyone can freely deploy to the Optimism mainnet. The TVL of Optimism is $377 million, ranking fifth in the L2 network."

yeah, this with reducing fees with upgraded technology should propel Optimism on TVL list
earlier it was a bit expensive to use Optimism, as fees could reach $20 for swapping, but with $2-3 fees after upgrade, it should have more users, and more protocols will be willing to deploy now, when whitelisting is over

as Vitalik said, multi-chain is bigger than cross-chain, will be interesting development in 2022
legendary
Activity: 2604
Merit: 1504
January 10, 2022, 04:16:11 AM
#19
On January 9, the Arbitrum team reported a failure of the main network of the Arbitrum L2 solution. Everything happened as it turns out due to an error in the Sequencer smart contract, as a result of which the protocol stopped releasing new blocks, the developers guaranteed the safety of user funds, it is worth noting that this is the second network failure in the last half a year
https://twitter.com/arbitrum/status/1480165924355330051
legendary
Activity: 1932
Merit: 4602
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December 24, 2021, 07:56:45 AM
#18
I have use both Optimism and Arbiterium an even provided liquidity in one in anticipation of retroactive airdrop. I am waiting for Zykyns to deploy on their mainet, their gas fees will appear to be better than both Optimism and Arbiterium. This is why the ETH network will still remain in number 2 spot.
https://l2fees.info/
The lowest fees are now in the polygon ecosystem, because matic tokens are cheap.
But Optimism, Arbitrum and Polygon are the biggest ecosystems because there are so many interesting projects there.
But I spent a lot of coins on commissions on various bridges.



Polygon Is Bringing Web3 to Opera Browser
https://blog.polygon.technology/polygon-is-brining-web3-to-opera-browser/
"Polygon is coming to the Opera browser in a partnership that can potentially onboard millions of users into Polygon’s ecosystem of decentralized apps (dApps).

Opera will integrate the Polygon blockchain in their Web3-ready browser and its built-in crypto wallet on Android in the first quarter of 2022. The integration will enable Opera’s users in-browser access to over 3,000 dApps on the Polygon network. "



https://twitter.com/WuBlockchain/status/1471680886722625536
"The Ethereum L2 Optimism network announced that whitelisting permissions will no longer be required in the future, and anyone can freely deploy to the Optimism mainnet. The TVL of Optimism is $377 million, ranking fifth in the L2 network."

[moderator's note: consecutive posts merged]
member
Activity: 858
Merit: 13
Christ The King
December 22, 2021, 12:31:44 PM
#17
I have use both Optimism and Arbiterium an even provided liquidity in one in anticipation of retroactive airdrop. I am waiting for Zykyns to deploy on their mainet, their gas fees will appear to be better than both Optimism and Arbiterium. This is why the ETH network will still remain in number 2 spot.
legendary
Activity: 1932
Merit: 4602
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December 22, 2021, 06:42:56 AM
#16
Polygon Is Bringing EIP-1559 Upgrades to Its Network With a Testnet Release
https://blog.polygon.technology/polygon-is-bringing-eip-1559-upgrades-to-its-network-with-a-testnet-release/
"Polygon is taking steps to bring this much-requested upgrade to our network. It goes live on the Mumbai testnet on Dec. 14, at 8 a.m. UTC.
Polygon’s MATIC has a fixed supply of 10 billion, so any reduction in the number of available tokens will have a deflationary effect. We took Ethereum’s experience since the upgrade as the baseline to simulate the potential impact on MATIC’s total supply. The analysis, which can be seen here, suggests that annualized burn would represent 0.27% of the total MATIC supply."
sr. member
Activity: 1064
Merit: 300
December 12, 2021, 04:28:33 AM
#15
I constantly hear what is better zk rollups than an optimistic. But who is the best of zk rollups? @Dareal_sisyphe has an opinion on this question.

