Les Sidechains Horizen : ma première sidechain

On reprend la présentation des sidechains Horizen. Dans cet épisode on s’intéresse à la création de notre première sidechain, grâce aux outils du Sidechains-SDK Horizen.

Le plan du dossier : Les Sidechains Horizen

  1. Zend_oo, le node de la MainChain Horizen
  2. Création de ma première sidechain : Tu es ici 🙂
  3. Transferts de ZEN entre chaînes
  4. Bonus : Gagner des ZEN : Le Faucet en détail
  5. Bonus : Monter un secure node ZEN en 20 minutes

Installation Java8, Maven & Scala

Je commence par me reconnecter à l’environnement mis en place lors du premier épisode. Pour rappel, on doit se connecter en tant qu’utilisateur zendoo.

Il y a tout d’abord quelques prérequis à installer.

$ sudo apt-get update
$ sudo apt-get install -y software-properties-common
$ wget -qO - https://adoptopenjdk.jfrog.io/adoptopenjdk/api/gpg/key/public | sudo apt-key add -
$ sudo add-apt-repository --yes https://adoptopenjdk.jfrog.io/adoptopenjdk/deb/
$ sudo apt-get update
$ sudo apt-get install adoptopenjdk-8-hotspot
$ sudo apt-get install maven

Je vérifie que tout s’est bien déroulé et que je dispose bien de Java8 et Maven :

$ java -version
openjdk version "1.8.0_252"
OpenJDK Runtime Environment (AdoptOpenJDK)(build 1.8.0_252-b09)
OpenJDK 64-Bit Server VM (AdoptOpenJDK)(build 25.252-b09, mixed mode)

$ mvn --version
Apache Maven 3.6.0
Maven home: /usr/share/maven
Java version: 1.8.0_252, vendor: AdoptOpenJDK, runtime: /usr/lib/jvm/adoptopenjdk-8-hotspot-amd64/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "4.19.0-8-cloud-amd64", arch: "amd64", family: "unix"

J’installe Scala-sbt en complément :

$ echo "deb https://dl.bintray.com/sbt/debian /" | sudo tee -a /etc/apt/sources.list.d/sbt.list
$ curl -sL "https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x2EE0EA64E40A89B84B2DF73499E82A75642AC823" | sudo apt-key add
$ sudo apt-get update
$ sudo apt-get install sbt

Je teste dans un répertoire temporaire :

$ mkdir sbttest
$ cd sbttest
$ sbt

Une fois dans sbt (le premier lancement peut être assez long), je vérifie la version (about) puis je quitte (exit) :

sbt:sbttest> about
[info] This is sbt 1.3.13
[info] The current project is ProjectRef(uri("file:/home/zendoo/sbttest/"), "sbttest") 0.1.0-SNAPSHOT
[info] The current project is built against Scala 2.12.10
[info] Available Plugins
[info]  - sbt.ScriptedPlugin
[info]  - sbt.plugins.CorePlugin
[info]  - sbt.plugins.Giter8TemplatePlugin
[info]  - sbt.plugins.IvyPlugin
[info]  - sbt.plugins.JUnitXmlReportPlugin
[info]  - sbt.plugins.JvmPlugin
[info]  - sbt.plugins.SbtPlugin
[info]  - sbt.plugins.SemanticdbPlugin
[info] sbt, sbt plugins, and build definitions are using Scala 2.12.10
sbt:sbttest> exit
[info] shutting down sbt server

Je peux alors quitter et supprimer le répertoire sbttest :

$ cd ..
$ rm -rf sbttest/

Compilation des éléments du Sidechains-SDK

Je commence par récupérer le Sidechains-SDK, je me place dans le répertoire ainsi créé et je lance la compilation :

$ git clone https://github.com/ZencashOfficial/Sidechains-SDK.git
$ cd Sidechains-SDK
$ mvn package 

Si Maven rapporte une erreur disant qu’il ne trouve pas /usr/lib/jvm/adoptopenjdk-8-hotspot-amd64/jre/bin/javac, c’est qu’il ne cherche pas au bon endroit (dans le sous répertoire jre au lieu du répertoire du JDK qui est un étage plus haut). Il faut corriger ça en forçant la variable d’environnement JAVA_HOME et relancer :

$ export JAVA_HOME=/usr/lib/jvm/adoptopenjdk-8-hotspot-amd64/
$ mvn package

Cette commande va construire les 4 élements du SDK :

  • Le coeur du SDK lui même
  • Les Bootstraping tools, des outils facilitant la création de la configuration d’une sidechain.
  • SimpleApp un exécutable permettant de faire tourner un node d’une sidechain par défaut.
  • Qa : Le sidechain test framework

En théorie, tout doit bien se passer, c’est beaucoup plus rapide que la compilation de Zend_oo et on termine sur un résumé :

[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for Sidechains 0.2.1:
[INFO]
[INFO] Sidechains-SDK ..................................... SUCCESS [06:15 min]
[INFO] Sidechains-SDK-simpleapp ........................... SUCCESS [  9.294 s]
[INFO] Sidechains-SDK-ScBootstrappingTools ................ SUCCESS [ 18.948 s]
[INFO] Sidechains ......................................... SUCCESS [  0.011 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  06:44 min
[INFO] Finished at: 2020-07-15T22:49:29Z
[INFO] ------------------------------------------------------------------------
281ccbe9cfe0fdbcaa48c2c1788cd3a3.png

Obtention des données préliminaires !

Allez, c’est parti, je vais pouvoir m’attaquer à la configuration et au lancement de ma sidechain !

Je vais pour cela utiliser l’outil de Bootstrapping, en étant toujours dans le répertoire Sidechains-SDK :

$ java -jar tools/sctool/target/Sidechains-SDK-ScBootstrappingTools-0.2.1.jar
Tool successfully started...
Please, enter the command:

Cet outil permet de saisir des commandes et leurs arguments au format JSON. Les réponses sont également au format JSON.

Il me faut 2 paires de clés pour initialiser ma sidechain. Et des chaînes aléatoires pour initialiser le générateur de nombres aléatoires lui même lors de chaque appel.

Générer une valeur d’initialisation de générateur de nombres aléatoires est un challenge à lui tout seul. Pour l’exemple, on se contentera de chaînes de 32 caractères créées à l’aide d’un générateur de mot de passe : "ijsj3J00NyPzcOjnkoNYDsgzuHAfiIrI" pour la première paire, "47w0u4exA70266o80w54zv537gps5O4F" pour la seconde et "72S8h385u0327kuO7h0392LL1i0Geo2v" pour la dernière.

