Credit Token

CREDIT is the liquidity provider (LP) token of Welsh Street Exchange. CREDIT implements the SIP-010 fungible token standard and represents proportional ownership in the WELSH/STREET liquidity pool.

Unlike most DEXs that use internal accounting or NFT positions, Welsh Street issues tradable LP tokens. CREDIT tokens are fully transferable, enabling secondary markets and DeFi composability.

Core Functions

Burn


(define-public (burn (amount uint))
    (begin
      (asserts! (> amount u0) ERR_ZERO_AMOUNT)
 
      ;; Only street-market authorization for liquidity operations
      (asserts! (is-eq contract-caller .street-market) ERR_NOT_AUTHORIZED)
      (try! (ft-burn? credit amount tx-sender))
      (ok {
        amount: amount
      })
    )
)

Mint


(define-public (mint (amount uint))
    (begin
      (asserts! (> amount u0) ERR_ZERO_AMOUNT)
 
      ;; Only street-market authorization for liquidity operations
      (asserts! (is-eq contract-caller .street-market) ERR_NOT_AUTHORIZED)
      (try! (ft-mint? credit amount tx-sender))
      (ok {
        amount: amount
      })
    )
)

Transfer


(define-public (transfer
    (amount uint)
    (sender principal)
    (recipient principal)
    (memo (optional (buff 34)))
  )
  (begin
    (asserts! (> amount u0) ERR_ZERO_AMOUNT)
 
    ;; street-market authorization for liquidity operations
    (asserts! (or (is-eq contract-caller .street-market)
 
    ;; credit-market authorization for distribution tracking during transfers 
                  (is-eq contract-caller .credit-controller)) ERR_NOT_AUTHORIZED)
    (try! (ft-transfer? credit amount sender recipient))
    (match memo content (print content) 0x)
    (ok true)
  )
)

Liquidity Token Models

Tradable LP Tokens


WELSH + STREET → [Pool Contract] → CREDIT Token (SIP-010)
                                         ↓
                                  Tradable Asset

Advantages:

Secondary markets for LP positions
DeFi composability with other protocols
Collateral usage while receiving fees
Transparent ownership representation

Internal Accounting


Multiple Tokens → [Pool Contract]
                         ↓
                  Internal Balances

Limitations:

No LP position trading
Limited protocol composability
Must exit to realize value

Supply Mechanics

CREDIT supply is dynamic — minted when users provide liquidity, burned when users remove liquidity. Only the street-market.clar contract can mint or burn CREDIT tokens via contract-caller authorization.

Token Metadata

Standard: SIP-010 Fungible Token
Decimals: 6
Symbol: CREDIT
Supply: Dynamic (minted/burned with liquidity operations)
Mint Authority: street-market.clar only (contract-caller authorization)
Contract Link: credit-token