.forgejo/workflows/publish.yml

@@ -8,10 +8,10 @@ on:
 
 jobs:
   verify:
-    runs-on: docker
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: https://github.com/actions/setup-java@v4
+      - uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: "25"
@@ -19,7 +19,7 @@ jobs:
   publish:
     if: startsWith(gitea.ref, 'refs/tags/v')
     needs: verify
-    runs-on: docker
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-java@v4

app/src/main/kotlin/rip/crit/twist/bytecode/TwistBytecode.kt

@@ -58,7 +58,6 @@ enum class OpCode(val code: Byte) {
 data class Instruction(val opCode: OpCode, val immediate: ByteArray = byteArrayOf()) {
     init {
         require(opCode != OpCode.PUSH32 || immediate.size == 32)
-        require(opCode == OpCode.PUSH32 || immediate.isEmpty())
     }
 }
 
@@ -79,10 +78,8 @@ object TwistBytecode {
         while (input.hasRemaining()) {
             val code = input.get()
             val op = OpCode.entries.firstOrNull { it.code == code } ?: error("Unknown opcode")
-            val immediate = if (op == OpCode.PUSH32) {
+            val immediate =
-                require(input.remaining() >= 32) { "Truncated PUSH32 immediate" }
+                if (op == OpCode.PUSH32) ByteArray(32).also(input::get) else byteArrayOf()
-                ByteArray(32).also(input::get)
-            } else byteArrayOf()
             output += Instruction(op, immediate)
         }
         return output

app/src/main/kotlin/rip/crit/twist/compiler/ContractIr.kt

@@ -43,49 +43,7 @@ data class ContractIr(
     val functions: List<FunctionIr>,
     val accessPolicy: IrAccessPolicy = IrAccessPolicy(),
 ) {
-    /**
+    fun bytecode(): ByteArray = TwistBytecode.encode(functions.flatMap { it.instructions })
-     * Encodes a deployed contract. Calldata word zero is the function selector and all
-     * function arguments begin at word one. A non-matching selector deterministically reverts.
-     */
-    fun bytecode(): ByteArray {
-        require(functions.map { it.selector }.distinct().size == functions.size) { "Duplicate function selector" }
-        val dispatchSize = 2 + functions.size * 5 + 1
-        var nextBody = dispatchSize
-        val targets = functions.associate { function ->
-            function.selector to nextBody.also { nextBody += function.instructions.size }
-        }
-        val output = mutableListOf(
-            Instruction(OpCode.PUSH32, Word256.ZERO.toBytes()),
-            Instruction(OpCode.CALLDATA_LOAD),
-        )
-        functions.forEach { function ->
-            output += Instruction(OpCode.DUP)
-            output += Instruction(OpCode.PUSH32, Word256.fromLong(function.selector.toLong()).toBytes())
-            output += Instruction(OpCode.EQ)
-            output += Instruction(OpCode.PUSH32, Word256.fromLong(targets.getValue(function.selector).toLong()).toBytes())
-            output += Instruction(OpCode.JUMPI)
-        }
-        output += Instruction(OpCode.REVERT)
-        functions.forEach { function ->
-            val offset = targets.getValue(function.selector)
-            output += function.instructions.mapIndexed { index, instruction ->
-                if (
-                    instruction.opCode == OpCode.PUSH32 &&
-                        function.instructions.getOrNull(index + 1)?.opCode in setOf(OpCode.JUMP, OpCode.JUMPI)
-                ) {
-                    Instruction(
-                        OpCode.PUSH32,
-                        Word256.of(
-                                Word256.fromBytes(instruction.immediate).toBigInteger() +
-                                    java.math.BigInteger.valueOf(offset.toLong())
-                            )
-                            .toBytes(),
-                    )
-                } else instruction
-            }
-        }
-        return TwistBytecode.encode(output)
-    }
 }
 
 data class FunctionIr(val name: String, val selector: Int, val instructions: List<Instruction>)
@@ -125,34 +83,6 @@ class FunctionBuilder {
 
     fun callValue() = op(OpCode.CALLVALUE)
 
