SRC-20

SRC-20 is a token standard built on Bitcoin Stamps. A token’s deploy, its mints, and its transfers are all stamp transactions, which an index reads to know who holds what.

Because the ledger is derived from stamp transactions rather than from a smart contract, an SRC-20 trade cannot be a single atomic swap. That fact shapes everything below.

Token facts

Fact	Meaning
Ticker	The short name, such as KEVIN. Not an identity
Deployment transaction	The transaction that created the token. This is the identity
Deployment block and time	When it happened
Creator	The deploying address
Max supply and minted supply	Together these give mint progress
Mint limit	The maximum a single mint may claim
Holders	Addresses holding a balance, from the index

Two tokens can share a ticker. StampDEX never merges them. See Deployment identity.

The three-transaction listing flow

An SRC-20 sale on StampDEX is three Bitcoin transactions, in this order.

	What it does	Who signs
TX1	The buyer sends the exact total in BTC to a per-listing address	The buyer
TX2	Moves the seller’s tokens into the per-listing escrow, funded by TX1	The seller pre-signed their input at listing time; StampDEX signs the funding input
TX3	Delivers the tokens to the buyer, pays the seller, and pays the service fee	StampDEX, from the escrow key

The seller’s input in TX2 is signed with SIGHASH_ALL | ANYONECANPAY at the moment they create the listing. That signature commits the seller to their side and to nothing else, which is why a listing can sit on the book without locking the rest of the seller’s wallet.

The escrow keys for the per-listing addresses are generated server side, stored encrypted, never returned by any API, and nulled when a draft expires.

This is not an atomic swap and StampDEX does not describe it as one. See Where your funds are.

Listing constraints

Rule	Value
Minimum trade total	2,000 sats
Amount and unit price	Positive integers, and their product must stay exact
Anchor UTXO	The seller needs a small marker output. StampDEX builds one if you have none
Unsigned draft lifetime	30 minutes
Buyer lock lifetime	30 minutes

A trade at the 2,000 sat minimum pays 500 sats of service fee from each side, because the per-side floor dominates at that size. Read Fees before listing anything small.

What is not available for SRC-20

The ecosystem registry records these as unsupported, with reasons:

• update-listing: listings must be cancelled and relisted, because no atomic listing update is implemented.
• make-offer, accept-offer, sell: there is no executable offer workflow on this marketplace surface.
• reconcile: this surface has no reconcile authority.

cancel-offer and settle are supported for SRC-20 and are not supported for stamps. See What you can and cannot do.

Related

• Buy SRC-20
• Sell SRC-20
• Order lifecycle