Attention à bien conserver toutes les réponses de l’outil dans un fichier texte pour la suite des opérations.

Je commence par ces deux paires de clés (ed25519 puis Vrf) :

generatekey {"seed":"ijsj3J00NyPzcOjnkoNYDsgzuHAfiIrI"}

Réponse obtenue (une fois remise en forme). A noter, la publicKey sera la première adresse de mon wallet sur la sidechain :

{
    "secret":"00531e40d4036d808d2101756debc7fd2365cd76da1176f5bf2ed09603d01f711ca03bee9112b03f060a26469b0ba23d87c38dda964cf9a1bb3c7f1edbf8a2d6f8",
    "publicKey":"a03bee9112b03f060a26469b0ba23d87c38dda964cf9a1bb3c7f1edbf8a2d6f8"
}

Je procède de même pour la clé Vrf (attention, la commande n’est pas la même)

generateVrfKey {"seed":"47w0u4exA70266o80w54zv537gps5O4F"}

Réponse obtenue (ça doit être plus long que la précédente paire) :

{
    "vrfSecret":"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",
    "vrfPublicKey":"0ed74aa4afda5ffb358ba4906d0a5429f9840805e1fcc9ea71fca62afb5e97d779d0d2d3dd1bd9a3563166eff9d12b9ab9b6f11baf5639606689c72e16e2577ee338229e015697c8d174782b4caa04af9902eca2f3c384c6f558cf685b11010084a8436bbb18f7ccd039c249afa69f868c79939923ee3fc3ec437b998246db5b4907881702641ec6b41fdc6de644087713115fa2548121280fe8ac85fe31387aee6465767d8ba2189fab2ee8bf702beda6af018b4d68f890176bf2ab599e000000"
}

Enfin je dois générer des données pour la validation des transactions entre la sidechain et la mainchain. Je les obtiens grâce à l’appel generateProofInfo. La valeur du paramètre keyCount est fixée à 7 pour l’instant. Pour ce qui est de threshold, il doit être inférieur ou égal à 7. La documentation de SimpleApp utilise 5. Donc, j’ai fait de même. Enfin, j’utilise la dernière des trois valeurs d’initialisations de seed précédemment générée.

generateProofInfo {"seed":"72S8h385u0327kuO7h0392LL1i0Geo2v", "keyCount":7, "threshold":5}

La réponse obtenue :

{
  "threshold":5,
  "genSysConstant":"b1acb36cdc03885d0f8ebeff5f1b7c21e3719f875a733ed58170621852d45dcd51b96d38e2dbb2002b43c44742d02d1c348280112fa2fe282f01a6a2615d0d33d19b03a0f5337c8ef41c2d84e2db25f56eb88bcf2ed76a094801d2fc83160100",
  "verificationKey":"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",
  "schnorrKeys":[
      {
              "schnorrSecret":"04000000600bbacac1017bb3a249a07409a83829df212bc3774069f9f3d758496bf8048d356799c7bd9fdf76369616ffc405c5844ee464ad628345a753a35bc6dfd3839ea7519896e45b2f1b610cc34aea072b5d523fd0e1a95f357d90261783c073f40000328f42588d9df851c2c2a2b11336a5737ba913c0f92177c9d0a854c7564b48da761e53205d30d7f60e21ac382b452cabb7f9274e199a59976b0bd6aaf8f59ac171f6444b9bc594473a20c5a3c89e0d1335ffc8d0ee821c60ebcb1239601d0100dae9144ae4bd8d56638befec496d97eadc590acc2a04b9a210ec475b2505cd6774b1be10353b060c31ae1142b90f436fb5e4e1905814eec8a3e86e0cc5fcff36b686bb92d2f6200ebfc714cfd48db5c1ab3fa77b4747fb60a4f7ae6bd56e000000",
              "schnorrPublicKey":"328f42588d9df851c2c2a2b11336a5737ba913c0f92177c9d0a854c7564b48da761e53205d30d7f60e21ac382b452cabb7f9274e199a59976b0bd6aaf8f59ac171f6444b9bc594473a20c5a3c89e0d1335ffc8d0ee821c60ebcb1239601d0100dae9144ae4bd8d56638befec496d97eadc590acc2a04b9a210ec475b2505cd6774b1be10353b060c31ae1142b90f436fb5e4e1905814eec8a3e86e0cc5fcff36b686bb92d2f6200ebfc714cfd48db5c1ab3fa77b4747fb60a4f7ae6bd56e000000"
        },
        {
            "schnorrSecret":"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",
            "schnorrPublicKey":"a3c8f596cec2583278fcb7b460d0ae3b99283d26a22b599b1bfc41a5bc1a1328540eb64362f688437c553c114291853b2ab752fb6baf172f9a7cbdf7fbdb382445cd4672f313426fa92b071ce840103c6ee1463ff0c94a467bec754829a30000815e97336edbccb9523e80699f5c9ef893b5d51e41a50e757f86fc8aa13751b0f13041814140a98a4768f31917d59dd6af87e66a92a57beb25109bed3a12a6b4a9286746d778da486bec3e5bde2381187f243005011b6ccf05fd7568bf94000000"
        },
        {
            "schnorrSecret":"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",
            "schnorrPublicKey":"c76abd8288ec3b05e947adcf66a4fd91b8bbeae23d07cfe0196abffdc5d187f7c7cda485c00789f10d8c1650569a6fd4485cfa36e6247268e2aba1563beb3e2c8be87eae0df4a85f5057fddfd1f0bceef7998d20a9efcabc9e0a06e2fd7e010042c0738a904595ed5e3d7f29fb46b1e3918a597361824c7f7c2e9adb6c6ad947db05a36828aa3bb4355942fee130e2f3d5ed3eb35b7093c1cd31c8b8784e7f39c95c9a9b821b7eb867dcd4aa1dbf11410054e3ea1bd2759c479558604cb2000000"
        },
        { 
            "schnorrSecret":"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",
            "schnorrPublicKey":"49e31139f382f266ecca749f54fcdf6bb4c48c2ccab895cb3971d9281ce7b3e3b5993728200867308547b6bc70fa04184e3b2d92732e463f763c0b91d3cc982272c875500d2a6c88b180ee59fad260853e37cbddf1ab9f268c31df00f73f01004a175a663b9a32586f36666b025bc8fa52c275cb8aadcf746825c834c4a5968ec5e083d55a6832bebee8c16adbb564ca3211bdc007e9c0be82b05230f3340525b2459f0acf24ad05eb9c5ab8c20432c289e735db90dcec3ef4b323dc4ef4000000"
        },
        {
            "schnorrSecret":"0400000060d563c1a1cec8e162db0df8d2c0f24adf292431e29fef77fe68977e106216d398f036fc605797583b5f0bcc427230188f32ebc9427b73468cda9385b380b7351bf3434afcda85725beb178efa40718b16ddadfa6bff47ee3edc17455456bd0000bb30f74e03b1448cc555d296849be13095e4ff7752ae5441fc68c61f2488cd36837abb8f95657e55ebbf20d8fccdc32673fd5f7c9db7355285f0d01ed707b273c78e85056e564dc613b7c7980611ec0b17fbe608e5c8135a233ed7e425540100bef6f0bb5e21dc446202a63a4892868ae5ef382d84dee1e2f46f6e33cf9c4bb7bdae5aeeec4e58e32ef113a70ff545dcfbaf80eb39907b11d76571dc1c913d07937297e20da6042e1d95b5e8642f10ab8dddc484c48722d140cd237392a5000000",
            "schnorrPublicKey":"bb30f74e03b1448cc555d296849be13095e4ff7752ae5441fc68c61f2488cd36837abb8f95657e55ebbf20d8fccdc32673fd5f7c9db7355285f0d01ed707b273c78e85056e564dc613b7c7980611ec0b17fbe608e5c8135a233ed7e425540100bef6f0bb5e21dc446202a63a4892868ae5ef382d84dee1e2f46f6e33cf9c4bb7bdae5aeeec4e58e32ef113a70ff545dcfbaf80eb39907b11d76571dc1c913d07937297e20da6042e1d95b5e8642f10ab8dddc484c48722d140cd237392a5000000"
        },
        {
            "schnorrSecret":"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",
            "schnorrPublicKey":"4f85443c89b5550569451310b320ce03d6ea117aebe492aac4510945f67e20ffdd308e52415f8b89508144fa1d66997d82090fcc55e1969e055ac8ca26e6fefcdd0c8930e76f94df70b0701769e6664adda248298002068c4188357f952001001ceb9119562ff4904eb01a807439a4cd5f8e226f10ade178ce081d6345f12576d988a6e80f0bf54ec9ca8548c264485deb522f8e57cf8f7184d9fb01f805f430df7150595a75e6553c1ff868ff992584f3a52327b3d822236c9214ed53c9000000"
        },
        {
            "schnorrSecret":"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",
            "schnorrPublicKey":"30949730d160baec1bf4fcc743f2a533dbd9f6e853960bad9adf1390294f58387c0af553117368aa8c5d7769a0b39279b0fc92001d36323878c9e7ed2bfa1048496049f1d6d147ab949f1f76b0719bd4fc542a8840469291069116e06f0701000c227ab8d2b235d5eab4866451ad850ab2634d20bafd3da8c0b697d919fab2937e9bec3d39e41c7bf028575bcf4acb5c9f9977cd97b190e110f7cd0deae72adeae2e33974e56a0929a36db8245d9784ba44f0f071aa3937ad0257c4c5248010000"
        }
    ]
}

