Source β Alkane 2:81983 β SUBFROST Explorer
Verified Source 2:81983β β Reproducible Commit e33d5e8
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The exact source a sandboxed build reproduced the on-chain wasm from (bit-for-bit) β served from SUBFROST's verified-build database, since the origin repository is private.
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Every fixture below was reversed from the on-chain bytecode, then pinned in a sandboxed rebuild. Reproduced deterministically β the source genuinely compiles to this bytecode.
Build environment
HOME
/home/lee
β embedded registry/git-checkout paths
CARGO_HOME
/home/lee/.cargo
env
CC_wasm32_unknown_unknown=clang-14
Git dependency
repo
kungfuflex/alkanes-rs
rev
d787cdd
β fingerprint git_deps
source-id
bare (matches -C metadata β mono ordering)
src/lib.rs 19,847 B
//! Free Mint Alkane Contract //! //! A modernized and secure version of the free mint alkane contract that follows //! current best practices and security patterns while providing full functionality
//! of a standard token plus free mint capabilities.
use alkanes_runtime : : { declare_alkane , runtime : : AlkaneResponder , message : : MessageDispatch } ;
use alkanes_runtime : : storage : : StoragePointer ;
use alkanes_support : : response : : CallResponse ;
use alkanes_support : : utils : : overflow_error ;
use metashrew_support : : utils : : { consensus_decode } ;
use alkanes_support : : witness : : find_witness_payload ;
use alkanes_support : : { context : : Context , parcel : : AlkaneTransfer } ;
use alkanes_support : : gz ;
use anyhow : : { anyhow , Result } ;
use bitcoin : : { Txid , Transaction } ;
use bitcoin : : hashes : : Hash ;
use metashrew_support : : compat : : to_arraybuffer_layout ;
use metashrew_support : : index_pointer : : KeyValuePointer ;
use std : : sync : : Arc ;
use std : : io : : Cursor ;
/// Constants for token identification
pub const ALKANE_FACTORY_OWNED_TOKEN_ID : u128 = 0x0fff ;
pub const ALKANE_FACTORY_FREE_MINT_ID : u128 = 0x0ffe ;
/// Returns a StoragePointer for the token name
fn name_pointer ( ) - > StoragePointer {
StoragePointer : : from_keyword ( "/name" )
}
/// Returns a StoragePointer for the token symbol
fn symbol_pointer ( ) - > StoragePointer {
StoragePointer : : from_keyword ( "/symbol" )
}
/// Trims a u128 value to a String by removing trailing zeros
pub fn trim ( v : u128 ) - > String {
String : : from_utf8 (
v . to_le_bytes ( )
. into_iter ( )
. fold ( Vec : : < u8 > : : new ( ) , | mut r , v | {
if v ! = 0 {
r . push ( v )
}
r
} ) ,
)
. unwrap ( )
}
/// TokenName struct to hold two u128 values for the name
#[derive(Default, Clone, Copy)]
pub struct TokenName {
pub part1 : u128 ,
pub part2 : u128 ,
}
impl From < TokenName > for String {
fn from ( name : TokenName ) - > Self {
// Trim both parts and concatenate them
format! ( "{}{}" , trim ( name . part1 ) , trim ( name . part2 ) )
}
}
impl TokenName {
pub fn new ( part1 : u128 , part2 : u128 ) - > Self {
Self { part1 , part2 }
}
}
pub struct ContextHandle ( ( ) ) ;
#[cfg(test)]
impl ContextHandle {
/// Get the current transaction bytes
pub fn transaction ( & self ) - > Vec < u8 > {
// This is a placeholder implementation that would normally
// access the transaction from the runtime context