-    fun add() = op(OpCode.ADD)
-
-    fun subtract() = op(OpCode.SUB)
-
-    fun multiply() = op(OpCode.MUL)
-
-    fun divide() = op(OpCode.DIV)
-
-    fun equal() = op(OpCode.EQ)
-
-    fun lessThan() = op(OpCode.LT)
-
-    fun greaterThan() = op(OpCode.GT)
-
-    fun jump() = op(OpCode.JUMP)
-
-    fun jumpIf() = op(OpCode.JUMPI)
-
-    fun duplicate() = op(OpCode.DUP)
-
-    fun discard() = op(OpCode.POP)
-
-    fun calldataSize() = op(OpCode.CALLDATA_SIZE)
-
-    fun codeSize() = op(OpCode.CODE_SIZE)
-
-    fun gasRemaining() = op(OpCode.GAS)
-
     fun emitLog() = op(OpCode.LOG)
 
     fun returnWord() = op(OpCode.RETURN)

app/src/main/kotlin/rip/crit/twist/compiler/TwistMlCompiler.kt

@@ -1,285 +0,0 @@
-package rip.crit.twist.compiler
-
-import java.math.BigInteger
-import rip.crit.twist.bytecode.Instruction
-import rip.crit.twist.bytecode.OpCode
-import rip.crit.twist.jit.LLVMBuilder
-import rip.crit.twist.tvm.Word256
-
-/**
- * A compact ML-inspired source language for contracts.
- *
- * Functions take 256-bit calldata words, `let` is lexical, and `load` and `store` are
- * explicit state effects. It deliberately has no implicit conversions or host calls.
- */
-class TwistMlCompiler {
-    fun parse(source: String): TwistMlContract = Parser(source).contract()
-
-    fun compile(source: String): ContractIr = compile(parse(source))
-
-    fun compile(contract: TwistMlContract): ContractIr =
-        ContractIr(
-            contract.name,
-            contract.functions.mapIndexed { index, function ->
-                FunctionIr(function.name, index + 1, Lowerer(function.parameters).lower(function.body))
-            },
-        )
-
-    /** Lowers pure arithmetic and explicit storage effects to portable LLVM IR. */
-    fun lowerToLlvm(source: String, moduleName: String = "twistml"): LLVMBuilder {
-        val contract = parse(source)
-        return LLVMBuilder(moduleName, LlvmLowerer(contract).lower())
-    }
-}
-
-private class LlvmLowerer(private val contract: TwistMlContract) {
-    private var value = 0
-    private var label = 0
-    private val lines = mutableListOf<String>()
-    private var needsLoad = false
-    private var needsStore = false
-    private var needsCaller = false
-    private var needsCallValue = false
-
-    fun lower(): String {
-        contract.functions.forEach { function -> lowerFunction(function) }
-        return buildString {
-            append("target triple = \"unknown-unknown-unknown\"\n")
-            if (needsLoad) append("declare i256 @twist_sload(i256)\n")
-            if (needsStore) append("declare void @twist_sstore(i256, i256)\n")
-            if (needsCaller) append("declare i256 @twist_caller()\n")
-            if (needsCallValue) append("declare i256 @twist_callvalue()\n")
-            append(lines.joinToString("\n"))
-        }
-    }
-
-    private fun lowerFunction(function: TwistMlFunction) {
-        value = 0
-        label = 0
-        val arguments = function.parameters.mapIndexed { index, _ -> "i256 %arg$index" }
-        lines += "define i256 @${function.name}(" + arguments.joinToString(", ") + ") {"
-        lines += "entry:"
-        val environment = function.parameters.mapIndexed { index, name -> name to "%arg$index" }.toMap()
-        val result = emit(function.body, environment)
-        lines += "  ret i256 $result"
-        lines += "}"
-    }
-
-    private fun emit(expression: TwistMlExpr, environment: Map<String, String>): String = when (expression) {
-        is TwistMlExpr.Number -> expression.value.toString()
-        is TwistMlExpr.Variable -> environment[expression.name] ?: error("Unknown variable ${expression.name}")
-        is TwistMlExpr.Let -> emit(expression.body, environment + (expression.name to emit(expression.value, environment)))
-        TwistMlExpr.Caller -> {
-            needsCaller = true
-            call("i256 @twist_caller()")
-        }
-        TwistMlExpr.CallValue -> {
-            needsCallValue = true
-            call("i256 @twist_callvalue()")
-        }
-        is TwistMlExpr.Load -> {
-            needsLoad = true
-            call("i256 @twist_sload(${emit(expression.key, environment)})")
-        }
-        is TwistMlExpr.Store -> {
-            needsStore = true
-            lines += "  call void @twist_sstore(i256 ${emit(expression.key, environment)}, i256 ${emit(expression.value, environment)})"
