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Gavin presents SPREE at Tokyo DOT Day Gavin presents SPREE at Tokyo DOT Day

SPREE (Shared Protected Runtime Execution Enclaves), also known as "trust wormholes," allows parachains to trust one another, regardless of how they upgrade and evolve.

How it works

  • Parachains can opt-in to special runtime logic fragments (like smart contracts)
  • Own storage, own ICMP endpoint
  • All instances across parachains have identical logic
  • Executes alongside parachain
  • Protected: storage can not be altered by parachain logic; messages can not be faked from them by parachains


  • Smart protocols - Reddit post by u/tawaran describing "smart protocols" an idea that inspired SPREE.