;; ---------------------------------------------------------
;; SIP-10 Taxed Fungible Token Contract | Modified from STXCITY Token
;; ---------------------------------------------------------
;; Implements a token with a 10% tax on all transfers distributed as follows:
;; - 4% automatically provides liquidity to AMM contract
;; - 4% redistributed to STX, held by AMM contract
;; - 2% burned to make the token deflationary
;; Errors
(define-constant ERR-UNAUTHORIZED u401)
(define-constant ERR-NOT-OWNER u402)
(define-constant ERR-INVALID-PARAMETERS u403)
(define-constant ERR-NOT-ENOUGH-FUND u101)
(define-constant ERR-NOT-AMM-CONTRACT u501)
(impl-trait .sip-010-trait-ft-standard.sip-010-trait)
;; Constants
(define-constant MAXSUPPLY u10000000000000000) ;; 10 billion with 6 decimals
(define-constant LIQUIDITY-TAX-PERCENT u4) ;; 4% for liquidity
(define-constant STX-REDISTRIBUTION-PERCENT u4) ;; 4% redistributed to STX
(define-constant BURN-TAX-PERCENT u2) ;; 2% burned
(define-constant TOTAL-TAX-PERCENT u10) ;; 10% total tax
;; No burn address needed as we use ft-burn? directly
;; Variables
(define-fungible-token TAXED-TOKEN MAXSUPPLY)
(define-data-var contract-owner principal tx-sender)
;; Hardcoded AMM contract address - this creates a permanent 1:1 relationship
(define-constant AMM-CONTRACT 'ST1PQHQKV0RJXZFY1DGX8MNSNYVE3VGZJSRTPGZGM.taxed-token-amm)
;; Check if caller is the AMM contract
(define-read-only (is-amm-contract (caller principal))
(is-eq caller AMM-CONTRACT)
)
;; SIP-10 Functions with tax mechanism
(define-public (transfer (amount uint) (from principal) (to principal) (memo (optional (buff 34))))
(begin
(asserts! (is-eq from tx-sender) (err ERR-UNAUTHORIZED))
;; Skip tax for transfers to/from AMM contract to avoid double taxation
(if (or (is-amm-contract from) (is-amm-contract to))
(ft-transfer? TAXED-TOKEN amount from to)
(apply-tax-and-transfer amount from to memo)
)
)
)
;; Apply tax and transfer remaining amount
(define-private (apply-tax-and-transfer (amount uint) (from principal) (to principal) (memo (optional (buff 34))))
(let (
(liquidity-amount (/ (* amount LIQUIDITY-TAX-PERCENT) u100))
(stx-redistribution-amount (/ (* amount STX-REDISTRIBUTION-PERCENT) u100))
(burn-amount (/ (* amount BURN-TAX-PERCENT) u100))
(recipient-amount (- amount (+ liquidity-amount (+ stx-redistribution-amount burn-amount))))
(amm-contract-principal (var-get amm-contract))
)
;; Transfer main amount to recipient
(try! (ft-transfer? TAXED-TOKEN recipient-amount from to))
;; Transfer liquidity amount to AMM contract
(try! (ft-transfer? TAXED-TOKEN liquidity-amount from amm-contract-principal))
;; Transfer STX redistribution amount to AMM contract
(try! (ft-transfer? TAXED-TOKEN stx-redistribution-amount from amm-contract-principal))
;; Burn the burn amount using ft-burn? to reduce circulating supply
(try! (ft-burn? TAXED-TOKEN burn-amount from))
;; Notify the AMM contract about the tax collection (it will handle the rest)
(as-contract (contract-call? amm-contract-principal process-tax-collection liquidity-amount stx-redistribution-amount))
)
)
;; Public function to allow the AMM contract to transfer tokens without tax
;; This is needed for AMM operations to avoid double taxation
(define-public (transfer-from-amm (amount uint) (to principal) (memo (optional (buff 34))))
(begin
(asserts! (is-amm-contract tx-sender) (err ERR-NOT-AMM-CONTRACT))
(as-contract (ft-transfer? TAXED-TOKEN amount tx-sender to))
)
)
;; DEFINE METADATA
(define-data-var token-uri (optional (string-utf8 256)) (some u"https://example.com/taxed-token-metadata.json"))
(define-public (set-token-uri (value (string-utf8 256)))
(begin
(asserts! (is-eq tx-sender (var-get contract-owner)) (err ERR-UNAUTHORIZED))
(var-set token-uri (some value))
(ok (print {
notification: "token-metadata-update",
payload: {
contract-id: (as-contract tx-sender),
token-class: "ft"
}
})
)
)
)
(define-read-only (get-balance (owner principal))
(ok (ft-get-balance TAXED-TOKEN owner))
)
(define-read-only (get-name)
(ok "Taxed Token")
)
(define-read-only (get-symbol)
(ok "TAXT")
)
(define-read-only (get-decimals)
(ok u6)
)
(define-read-only (get-total-supply)
(ok (ft-get-supply TAXED-TOKEN))
)
(define-read-only (get-token-uri)
(ok (var-get token-uri))
)
(define-read-only (get-owner)
(ok (var-get contract-owner))
)
;; transfer ownership
(define-public (transfer-ownership (new-owner principal))
(begin
;; Checks if the sender is the current owner
(if (is-eq tx-sender (var-get contract-owner))
(begin
;; Sets the new owner
(var-set contract-owner new-owner)
;; Returns success message
(ok "Ownership transferred successfully"))
;; Error if the sender is not the owner
(err ERR-NOT-OWNER)))
)
;; Utility Functions
(define-public (send-many (recipients (list 200 { to: principal, amount: uint, memo: (optional (buff 34)) })))
(fold check-err (map send-token recipients) (ok true))
)
(define-private (check-err (result (response bool uint)) (prior (response bool uint)))
(match prior ok-value result err-value (err err-value))
)
(define-private (send-token (recipient { to: principal, amount: uint, memo: (optional (buff 34)) }))
(send-token-with-memo (get amount recipient) (get to recipient) (get memo recipient))
)
(define-private (send-token-with-memo (amount uint) (to principal) (memo (optional (buff 34))))
(let ((transferOk (try! (transfer amount tx-sender to memo))))
(ok transferOk)
)
)
;; Initial minting of tokens to the contract owner
(begin
(try! (ft-mint? TAXED-TOKEN MAXSUPPLY (var-get contract-owner)))
)
