Transferring an asset
So now, let’s imagine I sent you some BlockchainProgramming Coins.
How can you send me back the coins?
You need to build a ColoredCoin.
In the sample above, let’s say I want to spend the 10 assets I received on the address “nico”.
Here is the coin I want to spend:
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{
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"transactionId": "fa6db7a2e478f3a8a0d1a77456ca5c9fa593e49fd0cf65c7e349e5a4cbe58842",
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"index": 0,
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"value": 600,
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"scriptPubKey": "76a914356facdac5f5bcae995d13e667bb5864fd1e7d5988ac",
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"redeemScript": null,
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"assetId": "AVAVfLSb1KZf9tJzrUVpktjxKUXGxUTD4e",
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"quantity": 10
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}
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Here is how to instantiate such Colored Coin in code:
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var coin = new Coin(
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fromTxHash: new uint256("fa6db7a2e478f3a8a0d1a77456ca5c9fa593e49fd0cf65c7e349e5a4cbe58842"),
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fromOutputIndex: 0,
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amount: Money.Satoshis(600),
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scriptPubKey: new Script(Encoders.Hex.DecodeData("76a914356facdac5f5bcae995d13e667bb5864fd1e7d5988ac")));
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BitcoinAssetId assetId = new BitcoinAssetId("AVAVfLSb1KZf9tJzrUVpktjxKUXGxUTD4e");
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ColoredCoin colored = coin.ToColoredCoin(assetId, 10);
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We will show you later how you can use some web services or custom code to get the coins more easily.
I also needed another coin (forFees), to pay the fees.
The asset transfer is actually very easy with the TransactionBuilder.
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var book = BitcoinAddress.Create("1KF8kUVHK42XzgcmJF4Lxz4wcL5WDL97PB");
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var nicoSecret = new BitcoinSecret("??????????", Network.Mainnet);
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var nico = nicoSecret.GetAddress(); //15sYbVpRh6dyWycZMwPdxJWD4xbfxReeHe
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var forFees = new Coin(
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fromTxHash: new uint256("7f296e96ec3525511b836ace0377a9fbb723a47bdfb07c6bc3a6f2a0c23eba26"),
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fromOutputIndex: 0,
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amount: Money.Satoshis(4425000),
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scriptPubKey: new Script(Encoders.Hex.DecodeData("76a914356facdac5f5bcae995d13e667bb5864fd1e7d5988ac")));
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var builder = Network.Main.CreateTransactionBuilder();
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var tx = builder
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.AddKeys(nicoSecret)
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.AddCoins(colored, forFees)
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.SendAsset(book, new AssetMoney(assetId, 10))
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.SetChange(nico)
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.SendFees(Money.Coins(0.0001m))
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.BuildTransaction(true);
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Console.WriteLine(tx);
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{
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….
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"out": [
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{
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"value": "0.00000000",
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"scriptPubKey": "OP_RETURN 4f410100010a00"
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},
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{
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"value": "0.00000600",
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"scriptPubKey": "OP_DUP OP_HASH160 c81e8e7b7ffca043b088a992795b15887c961592 OP_EQUALVERIFY OP_CHECKSIG"
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},
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{
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"value": "0.04415000",
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"scriptPubKey": "OP_DUP OP_HASH160 356facdac5f5bcae995d13e667bb5864fd1e7d59 OP_EQUALVERIFY OP_CHECKSIG"
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}
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]
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}
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Which basically succeed:
Last modified 2yr ago
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