Ok, j’ai tout ce dont j’ai besoin. Je peux quitter l’outil de Bootstrapping à l’aide de la commande exit (qui n’a pas besoin de « seed », elle. Ouf !).

Déclaration de la sidechain

Pour les tests, je vais utiliser ma mainchain ZEN à moi. Il faut lancer zend_oo avec 2 arguments supplémentaires : regtest pour avoir activer la prise en charge des sidechains (elles n’étaient pas encore sur le testnet lorsque j’ai rédigé cet article) et -websocket pour activer les websockets utilisées pour la communication entre mainchain et sidechains.

ATTENTION : Pour utiliser -regtest, on doit désactiver le testnet dans le fichier de configuration de Zen. Donc, on remplace le cas échéant testnet=1 par testnet=0 dans ~/.zen/zen.conf avant de lancer zend.

Une fois zend lancé , je vérifie égalment que je suis bien sur la mainchain vide. A noter qu’il faut utiliser le paramètre regtest pour zen-cli également ! On peut s’en passer en spécifiant regtest=1 dans le fichier de configuration mais je trouve ça plus clair de le taper explicitement.

$ zend -regtest -websocket
Zen server starting
$ zen-cli -regtest getblockcount
0

D’après la doc du SDK, je dois générer 220 blocs pour activer les sidechains. La commande retourne un tableau des hashs des blocs créés. Comme je suis d’un naturel méfiant, je vérifie la présence de 220 blocs après !

$ zen-cli -regtest generate 220
[
  "0ddfa91171f9f839e4db40c802e428bfda341382e1d65d9ea6b327830a33fcbb",
  ...
  "0a6b29f68598275b8aad9f8c56c82141aca7a0ff563786220938873500fd1baf"
]
$ zen-cli -regtest getblockcount
220

Je peux finalement déclarer ma sidechain dans la mainchain ainsi peuplée de ces quelques blocs. Il faut pour cela utiliser l’appel sc_create qui prend les paramètres suivants :

  • La fréquence (exprimée en blocs) entre deux possibles transferts de la sidechain vers la mainchain (Backward Transfer). On choisira 10 pour avoir des comptes ronds.
  • La publicKey obtenue en réponse à l’appel generateKey lors du bootstrap, mon adresse sur la sidechain.
  • Le nombre de tokens initiaux à envoyer à cette adresse. Je choisis 400, de façon empirique.
  • La clé de vérification des transferts. C’est la partie verificationKey de la réponse à l’appel generateProofInfo lors du bootstrap
  • La publicKey obtenue en réponse à l’appel generateVrfKey lors du bootstrap.
  • La partie genSysConstant de la réponse à l’appel generateProofInfo lors du bootstrap effectué précédemment.