Vec : : new ( )
}
}
impl AlkaneResponder for ContextHandle {
fn execute ( & self ) - > Result < CallResponse > {
Ok ( CallResponse : : default ( ) )
}
}
pub const CONTEXT : ContextHandle = ContextHandle ( ( ) ) ;
/// Extension trait for Context to add transaction_id method
trait ContextExt {
/// Get the transaction ID from the context
fn transaction_id ( & self ) - > Result < Txid > ;
}
#[cfg(test)]
impl ContextExt for Context {
fn transaction_id ( & self ) - > Result < Txid > {
// Test implementation with all zeros
Ok ( Txid : : from_slice ( & [ 0 ; 32 ] ) . unwrap_or_else ( | _ | {
// This should never happen with a valid-length slice
panic! ( "Failed to create zero Txid" )
} ) )
}
}
#[cfg(not(test))]
impl ContextExt for Context {
fn transaction_id ( & self ) - > Result < Txid > {
Ok ( consensus_decode : : < Transaction > ( & mut std : : io : : Cursor : : new ( CONTEXT . transaction ( ) ) ) ? . compute_txid ( ) )
}
}
/// MintableToken trait provides common token functionality
pub trait MintableToken : AlkaneResponder {
/// Get the token name
fn name ( & self ) - > String {
String : : from_utf8 ( self . name_pointer ( ) . get ( ) . as_ref ( ) . clone ( ) )
. expect ( "name not saved as utf-8, did this deployment revert?" )
}
/// Get the token symbol
fn symbol ( & self ) - > String {
String : : from_utf8 ( self . symbol_pointer ( ) . get ( ) . as_ref ( ) . clone ( ) )
. expect ( "symbol not saved as utf-8, did this deployment revert?" )
}
/// Set the token name and symbol
fn set_name_and_symbol ( & self , name : TokenName , symbol : u128 ) {
let name_string : String = name . into ( ) ;
self . name_pointer ( ) . set ( Arc : : new ( name_string . as_bytes ( ) . to_vec ( ) ) ) ;
self . set_string_field ( self . symbol_pointer ( ) , symbol ) ;
}
/// Get the pointer to the token name
fn name_pointer ( & self ) - > StoragePointer {
name_pointer ( )
}
/// Get the pointer to the token symbol
fn symbol_pointer ( & self ) - > StoragePointer {
symbol_pointer ( )
}
/// Set a string field in storage
fn set_string_field ( & self , mut pointer : StoragePointer , v : u128 ) {
pointer . set ( Arc : : new ( trim ( v ) . as_bytes ( ) . to_vec ( ) ) ) ;
}
/// Get the pointer to the total supply
fn total_supply_pointer ( & self ) - > StoragePointer {
StoragePointer : : from_keyword ( "/totalsupply" )
}
/// Get the total supply
fn total_supply ( & self ) - > u128 {
self . total_supply_pointer ( ) . get_value : : < u128 > ( )
}
/// Set the total supply
fn set_total_supply ( & self , v : u128 ) {
self . total_supply_pointer ( ) . set_value : : < u128 > ( v ) ;
}
/// Increase the total supply
fn increase_total_supply ( & self , v : u128 ) - > Result < ( ) > {
self . set_total_supply ( overflow_error ( self . total_supply ( ) . checked_add ( v ) )
. map_err ( | _ | anyhow! ( "total supply overflow" ) ) ? ) ;
Ok ( ( ) )
}
/// Mint new tokens
fn mint ( & self , context : & Context , value : u128 ) - > Result < AlkaneTransfer > {
self . increase_total_supply ( value ) ? ;
Ok ( AlkaneTransfer {
id : context . myself . clone ( ) ,
value ,
} )
}
/// Get the pointer to the token data
fn data_pointer ( & self ) - > StoragePointer {
StoragePointer : : from_keyword ( "/data" )
}
/// Get the token data
