Signature
Count the signatures on the transaction. Write 5,000 lamports for each. Two signatures mean 10,000 lamports before any other fee is considered.
Ilsandong-gu · Goyang
Solana learning library
The fee sits on the paper, and we read it with you.
At the window desk in Munbong-dong, a librarian marks one Solana transaction: the signature fee in lamports, any priority fee, and the SOL an account holds so it can keep its data.
Window desk, 353 Gyeondalsan-ro. Last full sitting starts at 16:45.
01 — The sitting
Seventy-five minutes with one receipt
The flagship chair is a desk session on SOL and network fees. You bring a printed transaction, or we open drawer A and use a library sample. Hana Seo counts signatures first. The base network fee is 5,000 lamports per signature. One SOL is 1,000,000,000 lamports, so that line is small, and it is still the line people skip.
Anything the sender attached so a leader might include the transaction sooner goes in the middle column. SOL kept so an account stays rent-exempt goes in the third column, under the words held balance. You take the worksheet home. The room keeps no copy.
02 — What the pencil marks
Three labels, in that order
Priority
If the receipt shows a compute-unit price and a limit, the extra fee sits here. Two transfers of the same SOL can differ on this column alone.
Held balance
A rent-exempt minimum is SOL the account keeps, tied to how much data it stores. It is written apart from the fee that paid for processing.
03 — Other chairs
A Saturday table, and a shorter return
Saturday table on lamports
A two-hour small group around the long table, working through signature fees, priority fees, and the SOL an account holds, using library samples only.
45,000 KRW per seat · 2 hours
Return reading
Forty minutes for someone who has already sat the window desk and wants a newer receipt marked with the same three columns.
40,000 KRW · 40 minutes
I brought a transfer where the priority fee was larger than the signature line, and I had been telling my brother the whole total was a tax. Hana covered the total with a card until I had written 5,000 lamports for the one signature.
04 — From the desk
Readers who sat with a printout
Stories on the reviews page name the sitting, the month, and the column that caused the trouble. One of them wishes the worksheet had a spare row. The rest describe a specific receipt.
05 — The room
Tuesday to Friday
Desk sessions and return readings, 11:00–18:00. The last full sitting begins at 16:45.
Saturday
The four-chair table runs 10:00–12:00 when at least two seats are requested.
Sunday and Monday
The room is closed. Email still reaches the desk, and we reply on the next open day.
A chair with your name
Tell us the receipt you want to read.
Write the date you prefer and whether you will bring a printout. We confirm within two working days. The site lists the rates and does not take payment itself.