Une fois toutes ces données compilées, j’obtiens la commande peu digeste suivante. Si l’exécution se déroule sans problème, je dois obtenir en réponse la transaction de création de la sidechain (txid pour Transaction id), ainsi que l’identifiant de la sidechain créée (scid pour SideChain ID)

$ zen-cli -regtest sc_create 10 "a03bee9112b03f060a26469b0ba23d87c38dda964cf9a1bb3c7f1edbf8a2d6f8" 400 "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" "0ed74aa4afda5ffb358ba4906d0a5429f9840805e1fcc9ea71fca62afb5e97d779d0d2d3dd1bd9a3563166eff9d12b9ab9b6f11baf5639606689c72e16e2577ee338229e015697c8d174782b4caa04af9902eca2f3c384c6f558cf685b11010084a8436bbb18f7ccd039c249afa69f868c79939923ee3fc3ec437b998246db5b4907881702641ec6b41fdc6de644087713115fa2548121280fe8ac85fe31387aee6465767d8ba2189fab2ee8bf702beda6af018b4d68f890176bf2ab599e000000" "b1acb36cdc03885d0f8ebeff5f1b7c21e3719f875a733ed58170621852d45dcd51b96d38e2dbb2002b43c44742d02d1c348280112fa2fe282f01a6a2615d0d33d19b03a0f5337c8ef41c2d84e2db25f56eb88bcf2ed76a094801d2fc83160100"
{
  "txid": "8ae0b7db6c1ff877ce8f89482f70e64851a04fccb1312eee94fbba8140e29a82",
  "scid": "d40188abb42d6ba6302464a847ace23e52b0c7edcf433cd17c10ca008b5e8783"
}

Dans mon cas, la sidechain a été créée dans la transaction 8ae0b7db6c1ff877ce8f89482f70e64851a04fccb1312eee94fbba8140e29a82 et son identifiant est d40188abb42d6ba6302464a847ace23e52b0c7edcf433cd17c10ca008b5e8783

Je peux consulter les détails de la transaction faisant apparaître ces informations, ainsi que les données de création et le montant initial envoyé (400) et l’adresse publique sur la sidechain (« sc address »: « a03bee9112b03f060a26469b0ba23d87c38dda964cf9a1bb3c7f1edbf8a2d6f8 ») .

$ zen-cli -regtest gettransaction "8ae0b7db6c1ff877ce8f89482f70e612eee94fbba8140e29a82"
{
  "amount": -400.00000000,
  "fee": -0.00007127,
  "confirmations": 0,
  "txid": "8ae0b7db6c1ff877ce8f89482f70e64851a04fccb1312eee94fbba8140e29a82",
  "walletconflicts": [
  ],
  "time": 1595456982,
  "timereceived": 1595456982,
  "vsc_ccout": [
    {
      "scid": "d40188abb42d6ba6302464a847ace23e52b0c7edcf433cd17c10ca008b5e8783"
      "n": 0,
      "withdrawal epoch length": 10,
      "value": 400.00000000,
      "address": "a03bee9112b03f060a26469b0ba23d87c38dda964cf9a1bb3c7f1edbf8a2d6
      "wCertVk": "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",
      "customData": "0ed74aa4afda5ffb358ba4906d0a5429f9840805e1fcc9ea71fca62afb5dd1bd9a3563166eff9d12b9ab9b6f11baf5639606689c72e16e2577ee338229e015697c8d174782bca2f3c384c6f558cf685b11010084a8436bbb18f7ccd039c249afa69f868c79939923ee3fc3ec43707881702641ec6b41fdc6de644087713115fa2548121280fe8ac85fe31387aee6465767d8ba2189fda6af018b4d68f890176bf2ab599e000000",
      "constant": "b1acb36cdc03885d0f8ebeff5f1b7c21e3719f875a733ed58170621852d45dbb2002b43c44742d02d1c348280112fa2fe282f01a6a2615d0d33d19b03a0f5337c8ef41c2d84e2f2ed76a094801d2fc83160100"
    }
  ],
  "vft_ccout": [
  ],
  "vjoinsplit": [
  ],
  "details": [
    {
      "sc address": "a03bee9112b03f060a26469b0ba23d87c38dda964cf9a1bb3c7f1edbf8a
      "category": "crosschain",
      "amount": -400.00000000,
      "fee": -0.00007127,
      "size": 7119
    }
  ],
  "hex": 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}

Bien, la transaction de création de sidechain est créée. Elle est pour l’instant dans le pool de transactions. Elle sera donc confirmée et ajoutée dans le prochain bloc.

« Minons-le » donc !

$ zen-cli -regtest generate 1
[
  "04852dabaace286308c2ff9a8ba4968d2e3cf17b7079594b8dff756eb0e0f7f6"
]
$ zen-cli -regtest getblockcount
221

J’obtiens en retour l’id du bloc qui vient d’être ajouté à la mainchain (il y avait 220 blocs, J’en ai ajouté 1). Ici, c’est "04852dabaace286308c2ff9a8ba4968d2e3cf17b7079594b8dff756eb0e0f7f6".

Ce bloc doit donc contenir ma transaction de création de sidechain :

$ zen-cli -regtest getblock "04852dabaace286308c2ff9a8ba4968d2e3cf17b7079594b8dff756eb0e0f7f6"
{
  "hash": "04852dabaace286308c2ff9a8ba4968d2e3cf17b7079594b8dff756eb0e0f7f6",
  "confirmations": 1,
  "size": 7484,
  "height": 221,
  "version": 3,
  "merkleroot": "744840339e167a453ab519a447d775e9ba6720c8289aff48b08448e02e662eab",
  "scTxsCommitment": "15d76826004b8d64607d1559d01c7b7efdd5c5e9872f6a39ec32f17cdd1162b2",
  "tx": [
    "f218efd6527e2defbdfccbcb0903713ec62c0addeebf538a2a9c8341b2a20d0b",
    "8ae0b7db6c1ff877ce8f89482f70e64851a04fccb1312eee94fbba8140e29a82"
  ],
  "cert": [
  ],
  "time": 1595457527,
  "nonce": "00004800fb7dc576c526fad14549e7dc074015424f1ab426840ffe84b4610043",
  "solution": "0896e4f621d95725df0e2057d007ac4b49d60b24bcdee4c7bf3db910ebaebb22b1852318",
  "bits": "200f0f03",
  "difficulty": 1.00001215949611,
  "chainwork": "0000000000000000000000000000000000000000000000000000000000000ebe",
  "anchor": "59d2cde5e65c1414c32ba54f0fe4bdb3d67618125286e6a191317917c812c6d7",
  "valuePools": [
    {
      "id": "sprout",
      "monitored": true,
      "chainValue": 0.00000000,
      "chainValueZat": 0,
      "valueDelta": 0.00000000,
      "valueDeltaZat": 0
    }
  ],
  "previousblockhash": "05cca9315c93542fc809fd9e2a22d22f744151406c5cf01a5c97c4b2a10a7579"
}

Ok, tout est en place, je retrouve bien ma transaction 8ae0b7db6c1ff877ce8f89482f70e64851a04fccb1312eee94fbba8140e29a82 dans le tableau des transactions tx du bloc miné.