fn data ( & self ) - > Vec < u8 > {
gz : : decompress ( self . data_pointer ( ) . get ( ) . as_ref ( ) . clone ( ) ) . unwrap_or_else ( | _ | vec! [ ] )
}
/// Set the token data from the transaction
fn set_data ( & self ) - > Result < ( ) > {
let tx = consensus_decode : : < Transaction > ( & mut Cursor : : new ( CONTEXT . transaction ( ) ) ) ? ;
let data : Vec < u8 > = find_witness_payload ( & tx , 0 ) . unwrap_or_else ( | | vec! [ ] ) ;
self . data_pointer ( ) . set ( Arc : : new ( data ) ) ;
Ok ( ( ) )
}
/// Observe initialization to prevent multiple initializations
fn observe_initialization ( & self ) - > Result < ( ) > {
let mut pointer = StoragePointer : : from_keyword ( "/initialized" ) ;
if pointer . get ( ) . len ( ) = = 0 {
pointer . set_value : : < u8 > ( 0x01 ) ;
Ok ( ( ) )
} else {
Err ( anyhow! ( "already initialized" ) )
}
}
}
/// MintableAlkane implements a free mint token contract with security features
#[derive(Default)]
pub struct MintableAlkane ( ( ) ) ;
impl MintableToken for MintableAlkane { }
/// Message enum for opcode-based dispatch
#[derive(MessageDispatch)]
enum MintableAlkaneMessage {
/// Initialize the token with configuration
#[opcode(0)]
Initialize {
/// Initial token units
token_units : u128 ,
/// Value per mint
value_per_mint : u128 ,
/// Maximum supply cap (0 for unlimited)
cap : u128 ,
/// Token name part 1
name_part1 : u128 ,
/// Token name part 2
name_part2 : u128 ,
/// Token symbol
symbol : u128 ,
} ,
/// Mint new tokens
#[opcode(77)]
MintTokens ,
/// Get the token name
#[opcode(99)]
#[returns(String)]
GetName ,
/// Get the token symbol
#[opcode(100)]
#[returns(String)]
GetSymbol ,
/// Get the total supply
#[opcode(101)]
#[returns(u128)]
GetTotalSupply ,
/// Get the maximum supply cap
#[opcode(102)]
#[returns(u128)]
GetCap ,
/// Get the total minted count
#[opcode(103)]
#[returns(u128)]
GetMinted ,
/// Get the value per mint
#[opcode(104)]
#[returns(u128)]
GetValuePerMint ,
/// Get the token data
#[opcode(1000)]
#[returns(Vec<u8>)]
GetData ,
}
impl MintableAlkane {
/// Get the pointer to the minted counter
pub fn minted_pointer ( & self ) - > StoragePointer {
StoragePointer : : from_keyword ( "/minted" )
}
/// Get the total minted count
pub fn minted ( & self ) - > u128 {
self . minted_pointer ( ) . get_value : : < u128 > ( )
}
/// Set the total minted count
pub fn set_minted ( & self , v : u128 ) {
self . minted_pointer ( ) . set_value : : < u128 > ( v ) ;
}
/// Increment the mint counter
pub fn increment_mint ( & self ) - > Result < ( ) > {
self . set_minted ( overflow_error ( self . minted ( ) . checked_add ( 1u128 ) )
. map_err ( | _ | anyhow! ( "mint counter overflow" ) ) ? ) ;
Ok ( ( ) )
}
/// Get the pointer to the value per mint
pub fn value_per_mint_pointer ( & self ) - > StoragePointer {
StoragePointer : : from_keyword ( "/value-per-mint" )
}
/// Get the value per mint
pub fn value_per_mint ( & self ) - > u128 {
self . value_per_mint_pointer ( ) . get_value : : < u128 > ( )
}
/// Set the value per mint
pub fn set_value_per_mint ( & self , v : u128 ) {
self . value_per_mint_pointer ( ) . set_value : : < u128 > ( v ) ;
}
/// Get the pointer to the supply cap
pub fn cap_pointer ( & self ) - > StoragePointer {
StoragePointer : : from_keyword ( "/cap" )
