What Is SASEUL (SL) Coin? Basic Facts to Know Before You Mine It
SASEUL is a blockchain (a record book that many computers each keep an identical copy of) made by ArtiFriends, a Korean company. The coin's short name is SL, and in Korean it's also called 사슬코인 (saseul coin). You can mine it with an NVIDIA graphics card.
Web posts and AI answers often mix in old numbers. With numbers, what matters is the date they were true. So every number below comes with the date it was checked.
At a glance
| Question | Answer |
|---|---|
| Name | SASEUL. The coin's short name is SL. In Korean it's also called 사슬코인 (saseul coin). It's a different coin from Chainlink (LINK) |
| Who made it | ArtiFriends Inc., a Korean company. Guardee, the official app for receiving and sending the coin, is also made by ArtiFriends |
| Official start date | May 16, 2022 (world standard time, UTC). In Korea time it was May 17 |
| How to mine it | With an NVIDIA graphics card. You join a group that mines together and splits the coins. The steps are in the mining guide |
| How many will ever exist | 5.5 billion SL. According to the project description, none were sold in advance to raise money. They come out only through mining |
| Time until a transaction is final | It differs by source. The official docs say 6 to 8 seconds. The CoinMarketCap project description says processed in about 4 seconds and set after about 600 seconds |
| Where it's bought and sold | As of September 27, 2026, the only listing confirmed by an official notice was BitMart, an overseas exchange. BitMart stopped all trading on August 26, 2026. There's been no official announcement of another listing since. People seem to trade it among themselves (OTC) on places like Naver Cafe boards (Naver is a Korean web portal) (not places the official team points to) |
| Where to see the records | explorer.saseul.com. At 9:23 on September 27, 2026 (Korea time), it showed 46 / 74 computers holding copies of the record book |
| Names people mix up | Xphere (coin XP) and ZIGAP were made by Seoul Labs. They are not SASEUL |
Basics
What is SASEUL?
SASEUL (coin SL) is a blockchain made by ArtiFriends Inc., a Korean company. It runs on its own, without leaning on another blockchain.
Its English name is SASEUL. The coin's short name is SL, and in Korean it's also called 사슬코인 (saseul coin).
Is 사슬코인 (saseul coin) the same as Chainlink?
No. They're different coins. SASEUL's coin is SL. Chainlink's is LINK.
"사슬" (saseul) is the Korean word for "chain." So it's easy to mix it up with Chainlink by the name alone.
People call it 사슬, 사슬코인, SASEUL or SL. They all mean the same coin.
Are Xphere, Seoul Labs and ZIGAP part of SASEUL?
No. SASEUL (coin SL) and the official app Guardee were made by ArtiFriends.
Xphere (coin XP) is a different blockchain launched by Seoul Labs. ZIGAP is an app made by Seoul Labs. It lets you receive and send many kinds of coins in one place.
Seoul Labs is a company that signed a business agreement with ArtiFriends in 2023. I couldn't confirm whether they're still working together. They're not the same company.
When did the mainnet launch?
The mainnet (the network once practice is over and it runs for real) has been running since May 16, 2022. That's in world standard time (UTC).
In Korea time it was May 17. That's why Korean articles say the 17th. Both mean the same day. On September 27, 2026, the official block explorer's statistics screen also showed the first record time as 4:49 on May 17, 2022, Korea time.
Searching shows a film with the same name. Is it related?
The 2017 film "Saseul" has nothing to do with this blockchain. Only the name is the same.
Mining
How do you mine SASEUL?
With an NVIDIA graphics card. One graphics card in a home computer is enough. Rather than mining alone, you join a group that mines together and splits the coins.
How to pick a group, which version of NVIDIA's program fits your card, the setup order and fixes when you get stuck are all in the mining guide.
How do mining rewards become SL?
If you mine by running your own computer that holds a copy of the record book, the reward first piles up as "resource" (mining reward points). Piled-up resource is turned into SL with a command called refine. That's what the command guide in the official docs (updated March 9, 2026) says.
People mining in a group (pool) get paid in SL by the group.
At 9:23 on September 27, 2026, the rate on the official block explorer was 42.763%. Refine 100 resource and you get about 42.8 SL.
Explorer screen values and the Refine contract in detail
On September 27, 2026, the official block explorer's statistics screen showed these values.
| Label on screen | Value (9:23, September 27, 2026) | What it means |
|---|---|---|
| Refine Multiplier | 42.763% | The rate used when turning resource into SL. Refine 100 resource and you get about 42.8 SL |
| Total Supply | 3,474,603,007 SL | The total supply shown on the screen |
| Next Reduction | January 12, 2027 | The date the explorer works out and shows as its estimate for the next cut in new coins |
The SL you receive is "resource refined × multiplier (rate)." The explorer's Refine Multiplier is this rate. The 2023 sample Refine contract in the official docs (version 2) subtracts a fee from that. The Refine contract on the chain now (version 4) has no fee subtraction (checked on an official node on September 27, 2026).