Je peux vérifier que la transaction a gagné une confirmation. Bref, la création semble ok.

$ zen-cli -regtest gettransaction "8ae0b7db6c1ff877ce8f89482f70e64851a04fccb1312eee94fbba8140e29a82" | grep confirmations
  "confirmations": 1,

D’une façon générale, on peut obtenir les infomations sur les sidechains grâce à la commande zen-cli -regtest getscinfo, à laquelle on peut optionnellement passer en paramètre un identifiant de sidechain. En l’absence de ce paramètre, je vais récupérer l’ensemble des sidechains :

$ zen-cli -regtest getscinfo "d40188abb42d6ba6302464a847ace23e52b0c7edcf433cd17c10ca008b5e8783"
{
  "scid": "d40188abb42d6ba6302464a847ace23e52b0c7edcf433cd17c10ca008b5e8783",
  "balance": 0.00000000,
  "epoch": 0,
  "end epoch height": 230,
  "state": "ALIVE",
  "ceasing height": 233,
  "creating tx hash": "8ae0b7db6c1ff877ce8f89482f70e64851a04fccb1312eee94fbba8140e29a82",
  "created in block": "04852dabaace286308c2ff9a8ba4968d2e3cf17b7079594b8dff756eb0e0f7f6",
  "created at block height": 221,
  "last certificate epoch": -1,
  "last certificate hash": "0000000000000000000000000000000000000000000000000000000000000000",
  "withdrawalEpochLength": 10,
  "wCertVk": "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",
  "customData": "0ed74aa4afda5ffb358ba4906d0a5429f9840805e1fcc9ea71fca62afb5e97d779d0d2d3dd1bd9a3563166eff9d12b9ab9b6f11baf5639606689c72e16e2577ee338229e015697c8d174782b4caa04af9902eca2f3c384c6f558cf685b11010084a8436bbb18f7ccd039c249afa69f868c79939923ee3fc3ec437b998246db5b4907881702641ec6b41fdc6de644087713115fa2548121280fe8ac85fe31387aee6465767d8ba2189fab2ee8bf702beda6af018b4d68f890176bf2ab599e000000",
  "constant": "b1acb36cdc03885d0f8ebeff5f1b7c21e3719f875a733ed58170621852d45dcd51b96d38e2dbb2002b43c44742d02d1c348280112fa2fe282f01a6a2615d0d33d19b03a0f5337c8ef41c2d84e2db25f56eb88bcf2ed76a094801d2fc83160100",
  "immature amounts": [
    {
      "maturityHeight": 224,
      "amount": 400.00000000
    }
  ]
}

La Génèse

A ce stade, la mainchain contient la déclaration de la sidechain.

Je dois à présent lui donner vie grâce à l’appli SimpleApp qui sera un node de cette sidechain.

Je vais générer un fichier de configuration avec les données nécessaires pour que SimpleApp sache faire tourner la sidechain.

Pour configurer mon noeud de la sidechain, j’ai besoin de collecter et compiler plusieurs informations.

  1. La SideChain Genesis Info

Je l’obtiens grâce à la commande getscgenesisinfo de zen-cli en lui passant en paramètre le scid(SideChain ID) récupéré lors de la création de la sidechain avec sc_create.

$ zen-cli -regtest getscgenesisinfo "d40188abb42d6ba6302464a847ace23e52b0c7edcf433cd17c10ca008b5e8783"
  1. La partie secret obtenue en réponse à l’appel generateKey lors du bootstrap.
  2. La partie vrfSecret obtenue en réponse à l’appel generateVrfKey lors du bootstrap.

On va utiliser à nouveau l’outil de bootstrap qui fournit la commande genesisinfo qui va nous fournir les informations nécessaires pour la configuration de la sidechain.

L’utilisation est la suivante :

genesisinfo  {"info": "Données 1", "secret": "Données 2", "vrfSecret": "Données 3"} 

Pour une raison inconnue l’outil de Bootstrap ne voulait pas exécuter la commande genesisinfo. J’ai donc utilisé l’autre forme d’appel de l’outil, non-interactive, en tapant tout sur une seule ligne. Attention ! Dans ce cas, il faut protéger les guillemets avec des antislashs :

Après s’être placé dans le répertoire Sidechains-SDK, la commande à taper directement dans bash est donc :

$ java -jar tools/sctool/target/Sidechains-SDK-ScBootstrappingTools-0.2.1.jar genesisinfo  {\"info\": \"Données 1\", \"secret\": \"Données 2\", \"vrfSecret\": \"Données 3\"}

Une fois les données remplacées, attention à ne pas se tromper :

$ java -jar tools/sctool/target/Sidechains-SDK-ScBootstrappingTools-0.2.1.jar genesisinfo  {\"info\":\"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\"secret\": \"00531e40d4036d808d2101756debc7fd2365cd76da1176f5bf2ed09603d01f711ca03bee9112b03f060a26469b0ba23d87c38dda964cf9a1bb3c7f1edbf8a2d6f8\", \"vrfSecret\": \"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\"}

Cette commande retourne une structure à réutiliser plus tard. Je la mets de côté :

{
    "scId":"d40188abb42d6ba6302464a847ace23e52b0c7edcf433cd17c10ca008b5e8783",
    "scGenesisBlockHex":"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    "powData":"d3bd185f030f0f20d3bd185f030f0f20d3bd185f030f0f20d2bd185f030f0f20d2bd185f030f0f20d2bd185f030f0f20d2bd185f030f0f20d2bd185f030f0f20d2bd185f030f0f20d1bd185f030f0f20d1bd185f030f0f20d1bd185f030f0f20d1bd185f030f0f20d1bd185f030f0f20d1bd185f030f0f20d0bd185f030f0f20d0bd185f040f0f20d0bd185f040f0f20d0bd185f040f0f20d0bd185f040f0f20d0bd185f040f0f20cfbd185f040f0f20cfbd185f040f0f20cfbd185f040f0f20cfbd185f040f0f20cfbd185f040f0f20cfbd185f040f0f20cebd185f040f0f20",
    "mcBlockHeight":221,
    "mcNetwork":"regtest",
    "withdrawalEpochLength":10
}

J’ai tout ce qu’il me faut pour rédiger le fichier de configuration qui permettra de lancer un node de gestion de ma sidechain. J’utilise le modèle fourni dans le Sidechains-SDK situé ici à partir de la racine du SDK : examples/simpleapp/src/main/resources/settings_basic.conf.