-            "0"
-        }
-        is TwistMlExpr.Binary -> {
-            val left = emit(expression.left, environment)
-            val right = emit(expression.right, environment)
-            when (expression.operator) {
-                "+" -> instruction("add i256 $left, $right")
-                "-" -> instruction("sub i256 $left, $right")
-                "*" -> instruction("mul i256 $left, $right")
-                "/" -> instruction("udiv i256 $left, $right")
-                "%" -> instruction("urem i256 $left, $right")
-                "&&" -> instruction("and i256 $left, $right")
-                "||" -> instruction("or i256 $left, $right")
-                "=", "==", "<", ">" -> {
-                    val predicate = mapOf("=" to "eq", "==" to "eq", "<" to "ult", ">" to "ugt").getValue(expression.operator)
-                    val comparison = instruction("icmp $predicate i256 $left, $right")
-                    instruction("zext i1 $comparison to i256")
-                }
-                else -> error("Unsupported operator ${expression.operator}")
-            }
-        }
-        is TwistMlExpr.If -> {
-            val condition = emit(expression.condition, environment)
-            val test = instruction("icmp ne i256 $condition, 0")
-            val id = label++
-            val thenLabel = "then$id"
-            val elseLabel = "else$id"
-            val mergeLabel = "merge$id"
-            lines += "  br i1 $test, label %$thenLabel, label %$elseLabel"
-            lines += "$thenLabel:"
-            val thenValue = emit(expression.thenBranch, environment)
-            lines += "  br label %$mergeLabel"
-            lines += "$elseLabel:"
-            val elseValue = emit(expression.elseBranch, environment)
-            lines += "  br label %$mergeLabel"
-            lines += "$mergeLabel:"
-            instruction("phi i256 [$thenValue, %$thenLabel], [$elseValue, %$elseLabel]")
-        }
-    }
-
-    private fun call(body: String): String = instruction("call $body")
-    private fun instruction(body: String): String = "%v${value++}".also { lines += "  $it = $body" }
-}
-
-data class TwistMlContract(val name: String, val functions: List<TwistMlFunction>)
-
-data class TwistMlFunction(val name: String, val parameters: List<String>, val body: TwistMlExpr)
-
-sealed interface TwistMlExpr {
-    data class Number(val value: BigInteger) : TwistMlExpr
-    data class Variable(val name: String) : TwistMlExpr
-    data class Let(val name: String, val value: TwistMlExpr, val body: TwistMlExpr) : TwistMlExpr
-    data class If(val condition: TwistMlExpr, val thenBranch: TwistMlExpr, val elseBranch: TwistMlExpr) : TwistMlExpr
-    data class Binary(val operator: String, val left: TwistMlExpr, val right: TwistMlExpr) : TwistMlExpr
-    data class Load(val key: TwistMlExpr) : TwistMlExpr
-    data class Store(val key: TwistMlExpr, val value: TwistMlExpr) : TwistMlExpr
-    data object Caller : TwistMlExpr
-    data object CallValue : TwistMlExpr
-}
-
-private class Lowerer(parameters: List<String>) {
-    private val parameterValues = parameters.mapIndexed { index, name ->
-        name to listOf(Instruction(OpCode.PUSH32, Word256.fromLong(((index + 1) * 32).toLong()).toBytes()), Instruction(OpCode.CALLDATA_LOAD))
-    }.toMap()
-
-    fun lower(expression: TwistMlExpr): List<Instruction> = expression.lower(parameterValues) + Instruction(OpCode.RETURN)
-
-    private fun TwistMlExpr.lower(environment: Map<String, List<Instruction>>): List<Instruction> = when (this) {
-        is TwistMlExpr.Number -> listOf(Instruction(OpCode.PUSH32, Word256.of(value).toBytes()))
-        is TwistMlExpr.Variable -> environment[name]?.toList() ?: error("Unknown variable $name")
-        is TwistMlExpr.Let -> body.lower(environment + (name to value.lower(environment)))
-        is TwistMlExpr.Binary -> left.lower(environment) + right.lower(environment) + Instruction(operator.opcode())
-        is TwistMlExpr.Load -> key.lower(environment) + Instruction(OpCode.SLOAD)
-        is TwistMlExpr.Store -> key.lower(environment) + value.lower(environment) + Instruction(OpCode.SSTORE) + Instruction(OpCode.PUSH32, Word256.ZERO.toBytes())
-        TwistMlExpr.Caller -> listOf(Instruction(OpCode.CALLER))
-        TwistMlExpr.CallValue -> listOf(Instruction(OpCode.CALLVALUE))