Comparing zkSync and Starkware in a very large twitter thread
https://twitter.com/dareal_sisyphe/status/1469242551836332032

legendary
Activity: 1932
Merit: 4602
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December 02, 2021, 06:23:22 AM
#14
https://www.coindesk.com/business/2021/12/01/21shares-to-list-europes-first-polygon-etp-in-paris-amsterdam/
"21Shares to List Europe’s First Polygon ETP in Paris, Amsterdam
The listing follows the polygon ETP’s unveiling on the SIX Swiss Exchange last month."

https://www.coindesk.com/business/2021/10/20/polygon-becoming-increasingly-independent-from-ethereum-as-app-numbers-rise-report/
"Polygon Becoming More Independent From Ethereum as App Numbers Rise: Report
More than 3,000 apps are on the “layer 2″ platform, up from 30 last year."



Protocol zkSync
https://blog.matter-labs.io/funding-ea89c1fa731e
"zkSync is a ZK rollup, a Layer-2 scaling solution that preserves the security properties of the underlying blockchain by leveraging the latest generation of succinct zero-knowledge proofs."


Wallet for transferring funds to the L2
https://wallet.zksync.io/

exchange
https://trade.zigzag.exchange

Works with ledger. Commission ~ $ 1 per transaction

https://zksync.io/faq/tokens.html#listing-a-token
"Transfers in zkSync support "gasless meta-transactions": users pay transaction fees in the tokens being transferred. Thus, for example, if you want to transfer DAI stable-coin, there is no need for you to own ETH or any other tokens. Just pay your fees in a fraction of DAI.

For tokens without a liquid market price, fees are paid in a different token."





Is the $6B locked in L2 secure?
https://medium.com/l2beat/is-the-6b-locked-in-l2-secure-895cba23d026
"Today L2BEAT lists nineteen Layer 2 solutions live on Ethereum Mainnet. To fully grasp the security of all the $6B locked in those systems one would need to analyse each and every one of them individually."

[moderator's note: consecutive posts merged]
hero member
Activity: 2492
Merit: 542
November 21, 2021, 11:30:59 AM
#13
Heard this l2 solution Arbitrum months ago but never tried it yet. Im still trying to understand how this work on top of eth, Is this l2 already supported by top CEX exchanges like Binance? I know its already live in Uniswap v3, but according to what I search you have to bridge your eth into arbitrum chain to be able to use but Im thinking it can cost you huge transaction fees on this process?   
hero member
Activity: 1358
Merit: 513
November 21, 2021, 11:06:36 AM
#12
Personally I switched to layers 2 and alternative chains long time ago as Ethereum's transaction fees are unbearable. Arbitrum and Optimism are  Layer-2 solutions running on top of the Ethereum blockchain. They combine several transactions and remove some of the load from the main network, which allows you to reduce the transaction fee and increase its speed.
legendary
Activity: 1932
Merit: 4602
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October 11, 2021, 12:01:29 PM
#11
https://quickswap-layer2.medium.com/polygon-just-gave-us-a-1-million-early-birthday-present-63e49843c54d
Polygon Just Gave Us a $1 Million Early Birthday Present!
"QuickSwap will be one year old this month!
To celebrate, and help bootstrap some additional liquidity onto the DEX, Polygon has provided us with $1 million in $MATIC to offer dual farming rewards for select pairs — similar to the campaign they funded that helped Aave grow massively on Polygon.
We will match and exceed all funds provided by Polygon in $QUICK rewards over the coming months
Stay tuned for more information about all of our upcoming birthday celebrations"



https://twitter.com/SymphonyFinance/status/1438529650183995395
1/ Symphony yield generating limit orders are now LIVE on @0xPolygon!

https://block62.medium.com/symphony-finance-airdrop-whitelist-2cff810b606b
Symphony Finance — Airdrop Whitelist
"Symphony finance just launched their mainnet on Polygon and has announced on Twitter that users who create and execute orders on their platform will receive their $SYM token as rewards later."

https://polygon.symphony.finance/

___
https://awesomepolygon.com/



Polygon
How To Bridge Tokens From Ethereum To Polygon With MetaMask
Learn how to bridge your assets to Polygon and interact with a dapp that's focused on reducing carbon emissions
James Beck, Megan Dias(C) November 9, 2021
https://consensys.net/blog/metamask/how-to-bridge-tokens-from-ethereum-to-polygon-with-metamask/



Optimism
https://vitalik.ca/general/2021/11/16/retro1.html

"Conclusions
Generally, I think Round 1 of Optimism retro funding has been a success. Many interesting and valuable projects were funded, there was quite a bit of discussion, and all of this despite it only being the first round.

