Source de :

• https://validator.info/terra-classic/governance/12193
• http://discourse.luncgoblins.com/t/proposal-fix-legacy-contracts-by-core-upgrade/154

Proposition : Correction des contrats hérités par une mise à niveau du noyau

Cette proposition vise à obtenir l’autorisation de réintroduire la prise en charge de l’exécution des anciens contrats CosmWasm. Le correctif rétablit les fonctionnalités interrompues lors de la mise à jour de la version 2.1.0 en 2022.

Proposition : Réactiver l’exécution des contrats hérités

Résumé

Cette proposition vise à obtenir l’approbation d’un correctif du noyau de la chaîne qui réintroduira la prise en charge de l’exécution des contrats CosmWasm. La modification consiste en un petit correctif (~30-50 lignes de code) qui rétablit la fonctionnalité interrompue lors de la mise à jour v2.1.0 en 2022.

Les contrats concernés comprennent non seulement un certain nombre de pools Astroport et potentiellement quelques pools Terraswap restants. Si la réactivation de ces contrats permet de rétablir l’accès aux liquidités actuellement bloquées sans nécessiter de migration des contrats, la correction permet également de rétablir le fonctionnement d’un grand nombre d’anciens contrats qui prévoient la gestion des taxes sur la chaîne.

Contexte

Lors de la mise à jour v2.1.0, la prise en charge des requêtes personnalisées Terra a été modifiée, ce qui a entraîné l’arrêt des contrats qui demandaient le taux d’imposition sur la chaîne ou les taux de change à partir du module oracle. Cela a affecté plusieurs pools de liquidité détenant des quantités importantes de LUNC et USTC (ainsi que d’autres jetons).

Principales conclusions d’un test épicutané au niveau des nœuds :

• Le correctif permet aux transactions contre ces contrats d’aboutir à nouveau.
• Les pools contiennent actuellement de grandes quantités de liquidités bloquées.
• Exemples de soldes (arrondis) :
  • Piscine LUNC/USTC : ~700M LUNC, ~6M USTC
  • piscine bLUNA/LUNC : ~150M LUNC
  • Piscine MIR/USTC : ~6M USTC
  • Pool ASTRO/USTC : ~3,9 MILLIONS USTC
  • Pool kUST/USTC : ~2.9M USTC
• Sur 465 contrats Astroport identifiés :
  • ~27,4 MILLIONS USTC
  • ~959M LUNC

Ces jetons sont actuellement inaccessibles en raison de la rupture du chemin d’exécution. Cela signifie que les opérateurs ne peuvent pas utiliser ces pools du tout (natif ↔ natif) ou seulement dans un sens (cw20 ← natif).

Implications

La réactivation de l’exécution est censée “rouvrir” instantanément ces pools. Cela présente deux aspects :

• Positif : La chaîne et ses utilisateurs retrouvent l’accès à leurs liquidités. Les jetons qui devraient être en circulation redeviennent utilisables. En outre, beaucoup plus de contrats recommenceront à fonctionner sans qu’il soit nécessaire de les migrer.
• Négatif : Les pools concernés sont fortement déséquilibrés. Immédiatement après l’activation, les utilisateurs et très probablement les robots d’arbitrage draineront les opportunités évidentes. Exemple : le pool LUNC/USTC se négocie à environ 2× le juste ratio du marché. Cela signifie que d’importantes fluctuations se produiront dans les minutes qui suivront la mise en service du système de fixation. Cela pourrait avoir un impact positif ou négatif sur le prix du LUNC et de l’USTC sur d’autres DEX/CEX, à court terme également.

Risques

• La fuite des arbitrages : Les premiers à se lancer (principalement les robots) réaliseront des profits considérables, au détriment des détenteurs de titres à long terme.
• Perception du public : Elle peut être perçue comme le “déblocage” de grandes quantités d’USTC/LUNC, ce qui peut être perçu négativement, bien que ces pièces aient toujours été destinées à être débloquées. Le “verrouillage” a eu lieu en raison d’un effet secondaire de la mise à niveau du noyau.
• Le calendrier : Les fournisseurs de liquidités dans les pools affectés et actuellement dysfonctionnels ne peuvent pas “sortir plus tôt” avant l’application du correctif.
• Précédent : Certains diront que cela crée un précédent pour les correctifs L1 afin de prendre en charge les dApps. Cependant, la panne a été causée à l’origine par une mise à niveau L1, et le correctif est petit et limité.

Conclusion

Ce correctif rétablit des fonctionnalités qui avaient été involontairement interrompues. Il débloque les liquidités pour les utilisateurs et les contrats concernés, et rétablit les fonctionnalités des anciens contrats sur la chaîne.

Options de vote :

• OUI – Approuver le correctif pour réactiver l’exécution des contrats existants.
• NON – N’appliquez pas le correctif, les contrats existants restent inutilisables.
• NON AVEC VETO – Forte opposition.
• ABSTENTION – Pas d’avis.

Informations complémentaires (ne faisant pas partie du texte de la proposition)

Les changements de code ont été effectués et peuvent être vus ici : fix : Contrats anciens utilisant des variantes de requêtes terra par StrathCole – Pull Request #602 – classic-terra/core – GitHub

Informations supplémentaires sur les tests :
J’ai créé un script de test local qui contient le code wasm (contrat) original de quatre contrats d’astroport. Les étapes du script de test :

1. Démarrez une chaîne locale avec un seul nœud en utilisant la version 1.1.0 de la chaîne.
2. déployer les quatre contrats de paires d’astroports, les instancier et tester l’apport de liquidités, l’échange et le retrait de liquidités.
3. passer par toutes les mises à jour de la chaîne (c’est-à-dire v2.0.1, v2.1.1, v2.2.1, …, v3.5.1) et tester à nouveau les opérations de liquidité et de swap
4. comme prévu à partir de la v2.1, la fourniture de liquidités fonctionne toujours, mais les échanges (jetons natifs) et les retraits donnent lieu à des problèmes d’accès à la liquidité.

Error: rpc error: code = Unknown desc = rpc error: code = Unknown desc = failed to execute message; message index: 0: Generic error: Querier system error: Unsupported query type: unknown terra query variant: execute wasm contract failed [classic-terra/[email protected]/x/wasm/keeper/keeper.go:396] With gas wanted: '18446744073709551615' and gas used: '187740' : unknown request

5. mettre à jour vers la version locale corrigée, puis réexécuter les tests. Cela a confirmé que les échanges et les retraits fonctionnaient à nouveau par la suite :

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