}
/// Get the supply cap
pub fn cap ( & self ) - > u128 {
self . cap_pointer ( ) . get_value : : < u128 > ( )
}
/// Set the supply cap (0 means unlimited)
pub fn set_cap ( & self , v : u128 ) {
self . cap_pointer ( ) . set_value : : < u128 > ( if v = = 0 { u128 : : MAX } else { v } ) ;
}
/// Check if a transaction hash has been used for minting
pub fn has_tx_hash ( & self , txid : & Txid ) - > bool {
StoragePointer : : from_keyword ( "/tx-hashes/" )
. select ( & txid . as_byte_array ( ) . to_vec ( ) )
. get_value : : < u8 > ( ) = = 1
}
/// Add a transaction hash to the used set
pub fn add_tx_hash ( & self , txid : & Txid ) - > Result < ( ) > {
StoragePointer : : from_keyword ( "/tx-hashes/" )
. select ( & txid . as_byte_array ( ) . to_vec ( ) )
. set_value : : < u8 > ( 0x01 ) ;
Ok ( ( ) )
}
/// Initialize the token with configuration
fn initialize (
& self ,
token_units : u128 ,
value_per_mint : u128 ,
cap : u128 ,
name_part1 : u128 ,
name_part2 : u128 ,
symbol : u128 ,
) - > Result < CallResponse > {
let context = self . context ( ) ? ;
let mut response = CallResponse : : forward ( & context . incoming_alkanes ) ;
// Prevent multiple initializations
self . observe_initialization ( )
. map_err ( | _ | anyhow! ( "Contract already initialized" ) ) ? ;
// Set configuration
self . set_value_per_mint ( value_per_mint ) ;
self . set_cap ( cap ) ;
self . set_data ( ) ? ;
// Create TokenName from the two parts
let name = TokenName : : new ( name_part1 , name_part2 ) ;
< Self as MintableToken > : : set_name_and_symbol ( self , name , symbol ) ;
// Mint initial tokens
if token_units > 0 {
response . alkanes . 0 . push ( self . mint ( & context , token_units ) ? ) ;
}
Ok ( response )
}
/// Mint new tokens
fn mint_tokens ( & self ) - > Result < CallResponse > {
let context = self . context ( ) ? ;
let mut response = CallResponse : : forward ( & context . incoming_alkanes ) ;
// Get transaction ID
let txid = context . transaction_id ( ) ? ;
// Enforce one mint per transaction
if self . has_tx_hash ( & txid ) {
return Err ( anyhow! ( "Transaction already used for minting" ) ) ;
}
// Check if minting would exceed cap
if self . minted ( ) > = self . cap ( ) {
return Err ( anyhow! ( "Supply cap reached: {} of {}" , self . minted ( ) , self . cap ( ) ) ) ;
}
// Record transaction hash
self . add_tx_hash ( & txid ) ? ;
// Mint tokens
let value = self . value_per_mint ( ) ;
response . alkanes . 0 . push ( self . mint ( & context , value ) ? ) ;
// Increment mint counter
self . increment_mint ( ) ? ;
Ok ( response )
}
/// Set the token name and symbol
fn set_name_and_symbol ( & self , name_part1 : u128 , name_part2 : u128 , symbol : u128 ) - > Result < CallResponse > {
let context = self . context ( ) ? ;
let response = CallResponse : : forward ( & context . incoming_alkanes ) ;
// Create TokenName from the two parts
let name = TokenName : : new ( name_part1 , name_part2 ) ;
< Self as MintableToken > : : set_name_and_symbol ( self , name , symbol ) ;
Ok ( response )
}
/// Get the token name
fn get_name ( & self ) - > Result < CallResponse > {
let context = self . context ( ) ? ;
let mut response = CallResponse : : forward ( & context . incoming_alkanes ) ;
response . data = self . name ( ) . into_bytes ( ) . to_vec ( ) ;