Voici à quoi il ressemble :

scorex {
  dataDir = /tmp/scorex/data/blockchain
  logDir = /tmp/scorex/data/log

  restApi {
    bindAddress = "127.0.0.1:9085"
    api-key-hash = ""
  }

  network {
    nodeName = "testNode1"
    bindAddress = "127.0.0.1:9084"
    knownPeers = []
    agentName = "2-Hop"
  }

  websocket {
    address = "ws://localhost:8888"
    connectionTimeout = 100 milliseconds
    reconnectionDelay = 1 seconds
    reconnectionMaxAttempts = 1
  }

  withdrawalEpochCertificate {
    submitterIsEnabled =
    signersPublicKeys =
    signersThreshold =
    signersSecrets =
    provingKeyFilePath = "../../sdk/src/test/resources/sample_proving_key_7_keys_with_threshold_5"
    verificationKeyFilePath = "../../sdk/src/test/resources/sample_vk_7_keys_with_threshold_5"
  }

  wallet {
    seed = "seed1"
    genesisSecrets =
  }
}

J’en fais une copie appelée ma-sidechain.conf dans le même répertoire et y ajoute les éléments spécifiques à ma sidechain :

$ cp examples/simpleapp/src/main/resources/settings_basic.conf examples/simpleapp/src/main/resources/ma-sidechain.conf

J’ajoute 2 lignes de configuration à la structure websocket, le fichier modèle n’était pas à jour au moment de l’écriture de cet article et une tentative de lancement de la sidechain se soldait par l’erreur suivante : "Exception in thread "main" com.typesafe.config.ConfigException$Missing: No configuration setting found for key 'scorex.websocket.zencliCommandLine'"

Il faut par ailleurs affecter à la variable zencliCommandLine le chemin permettant d’exécuter zen-cli. Si ce dernier est dans le PATH, alors, la valeur "zen-cli" suffit. De même, si tu utilises des paramètres particuliers (argument conf spécifique par exemple, tu peux les ajouter au tableau zencliCommandLineArguments.

zencliCommandLine = "zen-cli"
zencliCommandLineArguments = []

Je dois ensuite adapter la structure withdrawalEpochCertificate :

  • submitterIsEnabled pour activer les transferts de la sidechain vers la mainchain.
  • signersPublicKeys : C’est un tableau contenant la liste des schnorrPublicKey générée par la commande generateProofInfo. Il est important de respecter l’ordre des clés.
  • signersThreshold : le paramètre threshold utilisé lors de la commande generateProofInfo
  • signersSecrets : C’est un tableau contenant la liste des schnorrSecret générée par la commande generateProofInfo. Il est important de respecter l’ordre des clés.
  • provingKeyFilePath et verificationKeyFilePath : les chemins vers les 2 fichiers fournis dans le SDK. Il faut toutefois modifier la valeur par défaut et supprimer la partie ../../ avant sdk/.. pour correspondre au chemin relatif à partir d’où on lance le node.

Vient ensuite le paramétrage du wallet dans la structure du même nom. Cette initialisation du wallet est indispensable pour retrouver les fonds envoyés depuis la mainchain lors de la création de la sidechain. Les 400ZEN initialement envoyés seront ainsi disponibles dans ce wallet sur la sidechain.

  • seed : une graine au hasard. On utilisera "q7yYYI80978LJF04r501n8Mv58222O2s"
  • genesisSecrets : Un tableau contenant les clés secret et vrfSecret des appels à generateKey et generateVrfKey.

Enfin, à l’intérieur de la structure scorex, après wallet mais avant la fermeture de la dernière accolade, je dois ajouter une structure nommée genesis contenant le retour de la commande genesisinfo vue plus haut.

Le reste des valeurs reste à la valeur par défaut et le fichier terminé doit ressembler à cela :

scorex {
  dataDir = /tmp/scorex/data/blockchain
  logDir = /tmp/scorex/data/log

  restApi {
    bindAddress = "127.0.0.1:9085"
    api-key-hash = ""
  }

  network {
    nodeName = "testNode1"
    bindAddress = "127.0.0.1:9084"
    knownPeers = []
    agentName = "2-Hop"
  }

  websocket {
          address = "ws://localhost:8888"
          connectionTimeout = 100 milliseconds
          reconnectionDelay = 1 seconds
          reconnectionMaxAttempts = 1
          zencliCommandLine = ""
          zencliCommandLineArguments = []
  }

