v0.15.5

XChain Platform v0.15.5

A patch train. xchain-node and xchain-indexer move to 0.15.5; xchain-encoder stays at 0.15.4, xchain-sync, xchain-sdk and xchain-explorer at 0.15.3, xchain-hub at 0.15.2, and the other six components keep the tags they shipped under in v0.15.0. The pinned set is src/release-manifest.json at this tag; the signed artifact set and SHA256SUMS.asc are attached.

Testnet activation of order-independent chunked deployment moves earlier

v0.15.3 shipped order-independent chunked contract deployment with its Bitcoin, Litecoin and Dogecoin testnet activation set for 2026-09-10 00:00:00 UTC, leaving two days for testnet indexer operators to update. Every testnet indexer was already running v0.15.3 within hours, and a fresh indexer parsing the Bitcoin testnet chain from its genesis under that release reproduced the running network block for block, so the buffer was not needed. The activation now happens at 2026-09-08 12:00:00 UTC. The instant stays above the last chunked-DEPLOY history on Bitcoin testnet and above the chain's median time past at the re-pin, so no block any node has parsed is reinterpreted. Mainnet and regtest are unchanged (genesis-active).

Upgrade notes

Testnet indexer operators must run v0.15.5 before 2026-09-08 12:00:00 UTC: a node still on v0.15.3 would activate the rule at the old instant and diverge from the network in between. xchain-node update all moves a release node to this train. Mainnet nodes are unaffected by the change and may update at their convenience.