42.763% equals 27/32 (0.84375) multiplied five times (about 0.4276). By that math, the rate has been cut five times so far.
How it works and how many coins exist
What is its consensus method?
This means the rule that decides who gets to write in the record book. SASEUL's record book is split into two branches, and it uses its own mining-based rule (HAP-2). That's what the official docs and the project description say.
One branch is the mining book, where anyone can mine through proof of work (whoever does lots of calculating and finds the answer first gets the coins). The other branch is the main record book, where transactions are written.
A computer that succeeds at mining serves as a validator (the role that checks and signs transactions) for a set period. So validators aren't fixed. They take turns and keep changing.
Consensus in more detail (names as used in the official docs and project description)
- The side record book where mining happens: the resource chain. It uses proof of work (PoW) and handles picking validators and mining
- The main record book: the main chain. It records transactions and changes of state
- Consensus rule: HAP-2. The official docs say a node that succeeds at mining serves as a validator for a set period, and several validators make blocks together (docs.saseul.com overview, updated March 9, 2026)
- Signing rule: the project description says a block (one page of the record book) is valid once 6 or more of the 9 validator seats sign it
- At 9:23 on September 27, 2026 (Korea time), the Validators box on the official block explorer's statistics screen had 9 seats. Some addresses sat in two seats, so there were 7 different addresses. Validators take turns, so it may differ each time you look
- The project description is the text the project posted itself on CoinMarketCap (a coin information site)
How long until a transaction is final?
It differs by source. Final means the record has set so that no one can undo it.
| Source | What it says |
|---|---|
| Official docs (docs.saseul.com overview, updated March 9, 2026) | The current network finalizes in 6 to 8 seconds |
| CoinMarketCap project description (checked September 23, 2026) | A transaction is processed in about 4 seconds. After that, once 10 more pages are added to the mining book (about 600 seconds, roughly 10 minutes), it sets |
Why the two differ is unknown. Quoting "4 seconds" or "6 to 8 seconds" on its own is easy to misread. Look at what each number measures, together with its source.
The difference between before and after a record becomes final is shown with a picture in the 1000x post.
Is it 1,000 times faster than Bitcoin?
No basis for the 1,000 figure could be found (as of September 27, 2026). Compare the project description's processed in about 4 seconds and set after about 600 seconds with Bitcoin (about 10 minutes per page of the record book on average, and about 1 hour until six more pages are added and it sets), and it's about 6 to 150 times, depending on what you measure. Going by the official docs' 6 to 8 seconds to final, it comes out different again.
What is the maximum supply?
At most 5.5 billion SL will ever come out. At 9:23 on September 27, 2026, the total supply (Total Supply) on the official block explorer's statistics screen was 3,474,603,007 SL. This number keeps growing through the day.
The coin information site CoinMarketCap lists the amount out right now as 3.4 billion SL. But it's marked as a number the project reported itself (checked September 23, 2026).
Does the number of new coins go down?
Yes. The project description says the amount of new coins shrinks to 27/32 each year. At that pace, it halves roughly every four years.
If it were cut once a year, there'd have been four cuts since the mainnet started (May 2022), but today's rate of 42.763% is the value after five cuts. The rate drops not on a date but each time refined resource fills up 1 billion (the Refine contract example, version 4, on the official GitHub). If today's rule had applied since 2022, supply would be higher than it is now (about 3,477.76 million SL as of main block 4,420,040 on the official node, September 30, 2026), so my guess is the earlier rule was different, but I couldn't confirm from public sources when the drops happened.
The FAQ on the official site says it shrinks by about 15.9% each year. Shrinking to 27/32 means a 15.625% cut each time. Why the two numbers differ is unknown.
The cut doesn't happen in May, when the mainnet started. On September 27, 2026, the official block explorer showed the next cut (Next Reduction) as January 12, 2027. That isn't a date fixed on the calendar. It's an estimate the explorer works out from the amount left.
How much does shrinking to 27/32 cut?
If 100 comes out now, about 84 would come out after one cut (100 × 27 ÷ 32 = 84.4).
After four cuts, 100 becomes about 51 (27/32 multiplied four times is about 0.51). That's why people say it halves roughly every four years.
15.9% is the yearly cut that makes something exactly halve in 4 years. My guess is that's where the FAQ number comes from.
Is SL listed on an exchange?
