OP Stack
OP Stack is the standardised, shared, and open-source development stack that powers Optimism.
It is a public good maintained by the Optimism Collective.
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The OP Stack is primarily focused around the creation of a shared, high-quality, and fully open-source system for creating new L2 blockchains.
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OP Stack today
Optimism Bedrock is the current iteration of the OP Stack.
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Currently, the APIs for the different layers of the OP Stack are still tightly coupled to this Rollup configuration of the stack.