-        is TwistMlExpr.If -> {
-            val conditionCode = condition.lower(environment)
-            val elseCode = elseBranch.lower(environment)
-            val thenCode = thenBranch.lower(environment)
-            val thenStart = conditionCode.size + elseCode.size + 4
-            val end = thenStart + thenCode.size
-            conditionCode +
-                Instruction(OpCode.PUSH32, Word256.fromLong(thenStart.toLong()).toBytes()) +
-                Instruction(OpCode.JUMPI) +
-                elseCode +
-                Instruction(OpCode.PUSH32, Word256.fromLong(end.toLong()).toBytes()) +
-                Instruction(OpCode.JUMP) +
-                thenCode
-        }
-    }
-
-    private fun String.opcode(): OpCode = when (this) {
-        "+" -> OpCode.ADD
-        "-" -> OpCode.SUB
-        "*" -> OpCode.MUL
-        "/" -> OpCode.DIV
-        "%" -> OpCode.MOD
-        "=", "==" -> OpCode.EQ
-        "<" -> OpCode.LT
-        ">" -> OpCode.GT
-        "&&" -> OpCode.AND
-        "||" -> OpCode.OR
-        else -> error("Unsupported operator $this")
-    }
-}
-
-private class Parser(source: String) {
-    private val tokens = Regex("[A-Za-z_][A-Za-z0-9_]*|[0-9]+|&&|\\|\\||==|[{}(),;=+*/%<>-]")
-        .findAll(source).map { it.value }.toList()
-    private var position = 0
-
-    fun contract(): TwistMlContract {
-        expect("contract")
-        val name = identifier()
-        expect("{")
-        val functions = buildList {
-            while (peek() != "}") add(function())
-        }
-        expect("}")
-        require(position == tokens.size) { "Unexpected token ${peek()}" }
-        return TwistMlContract(name, functions)
-    }
-
-    private fun function(): TwistMlFunction {
-        expect("fun")
-        val name = identifier()
-        expect("(")
-        val parameters = mutableListOf<String>()
-        if (peek() != ")") do { parameters += identifier() } while (takeIf(","))
-        expect(")")
-        expect("=")
-        val body = expression()
-        takeIf(";")
-        return TwistMlFunction(name, parameters, body)
-    }
-
-    private fun expression(): TwistMlExpr {
-        if (takeIf("let")) {
-            val name = identifier()
-            expect("=")
-            val value = expression()
-            expect("in")
-            return TwistMlExpr.Let(name, value, expression())
-        }
-        if (takeIf("if")) {
-            val condition = expression()
-            expect("then")
-            val yes = expression()
-            expect("else")
-            return TwistMlExpr.If(condition, yes, expression())
-        }
-        return binary(0)
-    }
-
-    private fun binary(minimum: Int): TwistMlExpr {
-        var left = primary()
-        while (precedence(peek()) >= minimum) {
-            val operator = next()
-            val precedence = precedence(operator)
-            left = TwistMlExpr.Binary(operator, left, binary(precedence + 1))
-        }
-        return left
-    }
-
-    private fun primary(): TwistMlExpr = when (val token = next()) {
-        "(" -> expression().also { expect(")") }
-        "load" -> callOne(TwistMlExpr::Load)
-        "store" -> {
-            expect("(")
-            val key = expression()
-            expect(",")
-            TwistMlExpr.Store(key, expression()).also { expect(")") }
-        }
-        "caller" -> TwistMlExpr.Caller
-        "callvalue" -> TwistMlExpr.CallValue
-        else -> token.toBigIntegerOrNull()?.let(TwistMlExpr::Number) ?: TwistMlExpr.Variable(token)
-    }
-
-    private fun callOne(build: (TwistMlExpr) -> TwistMlExpr): TwistMlExpr {
-        expect("(")
-        return build(expression()).also { expect(")") }
-    }
-
-    private fun precedence(token: String?): Int = when (token) {
-        "||" -> 1
-        "&&" -> 2
-        "=", "==", "<", ">" -> 3
-        "+", "-" -> 4
-        "*", "/", "%" -> 5
-        else -> -1
-    }
-
-    private fun identifier(): String = next().also { require(it.matches(Regex("[A-Za-z_][A-Za-z0-9_]*"))) }
-    private fun peek(): String? = tokens.getOrNull(position)
-    private fun next(): String = peek()?.also { position++ } ?: error("Unexpected end of source")
-    private fun expect(value: String) = require(next() == value) { "Expected $value" }
-    private fun takeIf(value: String): Boolean = (peek() == value).also { if (it) position++ }
-}