  withdrawalEpochCertificate {
    submitterIsEnabled = true
    signersPublicKeys = ["328f42588d9df851c2c2a2b11336a5737ba913c0f92177c9d0a854c7564b48da761e53205d30d7f60e21ac382b452cabb7f9274e199a59976b0bd6aaf8f59ac171f6444b9bc594473a20c5a3c89e0d1335ffc8d0ee821c60ebcb1239601d0100dae9144ae4bd8d56638befec496d97eadc590acc2a04b9a210ec475b2505cd6774b1be10353b060c31ae1142b90f436fb5e4e1905814eec8a3e86e0cc5fcff36b686bb92d2f6200ebfc714cfd48db5c1ab3fa77b4747fb60a4f7ae6bd56e000000"
                         "a3c8f596cec2583278fcb7b460d0ae3b99283d26a22b599b1bfc41a5bc1a1328540eb64362f688437c553c114291853b2ab752fb6baf172f9a7cbdf7fbdb382445cd4672f313426fa92b071ce840103c6ee1463ff0c94a467bec754829a30000815e97336edbccb9523e80699f5c9ef893b5d51e41a50e757f86fc8aa13751b0f13041814140a98a4768f31917d59dd6af87e66a92a57beb25109bed3a12a6b4a9286746d778da486bec3e5bde2381187f243005011b6ccf05fd7568bf94000000"
                         "c76abd8288ec3b05e947adcf66a4fd91b8bbeae23d07cfe0196abffdc5d187f7c7cda485c00789f10d8c1650569a6fd4485cfa36e6247268e2aba1563beb3e2c8be87eae0df4a85f5057fddfd1f0bceef7998d20a9efcabc9e0a06e2fd7e010042c0738a904595ed5e3d7f29fb46b1e3918a597361824c7f7c2e9adb6c6ad947db05a36828aa3bb4355942fee130e2f3d5ed3eb35b7093c1cd31c8b8784e7f39c95c9a9b821b7eb867dcd4aa1dbf11410054e3ea1bd2759c479558604cb2000000"
                         "49e31139f382f266ecca749f54fcdf6bb4c48c2ccab895cb3971d9281ce7b3e3b5993728200867308547b6bc70fa04184e3b2d92732e463f763c0b91d3cc982272c875500d2a6c88b180ee59fad260853e37cbddf1ab9f268c31df00f73f01004a175a663b9a32586f36666b025bc8fa52c275cb8aadcf746825c834c4a5968ec5e083d55a6832bebee8c16adbb564ca3211bdc007e9c0be82b05230f3340525b2459f0acf24ad05eb9c5ab8c20432c289e735db90dcec3ef4b323dc4ef4000000"
                         "bb30f74e03b1448cc555d296849be13095e4ff7752ae5441fc68c61f2488cd36837abb8f95657e55ebbf20d8fccdc32673fd5f7c9db7355285f0d01ed707b273c78e85056e564dc613b7c7980611ec0b17fbe608e5c8135a233ed7e425540100bef6f0bb5e21dc446202a63a4892868ae5ef382d84dee1e2f46f6e33cf9c4bb7bdae5aeeec4e58e32ef113a70ff545dcfbaf80eb39907b11d76571dc1c913d07937297e20da6042e1d95b5e8642f10ab8dddc484c48722d140cd237392a5000000"
                         "4f85443c89b5550569451310b320ce03d6ea117aebe492aac4510945f67e20ffdd308e52415f8b89508144fa1d66997d82090fcc55e1969e055ac8ca26e6fefcdd0c8930e76f94df70b0701769e6664adda248298002068c4188357f952001001ceb9119562ff4904eb01a807439a4cd5f8e226f10ade178ce081d6345f12576d988a6e80f0bf54ec9ca8548c264485deb522f8e57cf8f7184d9fb01f805f430df7150595a75e6553c1ff868ff992584f3a52327b3d822236c9214ed53c9000000"
                         "30949730d160baec1bf4fcc743f2a533dbd9f6e853960bad9adf1390294f58387c0af553117368aa8c5d7769a0b39279b0fc92001d36323878c9e7ed2bfa1048496049f1d6d147ab949f1f76b0719bd4fc542a8840469291069116e06f0701000c227ab8d2b235d5eab4866451ad850ab2634d20bafd3da8c0b697d919fab2937e9bec3d39e41c7bf028575bcf4acb5c9f9977cd97b190e110f7cd0deae72adeae2e33974e56a0929a36db8245d9784ba44f0f071aa3937ad0257c4c5248010000"
                        ]
    signersThreshold = 5
    signersSecrets = ["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",
                         "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",
                         "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",
                         "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",
                         "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",
                         "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",
                         "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"
                        ]
    provingKeyFilePath = "sdk/src/test/resources/sample_proving_key_7_keys_with_threshold_5"
    verificationKeyFilePath = "sdk/src/test/resources/sample_vk_7_keys_with_threshold_5"
  }

  wallet {
    seed = "q7yYYI80978LJF04r501n8Mv58222O2s"
    genesisSecrets = ["00531e40d4036d808d2101756debc7fd2365cd76da1176f5bf2ed09603d01f711ca03bee9112b03f060a26469b0ba23d87c38dda964cf9a1bb3c7f1edbf8a2d6f8"
                      "0300000060b218f4c543504110af4dd02a72a764d5c1c59beb1e6dc3ea0dd85f86685eade90f567f9937b3a4fc36bb5adfe480ac381ccdbb91f11c269e2a41d71d829fc312cdef48bf75818447405bb86202a1d39f0503491207eab329bb77047805f800000ed74aa4afda5ffb358ba4906d0a5429f9840805e1fcc9ea71fca62afb5e97d779d0d2d3dd1bd9a3563166eff9d12b9ab9b6f11baf5639606689c72e16e2577ee338229e015697c8d174782b4caa04af9902eca2f3c384c6f558cf685b11010084a8436bbb18f7ccd039c249afa69f868c79939923ee3fc3ec437b998246db5b4907881702641ec6b41fdc6de644087713115fa2548121280fe8ac85fe31387aee6465767d8ba2189fab2ee8bf702beda6af018b4d68f890176bf2ab599e000000"
                     ]
  }

  genesis {
    "scId":"d40188abb42d6ba6302464a847ace23e52b0c7edcf433cd17c10ca008b5e8783",
    "scGenesisBlockHex":"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    "powData":"d3bd185f030f0f20d3bd185f030f0f20d3bd185f030f0f20d2bd185f030f0f20d2bd185f030f0f20d2bd185f030f0f20d2bd185f030f0f20d2bd185f030f0f20d2bd185f030f0f20d1bd185f030f0f20d1bd185f030f0f20d1bd185f030f0f20d1bd185f030f0f20d1bd185f030f0f20d1bd185f030f0f20d0bd185f030f0f20d0bd185f040f0f20d0bd185f040f0f20d0bd185f040f0f20d0bd185f040f0f20d0bd185f040f0f20cfbd185f040f0f20cfbd185f040f0f20cfbd185f040f0f20cfbd185f040f0f20cfbd185f040f0f20cfbd185f040f0f20cebd185f040f0f20",
    "mcBlockHeight":221,
    "mcNetwork":"regtest",
    "withdrawalEpochLength":10
  }
}

Nota bene : Concernant dataDir et logDir, il pourrait être judicieux de les stocker dans un sous-répertoire tmp du répertoire utilisateur plutôt que de les laisser dans le répertoire /tmp/ global mais pour l’instant, j’ai laissé tel quel.

