A scan says whether a coin could be bought and sold at the block it was read.
Give it a chain and a contract address. It buys a little of the coin with a wallet holding nothing, sells all of it back, and reports what actually settled. Every finding carries the number it was measured at and the sentence saying what was seen.
Scan
One coin, read at one block.
What it checks
Eleven questions, asked of the chain.
A reader answers the ones its chain family allows and names the rest as not checked with the reason. Nothing is rounded into a pass.
- Can be bought and sold
- A wallet holding nothing buys the coin and sells all of it back, so what is reported is a settled sale rather than a quote.
- Buy tax
- How much of a buy the contract keeps, measured against what the pool quoted.
- Sell tax
- How much of a sale the contract keeps, measured against what the pool quoted.
- Transfer tax
- How much of a plain transfer between two wallets the contract keeps.
- A second wallet can sell
- Whether a second wallet can sell after the first one has. A contract that lets one address through and nobody else fails here.
- A larger trade still sells
- Whether a larger trade settles on the same terms as a small one.
- Wallets that have sold
- How many wallets other than the deployer have already sold, read from the chain history.
- Authorities renounced
- Whether an owner, a minter, a pauser or a fee setter is still live on the contract.
- Code cannot be changed
- Whether the code at this address can be replaced by whoever deployed it.
- Liquidity burned or locked
- How much of the pool is burned or locked rather than held by somebody who can take it.
- Top holders
- How much of the supply the ten largest holders outside the pool hold between them.
What it cannot tell you
A reading is one block old the moment it is taken.
- A scan reads the chain at one block. It cannot see what an owner does at the next one.
- A scan reads a contract. It cannot see a team that stops working, or a scam that happens off the chain.
- There is no score out of a hundred here. A blended number is a claim nobody can check, so what you get is a list of findings you can go and check against the chain yourself.
How BidMeme uses it
Step one of adding a coin runs this scan.
A coin the registered launchpads have no record of is scanned before anybody is asked for money. A coin that cannot be sold is refused at that step with the finding that refused it. A coin nothing could be proven about carries on and is put in front of a reviewer.
The listing bar is the other half and it is published per coin on the coin's own page.