app/src/main/kotlin/rip/crit/twist/standards/PersistentToken.kt

@@ -24,13 +24,5 @@ class PersistentToken(override val symbol: String, private val store: KeyValueSt
             store.put(key(to), (balanceOf(to).value + amount.value).toByteArray())
         }
 
-    fun burn(from: Address, amount: Amount): Boolean =
-        synchronized(this) {
-            val balance = balanceOf(from).value
-            if (amount.value.signum() <= 0 || balance < amount.value) return false
-            store.put(key(from), (balance - amount.value).toByteArray())
-            true
-        }
-
     private fun key(owner: Address) = "$symbol:${owner.value}".encodeToByteArray()
 }

app/src/main/kotlin/rip/crit/twist/twisto/TwistoToken.kt

@@ -18,8 +18,6 @@ data class TwistoMetadata(
     val name: String = "Twisto",
     val symbol: String = "TWISTO",
     val description: String,
-    val decimals: Int = 18,
-    val maxSupply: String? = null,
     val image: String? = null,
     val externalUrl: String? = null,
     val issuerDid: String? = null,
@@ -30,8 +28,6 @@ data class TwistoMetadata(
         require(name.isNotBlank() && name.length <= 128)
         require(symbol.matches(Regex("[A-Z0-9]{2,12}")))
         require(description.length <= 4_096)
-        require(decimals in 0..36)
-        require(maxSupply == null || (maxSupply.toBigIntegerOrNull()?.signum() ?: -1) >= 0)
         require(
             attributes.size <= 64 &&
                 attributes.all { it.key.length <= 64 && it.value.length <= 512 }
@@ -48,10 +44,6 @@ data class TwistoMetadata(
         append(symbol.escape())
         append("\",\"description\":\"")
         append(description.escape())
-        append("\",\"decimals\":")
-        append(decimals)
-        append(",\"maxSupply\":")
-        appendJson(maxSupply)
         append("\",\"image\":")
         appendJson(image)
         append(",\"externalUrl\":")
@@ -90,14 +82,9 @@ class TwistoToken(
         synchronized(this) {
             check(state.get(DEPLOYED) == null) { "Twisto is already deployed" }
             require(metadata.symbol == SYMBOL)
-            val cap = metadata.maxSupply?.let(::BigInteger)
-            require(cap == null || initialSupply.value <= cap) { "Initial supply exceeds cap" }
             val pointer = content.put(metadata.encode())
             state.put(METADATA, pointer.value.encodeToByteArray())
             state.put(SUPPLY, initialSupply.value.toByteArray())
-            cap?.let { state.put(CAP, it.toByteArray()) }
-            state.put(PAUSED, byteArrayOf(0))
-            state.put(OWNER, owner.value.encodeToByteArray())
             state.put(DEPLOYED, byteArrayOf(1))
             if (initialSupply.value.signum() > 0) token.mint(owner, initialSupply)
             pointer
@@ -109,19 +96,11 @@ class TwistoToken(
 
     fun totalSupply(): Amount = Amount(state.get(SUPPLY)?.let(::BigInteger) ?: BigInteger.ZERO)
 
-    fun cap(): Amount? = state.get(CAP)?.let { Amount(BigInteger(it)) }
-
-    fun paused(): Boolean = state.get(PAUSED)?.firstOrNull() == 1.toByte()
-
     fun mint(caller: Address, recipient: Address, amount: Amount) =
         synchronized(this) {
             require(caller == owner) { "Only the owner may mint" }
             check(state.get(DEPLOYED) != null) { "Twisto is not deployed" }
-            check(!paused()) { "Twisto transfers are paused" }
             require(amount.value.signum() > 0)
-            require(cap()?.value?.let { totalSupply().value + amount.value <= it } ?: true) {
-                "Mint exceeds cap"
-            }
             token.mint(recipient, amount)
             state.put(SUPPLY, (totalSupply().value + amount.value).toByteArray())
         }
@@ -129,50 +108,7 @@ class TwistoToken(
     override fun balanceOf(owner: Address): Amount = token.balanceOf(owner)
 
     override fun transfer(from: Address, to: Address, amount: Amount): Boolean =
-        synchronized(this) {
-            check(state.get(DEPLOYED) != null) { "Twisto is not deployed" }
-            check(!paused()) { "Twisto transfers are paused" }
         token.transfer(from, to, amount)
-        }
-
-    fun burn(caller: Address, amount: Amount): Boolean =
-        synchronized(this) {
-            check(!paused()) { "Twisto transfers are paused" }
-            if (!token.burn(caller, amount)) return false
-            state.put(SUPPLY, (totalSupply().value - amount.value).toByteArray())
-            true
-        }
-
-    fun approve(owner: Address, spender: Address, amount: Amount) =
-        synchronized(this) {
-            check(!paused()) { "Twisto transfers are paused" }
-            require(amount.value.signum() >= 0)
-            state.put(allowanceKey(owner, spender), amount.value.toByteArray())
-        }
-
-    fun allowance(owner: Address, spender: Address): Amount =
-        Amount(state.get(allowanceKey(owner, spender))?.let(::BigInteger) ?: BigInteger.ZERO)
-
-    fun transferFrom(spender: Address, from: Address, to: Address, amount: Amount): Boolean =
-        synchronized(this) {
-            check(!paused()) { "Twisto transfers are paused" }
-            val approved = allowance(from, spender).value
-            if (amount.value.signum() <= 0 || approved < amount.value || !token.transfer(from, to, amount)) return false
-            state.put(allowanceKey(from, spender), (approved - amount.value).toByteArray())
-            true
-        }
-
-    fun pause(caller: Address) = requireOwner(caller) { state.put(PAUSED, byteArrayOf(1)) }
-
-    fun unpause(caller: Address) = requireOwner(caller) { state.put(PAUSED, byteArrayOf(0)) }
-
-    fun transferOwnership(caller: Address, nextOwner: Address) =
-        requireOwner(caller) {
-            require(nextOwner.value.isNotBlank())
-            state.put(OWNER, nextOwner.value.encodeToByteArray())
-        }
-
-    fun owner(): Address = state.get(OWNER)?.decodeToString()?.let(::Address) ?: owner
 