Je peux alors enfin lancer ma SideChain. Ceci doit être fait dans le répertoire principal du SideChain-SDK :

$ pwd
/home/zendoo/Sidechains-SDK
$ java -cp ./examples/simpleapp/target/Sidechains-SDK-simpleapp-0.2.1.jar:./examples/simpleapp/target/lib/* com.horizen.examples.SimpleApp ./examples/simpleapp/src/main/resources/ma-sidechain.conf
[2-Hop-akka.actor.default-dispatcher-3] INFO scorex.core.network.NetworkController - Declared address: None
[main] INFO com.horizen.SidechainApp - Starting application with settings
SidechainSettings(ScorexSettings(/tmp/scorex/data/blockchain,/tmp/scorex/data/log,NetworkSettings(testNode1,None,false,Vector(),/127.0.0.1:9084,20,1 second,false,None,None,None,30 seconds,2 seconds,2,0.0.1,2-Hop,1048576,8096,512,512,5 seconds,2 minutes,20 seconds,4 minutes,Some(5 seconds),Some(5 seconds),1024,[B@2a640157,2 minutes,64,1 hour,5 minutes,100),RESTApiSettings(/127.0.0.1:9085,None,Some(*),5 seconds),NetworkTimeProviderSettings(pool.ntp.org,30 minutes,30 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)))
[2-Hop-akka.actor.default-dispatcher-3] INFO scorex.core.network.NetworkController - Registering handlers for List((1,GetPeers message), (2,Peers message))
[2-Hop-akka.actor.default-dispatcher-2] INFO scorex.core.network.NetworkController - Successfully bound to the port 9084
[main] INFO com.horizen.SidechainApp - calculated sysDataConstant is: b1acb36cdc03885d0f8ebeff5f1b7c21e3719f875a733ed58170621852d45dcd51b96d38e2dbb2002b43c44742d02d1c348280112fa2fe282f01a6a2615d0d33d19b03a0f5337c8ef41c2d84e2db25f56eb88bcf2ed76a094801d2fc83160100
[2-Hop-akka.actor.default-dispatcher-2] INFO scorex.core.network.NetworkController - Registering handlers for List((55,Inv), (22,RequestModifier), (33,Modifier), (65,Sync))
[2-Hop-akka.actor.default-dispatcher-3] INFO com.horizen.consensus.ConsensusDataStorage - Storage with id:1878272466 -- Add stake to consensus data storage: for epochId 8bbc8219cab8b9b1f68513f89d3489bf950635a2ee90192237c9da6ca5fb9c8f stake info: StakeConsensusEpochInfo(rootHash=7006b227eaa723e4afffb404383fd07166959275ec9c8f7e6665314c85ff1b03, totalStake=40000000000)
[2-Hop-akka.actor.default-dispatcher-3] INFO com.horizen.consensus.ConsensusDataStorage - Storage with id:1878272466 -- Add nonce to consensus data storage: for epochId 8bbc8219cab8b9b1f68513f89d3489bf950635a2ee90192237c9da6ca5fb9c8f nonce info: NonceConsensusEpochInfo(consensusNonce=000000005f182866
[main] INFO com.horizen.websocket.WebSocketConnectorImpl - Starting web socket connector...
[main] INFO com.horizen.websocket.WebSocketConnectorImpl - Web socket connector started.
[2-Hop-akka.actor.default-dispatcher-2] INFO com.horizen.certificatesubmitter.CertificateSubmitter - sysDataConstant in Certificate submitter is: b1acb36cdc03885d0f8ebeff5f1b7c21e3719f875a733ed58170621852d45dcd51b96d38e2dbb2002b43c44742d02d1c348280112fa2fe282f01a6a2615d0d33d19b03a0f5337c8ef41c2d84e2db25f56eb88bcf2ed76a094801d2fc83160100
[2-Hop-akka.actor.default-dispatcher-2] INFO com.horizen.certificatesubmitter.CertificateSubmitter - Found proving key file at location: /home/zendoo/Sidechains-SDK/sdk/src/test/resources/sample_proving_key_7_keys_with_threshold_5
[2-Hop-scorex.executionContext-11] INFO com.horizen.certificatesubmitter.CertificateSubmitter - Backward transfer certificate submitter was successfully started.
Simple Sidechain application successfully started...

Il est possible de véfifier que le node est bien en écoute sur les ports 9084 (SideChain) et 9085 (API) :

$ netstat -plnt
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
[...]
tcp6       0      0 127.0.0.1:9084          :::*                    LISTEN      4834/java
tcp6       0      0 127.0.0.1:9085          :::*                    LISTEN      4834/java

Il est possible d’interagir avec SimpleApp via une API disponible sur le port 9085. Je vérifie par exemple si je retrouve bien dans la sidechain les informations de la génèse, le Genesis Block :

$ curl -X POST "http://127.0.0.1:9085/mainchain/genesisBlockReferenceInfo" -H "accept: application/json"
{
  "result" : {
    "blockReferenceInfo" : {
      "mainchainHeaderSidechainBlockId" : "8bbc8219cab8b9b1f68513f89d3489bf950635a2ee90192237c9da6ca5fb9c8f",
      "mainchainReferenceDataSidechainBlockId" : "8bbc8219cab8b9b1f68513f89d3489bf950635a2ee90192237c9da6ca5fb9c8f",
      "hash" : "04852dabaace286308c2ff9a8ba4968d2e3cf17b7079594b8dff756eb0e0f7f6",
      "parentHash" : "05cca9315c93542fc809fd9e2a22d22f744151406c5cf01a5c97c4b2a10a7579",
      "height" : 221
    }
  }
}

Voilà, J’ai bien ma sidechain déclarée dans la mainchain, fonctionnelle et répondant via une interface RPC sur le port 9085.

Il est possible de se connecter à la doc de l’API sur cette url : http://127.0.0.1:9085/swagger

Pour rendre les connexions distantes possibles, il est possible d’éditer la structure restApi de la configuration de la sidechain comme suit :

restApi {
    bindAddress = "0.0.0.0:9085"
    api-key-hash = ""
  }

Il est ensuite possible de filtrer les clients par IP à l’aide du firewall, mais on sort du cadre de cet article déjà bien long.

17e541ca71ffd37d082106e08d86b9e8.png

A bientôt pour de nouvelles aventures ! Dans le prochain article on transférera des ZEN dans tous les sens.

Le plan du dossier : Les Sidechains Horizen

  1. Zend_oo, le node de la MainChain Horizen
  2. Création de ma première saidechain : Tu es ici 🙂
  3. Transferts entre chaînes
  4. Bonus : Gagner des ZEN : Le Faucet en détail
  5. Bonus : Monter un secure node ZEN en 20 minutes

Liens

Le README en anglais sur GiHub : https://github.com/ZencashOfficial/zend_oo/blob/sidechains_testnet/README.md

Présentation des sidechains dans l’Academy Horizen Academy (VF) : https://academy.horizen.global/fr/horizen/expert/sidechains/