Ok ( response )
}
/// Get the token symbol
fn get_symbol ( & self ) - > Result < CallResponse > {
let context = self . context ( ) ? ;
let mut response = CallResponse : : forward ( & context . incoming_alkanes ) ;
response . data = self . symbol ( ) . into_bytes ( ) . to_vec ( ) ;
Ok ( response )
}
/// Get the total supply
fn get_total_supply ( & self ) - > Result < CallResponse > {
let context = self . context ( ) ? ;
let mut response = CallResponse : : forward ( & context . incoming_alkanes ) ;
response . data = self . total_supply ( ) . to_le_bytes ( ) . to_vec ( ) ;
Ok ( response )
}
/// Get the maximum supply cap
fn get_cap ( & self ) - > Result < CallResponse > {
let context = self . context ( ) ? ;
let mut response = CallResponse : : forward ( & context . incoming_alkanes ) ;
response . data = self . cap ( ) . to_le_bytes ( ) . to_vec ( ) ;
Ok ( response )
}
/// Get the total minted count
fn get_minted ( & self ) - > Result < CallResponse > {
let context = self . context ( ) ? ;
let mut response = CallResponse : : forward ( & context . incoming_alkanes ) ;
response . data = self . minted ( ) . to_le_bytes ( ) . to_vec ( ) ;
Ok ( response )
}
/// Get the value per mint
fn get_value_per_mint ( & self ) - > Result < CallResponse > {
let context = self . context ( ) ? ;
let mut response = CallResponse : : forward ( & context . incoming_alkanes ) ;
response . data = self . value_per_mint ( ) . to_le_bytes ( ) . to_vec ( ) ;
Ok ( response )
}
/// Get the token data
fn get_data ( & self ) - > Result < CallResponse > {
let context = self . context ( ) ? ;
let mut response = CallResponse : : forward ( & context . incoming_alkanes ) ;
response . data = self . data ( ) ;
Ok ( response )
}
}
impl AlkaneResponder for MintableAlkane {
fn execute ( & self ) - > Result < CallResponse > {
// This method should not be called directly when using MessageDispatch
Err ( anyhow! ( "This method should not be called directly. Use the declare_alkane macro instead." ) )
}
}
// Use the MessageDispatch macro for opcode handling
declare_alkane! {
impl AlkaneResponder for MintableAlkane {
type Message = MintableAlkaneMessage ;
}
}
#[cfg(test)]
mod tests {
use super : : * ;
use anyhow : : Result ;
use wasm_bindgen_test : : wasm_bindgen_test ;
// Reset all storage keys used in tests
fn reset_test_storage ( ) {
// Clear all storage keys used in tests
StoragePointer : : from_keyword ( "/initialized" ) . set ( Arc : : new ( Vec : : new ( ) ) ) ;
StoragePointer : : from_keyword ( "/name" ) . set ( Arc : : new ( Vec : : new ( ) ) ) ;
StoragePointer : : from_keyword ( "/symbol" ) . set ( Arc : : new ( Vec : : new ( ) ) ) ;
StoragePointer : : from_keyword ( "/totalsupply" ) . set ( Arc : : new ( Vec : : new ( ) ) ) ;
StoragePointer : : from_keyword ( "/minted" ) . set ( Arc : : new ( Vec : : new ( ) ) ) ;
StoragePointer : : from_keyword ( "/value-per-mint" ) . set ( Arc : : new ( Vec : : new ( ) ) ) ;
StoragePointer : : from_keyword ( "/cap" ) . set ( Arc : : new ( Vec : : new ( ) ) ) ;
StoragePointer : : from_keyword ( "/data" ) . set ( Arc : : new ( Vec : : new ( ) ) ) ;
StoragePointer : : from_keyword ( "/tx-hashes" ) . set ( Arc : : new ( Vec : : new ( ) ) ) ;
}
#[wasm_bindgen_test]
fn test_initialization ( ) {
