Fault Proof Program

The Fault Proof Program defines the verification of claims of the state-transition outputs of the L2 rollup as a pure function of L1 data.

The op-program is the reference implementation of the program, based on op-node and op-geth implementations.

The program consists of:

• Prologue: load the inputs, given minimal bootstrapping, with possible test overrides.

• Main content: process the L2 state transition, i.e. derive the state changes from the L1 inputs.

• Epilogue: inspect the state changes to verify the claim.