There are a number of ideas that could be introduced or experimented with in subsequent rounds:"



Polygon
https://blog.polygon.technology/get-ready-to-participate-in-polygons-defi-contest/
Get Ready To Participate In Polygon’s DeFi Contest!

"Updated weekly, the score will initially be comprised of the following metrics:

Two-week engagement: How active has a user been in the last two weeks
10-week retention: How many weeks in the last 10 weeks has the user engaged with Polygon
Net inflows: Has the user deposited or withdrawn more funds into Polygon in the last two weeks. This is a binary metric, and the total amount is not a factor"

[moderator's note: consecutive posts merged]
jr. member
Activity: 840
Merit: 6
October 06, 2021, 11:35:15 PM
#10
The commissions on Ethereum are very large, I advise you to start understanding Level 2 solutions.

Optimism Tutorial | How To Use Optimism On Ethereum
https://jamesbachini.com/optimism-tutorial/

Arbitrum Tutorial | How To Use The Ethereum Layer 2 Solution
https://jamesbachini.com/arbitrum-tutorial/

And another most common technology is:
https://polygon.technology/
Aurora sidechain is a better alternative. It is 100% trustless and compatible with Ethereum. It uses ETH natively to pay for gas and DApps work on Aurora without modification. Aurora uses sharding, which means it can theoretically process infinite TPS. There is no long withdrawal time for Aurora like most L2s. Transactions on Aurora are less than a penny, that's cheaper than L2s.
member
Activity: 112
Merit: 10
October 06, 2021, 07:03:02 PM
#9
https://forum.matic.network/t/increasing-min-gas-price-to-30gwei/2531
Increasing Min Gas Price to 30Gwei
"To reduce the number of spam txns in the network, we are increasing the minimum gas price to 30Gwei from the current (default) value of 1Gwei. It’s recommended to increase the gas price to 30 gwei, but validators are free to chose their own min gas price."
The problem is always a high "gwei", this is the reason for the emergence of new ones besides being economical, plus the network is fast, and easy, once they have this trust it will repeat itself, by increasing the gwei slowly.
legendary
Activity: 2618
Merit: 2304
October 06, 2021, 06:53:16 PM
#8
As far as I understand, the Arbitrum network does not have a native coin, so it looks like an L2 scaling technology for Ethereum. Its main advantage is that the Uniswap decentralized exchange supports this solution, so traders can use different farming and harvesting protocols and pay low transaction fees. On the other hand, the downside is that people cannot invest in Arbitrum as a promising cryptocurrency.

Polygon seems to me the better solution for scaling and acting as a bridge, although I admit that in general, PoS networks are too centralized. In fact, Polygon has a native coin, so I want to buy some MATIC as a middle-term investment.



Increasing Min Gas Price to 30Gwei

Even now, asset transfers on the Polygon network are very cheap.
legendary
Activity: 1932
Merit: 4602
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October 06, 2021, 10:46:06 AM
#7
https://forum.matic.network/t/increasing-min-gas-price-to-30gwei/2531
Increasing Min Gas Price to 30Gwei
"To reduce the number of spam txns in the network, we are increasing the minimum gas price to 30Gwei from the current (default) value of 1Gwei. It’s recommended to increase the gas price to 30 gwei, but validators are free to chose their own min gas price."
full member
Activity: 1204
Merit: 100
September 25, 2021, 06:59:33 PM
#6
The cost of TVL in the Ethereum solution L2 Arbitrum increased by more than 3263% over the week and reached a record $2.2 billion.
another reason why to go with Arbitrum is the possibility of an airdrop to their users, we've seen airdrops like that this last few years, it is a good interface and even though i think that optimism is a bit better, I am using Arbitru and it is because of the possible airdrop and the small differences between the two of them.
legendary
Activity: 1932
Merit: 4602
Buy on Amazon with Crypto
September 25, 2021, 01:21:57 PM
#5
The commissions on Ethereum are very large, I advise you to start understanding Level 2 solutions.