// Reset storage
reset_test_storage ( ) ;
// Create the MintableAlkane instance
let alkane = MintableAlkane : : default ( ) ;
// Set values
let value_per_mint = 10u128 ;
let cap = 100u128 ;
alkane . set_value_per_mint ( value_per_mint ) ;
alkane . set_cap ( cap ) ;
// Verify the values were set correctly
assert_eq! ( alkane . value_per_mint ( ) , value_per_mint ) ;
assert_eq! ( alkane . cap ( ) , cap ) ;
}
#[wasm_bindgen_test]
fn test_cap_enforcement ( ) {
// Reset storage
reset_test_storage ( ) ;
// Create the MintableAlkane instance
let alkane = MintableAlkane : : default ( ) ;
// Set a low cap
alkane . set_cap ( 5u128 ) ;
// Verify the cap was set correctly
assert_eq! ( alkane . cap ( ) , 5u128 ) ;
}
#[wasm_bindgen_test]
fn test_mint_functionality ( ) - > Result < ( ) > {
// Reset storage
reset_test_storage ( ) ;
// Create the MintableAlkane instance
let alkane = MintableAlkane : : default ( ) ;
// Initialize the contract
alkane . observe_initialization ( ) ? ;
alkane . set_value_per_mint ( 10u128 ) ;
alkane . set_cap ( 100u128 ) ;
// Verify initial state
assert_eq! ( alkane . total_supply ( ) , 0u128 ) ;
assert_eq! ( alkane . minted ( ) , 0u128 ) ;
Ok ( ( ) )
}
#[wasm_bindgen_test]
fn test_name_and_symbol ( ) - > Result < ( ) > {
// Reset storage
reset_test_storage ( ) ;
// Create the MintableAlkane instance
let alkane = MintableAlkane : : default ( ) ;
// Initialize the contract
alkane . observe_initialization ( ) ? ;
// Set name and symbol directly using the MintableToken trait methods
// Note: We need to use little-endian encoding because of how trim() works
let name_part1 = 0x54534554 u128 ; // "TEST" in little-endian
let name_part2 = 0x32 u128 ; // "2" in little-endian
let symbol = 0x545354 u128 ; // "TST" in little-endian
// Create TokenName from the two parts
let name = TokenName : : new ( name_part1 , name_part2 ) ;
< MintableAlkane as MintableToken > : : set_name_and_symbol ( & alkane , name , symbol ) ;
// Verify name and symbol
assert_eq! ( < MintableAlkane as MintableToken > : : name ( & alkane ) , "TEST2" ) ;
assert_eq! ( < MintableAlkane as MintableToken > : : symbol ( & alkane ) , "TST" ) ;
Ok ( ( ) )
}
#[wasm_bindgen_test]
fn test_initialization_guard ( ) {
// Reset storage
reset_test_storage ( ) ;
// Create the MintableAlkane instance
let alkane = MintableAlkane : : default ( ) ;
// First initialization should succeed
assert! ( alkane . observe_initialization ( ) . is_ok ( ) ) ;
// Second initialization should fail
assert! ( alkane . observe_initialization ( ) . is_err ( ) ) ;
}
#[wasm_bindgen_test]
fn test_total_supply_increase ( ) - > Result < ( ) > {
// Reset storage
reset_test_storage ( ) ;
// Create the MintableAlkane instance
let alkane = MintableAlkane : : default ( ) ;
// Initialize the contract
alkane . observe_initialization ( ) ? ;
// Initial total supply should be 0
assert_eq! ( alkane . total_supply ( ) , 0u128 ) ;
// Increase total supply
alkane . increase_total_supply ( 50u128 ) ? ;
// Verify total supply was increased
assert_eq! ( alkane . total_supply ( ) , 50u128 ) ;
// Increase total supply again
alkane . increase_total_supply ( 25u128 ) ? ;
// Verify total supply was increased again
assert_eq! ( alkane . total_supply ( ) , 75u128 ) ;
Ok ( ( ) )
}
}