     fun contractIr(): ContractIr =
         contract("Twisto") {
@@ -191,22 +127,6 @@ class TwistoToken(
                 storageLoad()
                 returnWord()
             }
-            function("approve", 4) {
-                storageStore()
-                returnWord()
-            }
-            function("transferFrom", 5) {
-                storageStore()
-                returnWord()
-            }
-            function("burn", 6) {
-                storageStore()
-                returnWord()
-            }
-            function("pause", 7) {
-                storageStore()
-                returnWord()
-            }
         }
 
     private companion object {
@@ -214,15 +134,5 @@ class TwistoToken(
         val DEPLOYED = "twisto:deployed".encodeToByteArray()
         val METADATA = "twisto:metadata".encodeToByteArray()
         val SUPPLY = "twisto:supply".encodeToByteArray()
-        val CAP = "twisto:cap".encodeToByteArray()
-        val PAUSED = "twisto:paused".encodeToByteArray()
-        val OWNER = "twisto:owner".encodeToByteArray()
-        fun allowanceKey(owner: Address, spender: Address) =
-            "twisto:allowance:${owner.value}:${spender.value}".encodeToByteArray()
-    }
-
-    private inline fun requireOwner(caller: Address, action: () -> Unit) = synchronized(this) {
-        require(caller == owner()) { "Only the owner may perform this action" }
-        action()
     }
 }

app/src/test/kotlin/rip/crit/twist/AppTest.kt

@@ -5,7 +5,6 @@ import rip.crit.twist.bips.FileStorageContract
 import rip.crit.twist.bytecode.TwistBytecode
 import rip.crit.twist.compiler.TwistCompiler
 import rip.crit.twist.compiler.LispIrCompiler
-import rip.crit.twist.compiler.TwistMlCompiler
 import rip.crit.twist.compiler.contract
 import rip.crit.twist.core.Address
 import rip.crit.twist.core.Amount
@@ -45,8 +44,6 @@ import rip.crit.twist.tvm.Calldata
 import rip.crit.twist.tvm.TransientStorage
 import rip.crit.twist.tvm.Word256
 import rip.crit.twist.tvm.BytecodeVirtualMachine
-import rip.crit.twist.tvm.ExecutionContext
-import rip.crit.twist.tvm.StateExecutionHost
 import rip.crit.twist.bytecode.Instruction
 import rip.crit.twist.bytecode.OpCode
 import rip.crit.twist.p2p.PeerNetwork
@@ -385,47 +382,6 @@ class AppTest {
         assertFailsWith<IllegalArgumentException> { LispIrCompiler().compile(source, "mallory") }
     }
 