As of September 27, 2026, the only listing confirmed by an official notice was BitMart, and BitMart stopped all trading on August 26, 2026. There's been no official announcement of another listing since.
The BitMart listing was on May 9, 2025 (official SASEUL notice).
BitMart stopped deposits and new orders from July 26, 2026. It said it would shut down completely on January 31, 2027 (UTC) (BitMart notice).
With no official exchange right now, OTC trading (people buying and selling directly, not through an exchange) seems to be going on. On September 27, 2026, the trading boards of two Naver Cafes (Naver is Korea's biggest web portal, and its "cafes" are online community boards), "사슬EX" (SASEUL EX, cafe.naver.com/saseulex) and "사슬 크립토 커뮤니티" (SASEUL Crypto Community, cafe.naver.com/saseullabs), had sell posts from that day. The person-to-person trading board saseulp2p.kr also had sell posts up to August 15, 2026. Neither the official notice channel nor the official site points to these places. That doesn't mean these places are scams.
In person-to-person trades, you send won (KRW) first and get the coins later, so there are things to watch out for. You can check whether coins arrived by entering your wallet address on the official explorer (what to do if your coins don't arrive).
Was there an ICO or presale?
The project description says there wasn't. It says no coins were sold in advance to raise money before mining began (no ICO, IEO, private sale or public sale). It also says there's no set-aside share for the team, investors or a foundation. Everything comes out through mining only.
This is the project's own statement. The surest way to check is the block explorer (a website that shows the record book so anyone can look). Look at the very first pages of the record book, and at the addresses (like bank account numbers) holding the most coins.
The network right now
How many nodes are there?
46 / 74 on the official block explorer at 9:23 on September 27, 2026 (Korea time). It's a count of nodes (computers that hold a copy of the record book and keep swapping updates).
This number changes within minutes. The same day it was 46 / 63 at 9:56, and 46 / 74 again at 16:25.
The first number is computers mining now (Active Miner). The second is computers whose record book is up to date (Synced Node). The question-mark note on the Nodes box on the explorer's front page says so.
On September 23, 2026, it was 46 / 63.
In an official notice on May 16, 2024 (#57), the SASEUL team said about 20,000 nodes were running. An article also reported "over 20,000 nodes" as of November 14, 2023. 20,000 is an old official figure; today's explorer count is shown above.
The node count went down, but mining difficulty rose about 47,000 times from May 2024 to September 2026.
Difficulty numbers in detail
The node count went down, but mining difficulty went up. It went from 8,808,793,144 at 23:12 on May 16, 2024 to 412,942,642,739,300 at 9:22 on September 27, 2026, about 47,000 times (official explorer mining record pages no. 1,070,330 and 2,324,047, details). The node count is how many computers there are, and difficulty is the network's total calculating power, so they move separately.
Why the node count and difficulty move separately is shown with a picture in the 20,000 nodes post.
What are the network numbers right now?
These values are read every day from the mining group's site and the official explorer. The date and time they were read are shown below the table.
| Item | Value |
|---|---|
| Network hashrate (shown on the pool page) | 5.02 TH/s |
| Nodes shown on the explorer | 43/60 |
| Difficulty (explorer) | 274T |
| Resource block height | 2,328,164 |
| Main block height | 4,420,675 |
| Machines mining on saseulmine.com | 7 |
Is SASEUL's source code public?
Only part of it. Source code means the blueprint of a program.
The official GitHub (a site where developers post their blueprints) has explanation documents, developer tools, sample programs and the whitepaper (the project's introduction booklet). The samples show how to build programs that run on their own on the blockchain.
The core blueprint for the computers that run the record book couldn't be found on the official GitHub. That's as of September 23, 2026. Developer guides are on the official docs site.
Things that are often stated wrong
You'll often see these in web posts and AI answers. They don't match what can be checked today.
