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Erik Zhang
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Jul 6, 2017
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,252 @@ | ||
| //public static bool Main(byte[] agent, byte[] assetId, byte[] valueId, byte[] client, bool way, BigInteger price, byte[] signature) | ||
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| //if (VerifySignature(client, signature)) return true; | ||
| PUSH 6 | ||
| PICK | ||
| PUSH 4 | ||
| ROLL | ||
| CHECKSIG | ||
| JMPIFNOT S01 | ||
| PUSH true | ||
| TOALTSTACK | ||
| JMP CLEAR | ||
|
|
||
| //if (!VerifySignature(agent, signature)) return false; | ||
| S01: | ||
| PUSH 5 | ||
| ROLL | ||
| SWAP | ||
| CHECKSIG | ||
| JMPIF S02 | ||
| PUSH false | ||
| TOALTSTACK | ||
| JMP CLEAR | ||
|
|
||
| //set inputId and outputId | ||
| S02: | ||
| PUSH 2 | ||
| PICK | ||
| JMPIF S03 | ||
| SWAP | ||
|
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| //BigInteger inputSum = 0, outputSum = 0; | ||
| S03: | ||
| PUSH 0 | ||
| PUSH 0 | ||
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| //TransactionOutput[] references = ((Transaction)ExecutionEngine.ScriptContainer).GetReferences(); | ||
| SYSCALL System.ExecutionEngine.GetScriptContainer | ||
| SYSCALL AntShares.Transaction.GetReferences | ||
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| //foreach (TransactionOutput reference in references) | ||
| //{ | ||
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| //initialize loop | ||
| DUP | ||
| ARRAYSIZE | ||
| PUSH 0 | ||
|
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||
| //exit test | ||
| LOOP1: | ||
| OVER | ||
| OVER | ||
| NUMEQUAL | ||
| JMPIF S04 | ||
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||
| //set reference | ||
| PUSH 2 | ||
| PICK | ||
| OVER | ||
| PICKITEM | ||
|
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||
| //if (reference.ScriptHash.Equals(ExecutionEngine.EntryScriptHash)) | ||
| //{ | ||
| DUP | ||
| SYSCALL AntShares.Output.GetScriptHash | ||
| SYSCALL System.ExecutionEngine.GetEntryScriptHash | ||
| EQUAL | ||
| JMPIFNOT LOOP1S1 | ||
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| //if (!reference.AssetId.Equals(inputId)) | ||
| DUP | ||
| SYSCALL AntShares.Output.GetAssetId | ||
| PUSH 7 | ||
| PICK | ||
| EQUAL | ||
| JMPIF LOOP1S2 | ||
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| //return false; | ||
| PUSH false | ||
| TOALTSTACK | ||
| JMP CLEAR | ||
|
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| //else | ||
| LOOP1S2: | ||
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| //inputSum += reference.Value; | ||
| DUP | ||
| SYSCALL AntShares.Output.GetValue | ||
| PUSH 5 | ||
| PICK | ||
| ADD | ||
| PUSH 5 | ||
| XSWAP | ||
| DROP | ||
| //} | ||
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| LOOP1S1: | ||
| DROP | ||
| INC | ||
| JMP LOOP1 | ||
| S04: | ||
| DROP | ||
| DROP | ||
| DROP | ||
| //} | ||
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| //TransactionOutput[] outputs = ((Transaction)ExecutionEngine.ScriptContainer).GetOutputs(); | ||
| SYSCALL System.ExecutionEngine.GetScriptContainer | ||
| SYSCALL AntShares.Transaction.GetOutputs | ||
|
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| //foreach (TransactionOutput output in outputs) | ||
| //{ | ||
|
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| //initialize loop | ||
| DUP | ||
| ARRAYSIZE | ||
| PUSH 0 | ||
|
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| //exit test | ||
| LOOP2: | ||
| OVER | ||
| OVER | ||
| NUMEQUAL | ||
| JMPIF S05 | ||
|
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| //set output | ||
| PUSH 2 | ||
| PICK | ||
| OVER | ||
| PICKITEM | ||
|
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||
| //if (output.ScriptHash.Equals(ExecutionEngine.EntryScriptHash)) | ||
| //{ | ||
| DUP | ||
| SYSCALL AntShares.Output.GetScriptHash | ||
| SYSCALL System.ExecutionEngine.GetEntryScriptHash | ||
| EQUAL | ||
| JMPIFNOT LOOP2S1 | ||
|
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| //if (output.AssetId.Equals(inputId)) | ||
| DUP | ||
| SYSCALL AntShares.Output.GetAssetId | ||
| PUSH 7 | ||
| PICK | ||
| EQUAL | ||
| JMPIFNOT LOOP2S2 | ||
|
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| //inputSum -= output.Value; | ||
| PUSH 4 | ||
| PICK | ||
| OVER | ||
| SYSCALL AntShares.Output.GetValue | ||
| SUB | ||
| PUSH 5 | ||
| XSWAP | ||
| DROP | ||
| JMP LOOP2S1 | ||
|
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| //else if (output.AssetId.Equals(outputId)) | ||