-    @Test
-    fun twistMlLowersFunctionalExpressionsToExecutableBytecode() {
-        val source =
-            """
-            contract Arithmetic {
-              fun max(left, right) = if left > right then left else right;
-              fun stored(key) = let value = load(key) in value + 1;
-            }
-            """.trimIndent()
-        val contract = TwistMlCompiler().compile(source)
-        assertEquals(listOf("max", "stored"), contract.functions.map { it.name })
-        val input =
-            Word256.fromLong(1).toBytes() +
-                Word256.fromLong(3).toBytes() +
-                Word256.fromLong(7).toBytes()
-        val result = BytecodeVirtualMachine().execute(contract.bytecode(), input, Address("ml"))
-        assertTrue(result.success)
-        assertEquals(BigInteger.valueOf(7), Word256.fromBytes(result.output).toBigInteger())
-    }
-
-    @Test
-    fun twistoTwistMlContractInitializesAndTransfersOnTheVm() {
-        val contract = TwistMlCompiler().compile(Files.readString(Path.of("protocols/tokens/twisto.twml")))
-        val code = contract.bytecode()
-        val state = InMemoryWorldState()
-        val address = Address("twisto")
-        val owner = Address("owner")
-        fun call(caller: Address, selector: Long, vararg arguments: Word256) =
-            BytecodeVirtualMachine().execute(
-                code,
-                Word256.fromLong(selector).toBytes() + arguments.fold(byteArrayOf()) { bytes, word -> bytes + word.toBytes() },
-                StateExecutionHost(ExecutionContext(address, caller, Amount(BigInteger.ZERO)), state),
-            )
-        assertTrue(call(owner, 1, Word256.fromLong(99), Word256.fromLong(10), Word256.fromLong(10)).success)
-        val recipient = Word256.fromBytes(Sha256.bytes("recipient".encodeToByteArray()))
-        assertTrue(call(owner, 6, recipient, Word256.fromLong(4)).success)
-        val ownerKey = Word256.fromBytes(Sha256.bytes(owner.value.encodeToByteArray()))
-        assertEquals(BigInteger.valueOf(6), Word256.fromBytes(call(owner, 5, ownerKey).output).toBigInteger())
-        assertEquals(BigInteger.valueOf(4), Word256.fromBytes(call(owner, 5, recipient).output).toBigInteger())
-    }
-
     @Test
     fun didMethodsResolveDocuments() {
         val publicKey = ByteArray(32) { it.toByte() }
@@ -504,25 +460,6 @@ class AppTest {
         }
     }
 
-    @Test
-    fun twistoSupportsAllowancesBurningPausesAndSupplyCaps() {
-        val owner = Address("owner")
-        val alice = Address("alice")
-        val bob = Address("bob")
-        val token = TwistoToken(owner, InMemoryKeyValueStore(), FileStorageContract(Files.createTempDirectory("twisto-token")))
-        token.deploy(TwistoMetadata(description = "Capped", maxSupply = "20"), Amount(BigInteger.TEN))
-        token.approve(owner, alice, Amount(BigInteger.valueOf(4)))
-        assertTrue(token.transferFrom(alice, owner, bob, Amount(BigInteger.valueOf(4))))
-        assertEquals(BigInteger.ZERO, token.allowance(owner, alice).value)
-        assertTrue(token.burn(bob, Amount(BigInteger.ONE)))
-        assertEquals(BigInteger.valueOf(9), token.totalSupply().value)
-        token.pause(owner)
-        assertFailsWith<IllegalStateException> { token.transfer(owner, bob, Amount(BigInteger.ONE)) }
-        token.unpause(owner)
-        token.mint(owner, owner, Amount(BigInteger.valueOf(11)))
-        assertFailsWith<IllegalArgumentException> { token.mint(owner, owner, Amount(BigInteger.ONE)) }
-    }
-
     private fun hex(value: String): ByteArray = value.chunked(2).map { it.toInt(16).toByte() }.toByteArray()
     private fun ByteArray.hex(): String = joinToString("") { "%02x".format(it) }
 }

apps/compiler/src/main/kotlin/rip/crit/twist/tool/compiler/Main.kt

@@ -4,18 +4,15 @@ import java.nio.file.Files
 import java.nio.file.Path
 import rip.crit.twist.compiler.TwistCompiler
 import rip.crit.twist.compiler.LispIrCompiler
-import rip.crit.twist.compiler.TwistMlCompiler
 
 fun main(args: Array<String>) {
     require(args.size in 2..3) {
-        "Usage is twistc <source.twistasm|source.twistl|source.twml> <output.tbc> [principal]"
+        "Usage is twistc <source.twistasm|source.twistl> <output.tbc> [principal]"
     }
     val source = Path.of(args[0])
     val text = Files.readString(source)
     val bytecode =
-        if (source.fileName.toString().endsWith(".twml")) {
+        if (source.fileName.toString().endsWith(".twistl")) {
-            TwistMlCompiler().compile(text).bytecode()
-        } else if (source.fileName.toString().endsWith(".twistl")) {
             LispIrCompiler().compile(text, args.getOrNull(2) ?: "anonymous")
         } else {
             TwistCompiler().compile(text)

apps/twisto/src/main/kotlin/rip/crit/twist/tool/twisto/Main.kt

@@ -1,31 +1,31 @@
 package rip.crit.twist.tool.twisto
 
 import java.math.BigInteger
-import java.nio.file.Files
 import java.nio.file.Path
 import rip.crit.twist.bips.FileStorageContract
-import rip.crit.twist.compiler.TwistMlCompiler
+import rip.crit.twist.core.Address
+import rip.crit.twist.core.Amount
+import rip.crit.twist.store.FileKeyValueStore
 import rip.crit.twist.twisto.TwistoMetadata
-import rip.crit.twist.tvm.Word256
+import rip.crit.twist.twisto.TwistoToken
 