| Often said | What checks out today |
|---|---|
| Individuals can't mine it, and you need a special internet line | One graphics card in a home computer and regular home internet are enough. You join a group that mines together |
| Nobody knows if a graphics card can mine it | It can be mined with an NVIDIA graphics card. You need version 12.x or 13.x of NVIDIA's calculating program (GTX 10 series: 12.x only) |
| 16,000 to 20,000 nodes, third in the world | An old official figure. In an official notice on May 16, 2024 (#57), the SASEUL team said about 20,000. 2023 articles gave these numbers too (16,000 in a November 13, 2023 article, 20,000 as of November 14). "Third" showed up in May and September 2023 articles, when there were about 600 to 5,000 nodes (details). At 9:23 on September 27, 2026 (Korea time), the explorer showed 46 mining and 74 computers with an up-to-date record book |
| 1,000 times faster than Bitcoin | A June 8, 2022 article (in Korean) put 1,000x in its headline, but I couldn't find what the article measured. Compare the project description's figures (processed in about 4 seconds, set after about 600 seconds) with Bitcoin. Bitcoin takes 10 minutes per page on average, and about 1 hour until six more pages are added and it sets. Depending on what you compare, it's about 6 to 150 times. Going by the official docs' 6 to 8 seconds to final, it comes out different again |
| It's mined with hard drives, not graphics cards | That's how 2023 articles described it. The mining book that produces SL today uses proof of work, mined with NVIDIA graphics cards. Hard drives are used by the computers that store the record book, and the project description says those get a separate reward |
| There's no block explorer | There's an official explorer at explorer.saseul.com. It's listed on CoinMarketCap too. But the core blueprint that runs the record book isn't on the official GitHub (checked 2026-09-23) |
| Did the mainnet start May 16 or May 17? | May 16 in world standard time, May 17 in Korea time. It's the same day |
| Xphere and ZIGAP were also made by ArtiFriends | SASEUL and Guardee are by ArtiFriends. Xphere (coin XP) and ZIGAP are by Seoul Labs. Seoul Labs signed a business agreement with ArtiFriends in 2023 (checked 2026-09-24) |
If something here is wrong, please report it through the tip form.
Sources
- CoinMarketCap · SASEUL project description and market data · checked 2026-09-23
- Official SASEUL explorer Statistics (nodes 46 / 74, Validators box 9 seats with 7 different addresses, Refine Multiplier 42.763%, Total Supply 3,474,603,007 SL, Next Reduction 2027-01-12) · checked 2026-09-27 09:23 (nodes 46 / 63 at 09:56, 46 / 74 at 16:25)
- Official SASEUL explorer screen script app.min.js (v1.6.3) (how the next reduction date is worked out) · checked 2026-09-27
- Official SASEUL explorer, explorer.saseul.com (nodes 46 / 63) · checked 2026-09-23
- Official SASEUL docs · Node Overview (final in 6 to 8 seconds, HAP-2, validators) · version updated 2026-03-09, checked 2026-09-27
- Official SASEUL docs · Command Line Interface (refine: the command that turns piled-up resource into SL) · version updated 2026-03-09, checked 2026-09-27
- Official SASEUL docs · System Method (sample Refine contract: resource refined × multiplier, 0.84375) · 2023-04-16, checked 2026-09-27
- Official SASEUL GitHub · Refine contract example in sample-contracts (system/sl/refine.js, version 4) (when this period's output passes the limit of 1 billion × the rate, the rate is multiplied by 0.84375) · checked 2026-09-30
- Official SASEUL node main.saseul.net block lookup (GetBlock, the same lookup the explorer uses): total supply after the Refine in main block 4,420,040 (2026-09-30 12:55:50 Korea time) 3,477,759,957 SL · checked 2026-10-01
- Contract list query (ListCode, the same query the explorer uses) on the official SASEUL node main.saseul.net: Refine contract 286d8e… version 4, no fee subtraction · checked 2026-09-27
- Official SASEUL site · FAQ (about 5.5 billion SL over 100 years, about 15.9% less each year) · checked 2026-09-27
- Official SASEUL GitHub · checked 2026-09-23
- Official SASEUL Telegram notice · BitMart listing · checked 2026-09-24
- Naver Cafe "사슬EX" (cafe.naver.com/saseulex) "Marketplace (사슬 장터)" board, "사슬 크립토 커뮤니티" (cafe.naver.com/saseullabs) "사슬거래" board, person-to-person trading board saseulp2p.kr · checked 2026-09-27 (OTC sell posts)
- BitMart notice · Important Notice Regarding the Orderly Cessation of BitMart Operations · checked 2026-09-27
- App Store · Guardee · checked 2026-09-24
- App Store · ZIGAP · checked 2026-09-24
- Incheon Ilbo · article on Seoul Labs launching Xphere (in Korean) · 2025-02-19
- Blockchain Today · article on the Seoul Labs and ArtiFriends business agreement (in Korean) · 2023-09-20
- Article on passing 20,000 nodes (in Korean) · figure as of November 14, 2023
- Official SASEUL Telegram notice #57 · mainnet 2nd anniversary, about 20,000 nodes · 2024-05-16, original checked 2026-09-27
- Seoul Shinmun · article on 16,000+ nodes (in Korean) · 2023-11-13
- Electronic Times · "비트코인보다 1000배 빠른 토종 메인넷 '사슬' 오픈" (in Korean) · 2022-06-08 (1,000x in the headline; couldn't find what the article measured; original checked 2026-09-27)
- Network numbers: values read daily from the mining group's site and the official explorer