| LOOP2S2: | ||
| DUP | ||
| SYSCALL AntShares.Output.GetAssetId | ||
| PUSH 8 | ||
| PICK | ||
| EQUAL | ||
| JMPIFNOT LOOP2S1 | ||
|
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||
| //outputSum += output.Value; | ||
| PUSH 5 | ||
| PICK | ||
| OVER | ||
| SYSCALL AntShares.Output.GetValue | ||
| ADD | ||
| PUSH 6 | ||
| XSWAP | ||
| DROP | ||
| //} | ||
|
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||
| LOOP2S1: | ||
| DROP | ||
| INC | ||
| JMP LOOP2 | ||
| S05: | ||
| DROP | ||
| DROP | ||
| DROP | ||
| //} | ||
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| //if (inputSum <= 0) return true; | ||
| DUP | ||
| PUSH 0 | ||
| LTE | ||
| JMPIFNOT S06 | ||
| PUSH true | ||
| TOALTSTACK | ||
| JMP CLEAR | ||
|
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| //if (way) | ||
| //{ | ||
| S06: | ||
| PUSH 4 | ||
| ROLL | ||
| JMPIFNOT S07 | ||
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| //if (outputSum * 100000000 < inputSum * price) return false; | ||
| PUSH 4 | ||
| ROLL | ||
| MUL | ||
| SWAP | ||
| PUSH 100000000 | ||
| MUL | ||
| GT | ||
| JMPIFNOT S08 | ||
| PUSH false | ||
| TOALTSTACK | ||
| JMP CLEAR | ||
| //} | ||
|
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| //else | ||
| //{ | ||
| S07: | ||
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| //if (inputSum * 100000000 > outputSum * price) return false; | ||
| PUSH 100000000 | ||
| MUL | ||
| SWAP | ||
| PUSH 4 | ||
| ROLL | ||
| MUL | ||
| GT | ||
| JMPIFNOT S08 | ||
| PUSH false | ||
| TOALTSTACK | ||
| JMP CLEAR | ||
| //} | ||
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| //return true; | ||
| S08: | ||
| DROP | ||
| DROP | ||
| PUSH true | ||
| RET | ||
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| //clear stack and return | ||
| CLEAR: | ||
| DEPTH | ||
| JMPIFNOT EXIT | ||
| DROP | ||
| JMP CLEAR | ||
| EXIT: | ||
| FROMALTSTACK | ||
| RET |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,4 +1,4 @@ | ||
| <?xml version="1.0" encoding="utf-8"?> | ||
| <packages> | ||
| <package id="AntShares.SmartContract.Framework" version="2.0.0" targetFramework="net462" /> | ||
| <package id="AntShares.SmartContract.Framework" version="2.0.0.4" targetFramework="net462" /> | ||
| </packages> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| using AntShares.SmartContract.Framework; | ||
| using AntShares.SmartContract.Framework.Services.AntShares; | ||
| using AntShares.SmartContract.Framework.Services.System; | ||
| using System.Numerics; | ||
|
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| namespace AntShares.SmartContract | ||
| { | ||
| public class ContractAsset : FunctionCode | ||
| { | ||
| public static object Main(string operation, params object[] args) | ||
| { | ||
| switch (operation) | ||
| { | ||
| case "create": | ||
| return Create((string)args[0], (BigInteger)args[1], (byte[])args[2]); | ||
| case "transfer": | ||
| return Transfer((byte[])args[0], (byte[])args[1], (BigInteger)args[2]); | ||
| default: | ||
| return false; | ||
| } | ||
| } | ||
|
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| public static byte[] Create(string name, BigInteger amount, byte[] owner) | ||
| { | ||
| Contract contract = Blockchain.GetContract(ExecutionEngine.ExecutingScriptHash); | ||
| byte[] script = contract.Script.Concat(name.AsByteArray()); | ||
| contract = Contract.Create(script, new byte[] { 5, 16 }, 5, true, name, "1.0.0-preview1", owner.AsString(), "", name); | ||
| Storage.Put(contract.StorageContext, owner, amount.ToByteArray()); | ||
| return Hash160(contract.Script); | ||
| } | ||
|
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| public static bool Transfer(byte[] from, byte[] to, BigInteger value) | ||
| { | ||
| if (value <= 0) return false; | ||
| if (from.Length != 33 || to.Length != 33) return false; | ||
| if (!Runtime.CheckWitness(from)) return false; | ||
| byte[] data = Storage.Get(Storage.CurrentContext, from); | ||
| if (data == null) return false; | ||
| BigInteger available = new BigInteger(data); | ||
| if (available < value) return false; | ||
| available -= value; | ||
| Storage.Put(Storage.CurrentContext, from, available.ToByteArray()); | ||
| data = Storage.Get(Storage.CurrentContext, to); | ||
| if (data == null) | ||
| available = 0; | ||
| else | ||
| available = new BigInteger(data); | ||
| available += value; | ||
| Storage.Put(Storage.CurrentContext, to, available.ToByteArray()); | ||
| return true; | ||
| } | ||
| } | ||
| } |
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