 fun main(args: Array<String>) {
     require(args.size in 1..3) {
-        "Usage is twisto <data-folder> [owner-label] [initial-supply]"
+        "Usage is twisto <data-folder> [owner] [initial-supply]"
     }
     val root = Path.of(args[0])
-    val owner = args.getOrNull(1) ?: "twisto-owner"
+    val owner = Address(args.getOrNull(1) ?: "twisto-owner")
-    val supply = BigInteger(args.getOrNull(2) ?: "1000000")
+    val token =
-    val metadata = FileStorageContract(root.resolve("metadata"))
+        TwistoToken(
-    val pointer = metadata.put(TwistoMetadata(description = "Named token on the Twist network").encode())
+            owner,
-    val source = checkNotNull(object {}.javaClass.getResource("/twisto.twml")) { "Missing Twisto contract source" }.readText()
+            FileKeyValueStore(root.resolve("state")),
-    val code = TwistMlCompiler().compile(source).bytecode()
+            FileStorageContract(root.resolve("metadata")),
-    Files.createDirectories(root)
+        )
-    Files.write(root.resolve("twisto.tbc"), code)
+    val pointer =
-    val initialization =
+        token.metadataPointer()
-        Word256.fromLong(1).toBytes() +
+            ?: token.deploy(
-            Word256.fromBytes(pointer.value.chunked(2).map { it.toInt(16).toByte() }.toByteArray()).toBytes() +
+                TwistoMetadata(description = "Named token on the Twist network"),
-            Word256.of(supply).toBytes() +
+                Amount(BigInteger(args.getOrNull(2) ?: "1000000")),
-            Word256.of(supply).toBytes()
+            )
-    Files.write(root.resolve("initialize.calldata"), initialization)
+    println("deployed symbol=${token.symbol} metadata=${pointer.value} owner=${owner.value}")
-    println("compiled contract=${root.resolve("twisto.tbc")} metadata=${pointer.value} owner-label=$owner")
 }

apps/twisto/src/main/resources/twisto.twml

@@ -1,10 +0,0 @@
-contract Twisto {
-  fun initialize(metadata, supply, cap) = if load(0) == 0 then let ignored = store(0, caller) in let ignored = store(1, metadata) in let ignored = store(2, cap) in let ignored = store(3, supply) in store(caller, supply) else 0;
-  fun metadata() = load(1);
-  fun total_supply() = load(3);
-  fun cap() = load(2);
-  fun balance_of(account) = load(account);
-  fun transfer(to, amount) = let from = caller in let balance = load(from) in if amount > balance then 0 else let ignored = store(from, balance - amount) in store(to, load(to) + amount);
-  fun mint(to, amount) = let owner = load(0) in let supply = load(3) in let ceiling = load(2) in if caller == owner then if ceiling < supply + amount then 0 else let ignored = store(3, supply + amount) in store(to, load(to) + amount) else 0;
-  fun burn(amount) = let account = caller in let balance = load(account) in let supply = load(3) in if amount > balance then 0 else let ignored = store(account, balance - amount) in store(3, supply - amount);
-}

protocols/tokens/twisto.twml

@@ -1,40 +0,0 @@
-contract Twisto {
-  fun initialize(metadata, supply, cap) =
-    if load(0) == 0 then
-      let ignored = store(0, caller) in
-      let ignored = store(1, metadata) in
-      let ignored = store(2, cap) in
-      let ignored = store(3, supply) in
-      store(caller, supply)
-    else 0;
-
-  fun metadata() = load(1);
-  fun total_supply() = load(3);
-  fun cap() = load(2);
-  fun balance_of(account) = load(account);
-
-  fun transfer(to, amount) =
-    let from = caller in
-    let balance = load(from) in
-    if amount > balance then 0 else
-      let ignored = store(from, balance - amount) in
-      store(to, load(to) + amount);
-
-  fun mint(to, amount) =
-    let owner = load(0) in
-    let supply = load(3) in
-    let ceiling = load(2) in
-    if caller == owner then
-      if ceiling < supply + amount then 0 else
-        let ignored = store(3, supply + amount) in
-        store(to, load(to) + amount)
-    else 0;
-
-  fun burn(amount) =
-    let account = caller in
-    let balance = load(account) in
-    let supply = load(3) in
-    if amount > balance then 0 else
-      let ignored = store(account, balance - amount) in
-      store(3, supply - amount);
-}