Optimism Tutorial | How To Use Optimism On Ethereum
https://jamesbachini.com/optimism-tutorial/

Arbitrum Tutorial | How To Use The Ethereum Layer 2 Solution
https://jamesbachini.com/arbitrum-tutorial/

And another most common technology is:
https://polygon.technology/
how sure if there is a turmoil it will not be the same as the ETH gwee incident, the network path causes the price to be high, in the past when they used ERC 2.0 they also did the same thing but it couldn't be dammed by the market pressure. alternatives are temporary but BSC, Polytron and ECO have so far started to balance those prices. I hope they can keep it up in the future.

It is now impossible to work in the 1st level of Ethereum. Commissions can grow at any time.

__
https://twitter.com/sourcex44/status/1437681858511183873?s=19

Bridges to & from BSC<>Polygon

https://anyswap.exchange/bridge#/router
https://evodefi.com/bridge
https://bridge.orbitchain.io/
https://izumi.finance/bridge
https://o3swap.com/swap

__
https://wallet.matic.network/bridge/
https://xpollinate.io/
https://hop.exchange/
https://bridge.evodefi.com/?token=USDC
https://bridge.orbitchain.io/
https://zapper.fi/ru
https://iotube.org/
http://swap.transit.finance/

https://bitcointalksearch.org/topic/m.57730372
member
Activity: 112
Merit: 10
September 20, 2021, 08:16:12 AM
#4
The commissions on Ethereum are very large, I advise you to start understanding Level 2 solutions.

Optimism Tutorial | How To Use Optimism On Ethereum
https://jamesbachini.com/optimism-tutorial/

Arbitrum Tutorial | How To Use The Ethereum Layer 2 Solution
https://jamesbachini.com/arbitrum-tutorial/

And another most common technology is:
https://polygon.technology/
how sure if there is a turmoil it will not be the same as the ETH gwee incident, the network path causes the price to be high, in the past when they used ERC 2.0 they also did the same thing but it couldn't be dammed by the market pressure. alternatives are temporary but BSC, Polytron and ECO have so far started to balance those prices. I hope they can keep it up in the future.
legendary
Activity: 1932
Merit: 4602
Buy on Amazon with Crypto
September 19, 2021, 04:38:02 AM
#3
"You can mint an NFT for free on @0xPolygon
 PoS, and sell it on ETH mainnet?"
https://twitter.com/0xPolygon/status/1438819340841750532


https://mintnft.today/

https://medium.com/@piyushm_83760/polygon-bridge-for-matic-eth-nft-f75c6e0d6020
Polygon NFT Bridge to transfer token from Matic <->Eth.
"Nft Bridge(bridge.mintnft.today) is a trustless two-way channel between Polygon and Ethereum, one can transfer tokens across Polygon without having any third party dependency and liquidity limitation."
https://bridge.mintnft.today/




https://cbridge.celer.network/#/transfer


https://dex.guru/
ETH(matic), BSC and AVALAHCHE

https://app.hop.exchange/


[moderator's note: consecutive posts merged]
legendary
Activity: 2604
Merit: 1504
September 13, 2021, 02:19:58 PM
#2
The cost of TVL in the Ethereum solution L2 Arbitrum increased by more than 3263% over the week and reached a record $2.2 billion.



The price of NYAN on September 12 rose to $7.8 now it is trading around $1.4





On September 15, a 45-minute failure occurred in the work of the Ethereum solution of the second level of Arbitrum due to an error in the Sequencer contract. During this time, the network did not process transactions. The developers reassured users that their funds are safe. https://medium.com/offchainlabs/arbitrum-one-outage-report-d365b24d49c





[moderator's note: consecutive posts merged]
legendary
Activity: 1932
Merit: 4602
Buy on Amazon with Crypto
September 02, 2021, 09:17:48 AM
#1
The commissions on Ethereum are very large, I advise you to start understanding Level 2 solutions.

Optimism Tutorial | How To Use Optimism On Ethereum
https://jamesbachini.com/optimism-tutorial/

https://gateway.optimism.io/
https://twitter.com/optimismPBC
https://www.optimism.io/blog


Arbitrum Tutorial | How To Use The Ethereum Layer 2 Solution
https://jamesbachini.com/arbitrum-tutorial/

https://arbitrum.io/
https://twitter.com/arbitrum

And another most common technology is:
https://polygon.technology/
https://twitter.com/0xPolygon
https://blog.polygon.technology/
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