Remove Pre-Fault-Proofs Legacy Code

[ajsutton]

Description

Design doc to agree on a strategy to allow us to remove the pre-fault proof code such as L2OutputOracle.

[tynes]

I am definitely supportive of this as we have a lot of technical debt in various parts of the codebase and removing legacy things will simplify future development. The big win that I see here from a product pov is that it effectively forces us to ensure that the deploy script can deploy production ready chains that have fault proofs enabled at genesis.

[K-Ho]

Thanks for the writeup! One question:

• What would the bond be, and is it parameterizable? If the bond is a reasonable amount, I think this should be ok. RaaS providers and chain operators will accept the extra cost if it improves likelihood of forward compatibility of Alt-DA and custom gas token chains with Fault proofs. I think this is mainly a question of when we do this. This is going to mostly be work for Devrel to coordinate with RaaS providers and Chain operators to safely get upgraded to using the permissioned game.

[ajsutton]

@K-Ho The bond is hard coded. It increases as you go deeper down the fault game but for the initial proposal it's 0.08ETH.

[ajsutton]

For reference, bond amounts based on the depth of the claim:

Depth	Bond (Wei)	Bond (ETH)
1	8E+16	0.08
2	8.7594E+16	0.087594
3	9.59088E+16	0.0959088
4	1.05013E+17	0.105013
5	1.14981E+17	0.1149812
6	1.25896E+17	0.125896
7	1.37847E+17	0.1378466
8	1.50932E+17	0.1509318
9	1.65259E+17	0.165259
10	1.80946E+17	0.1809462
11	1.98122E+17	0.1981224
12	2.16929E+17	0.2169292
13	2.37521E+17	0.2375214
14	2.60068E+17	0.260068
15	2.84755E+17	0.284755
16	3.11785E+17	0.3117854
17	3.41382E+17	0.3413818
18	3.73787E+17	0.3737874
19	4.09269E+17	0.4092692
20	4.48119E+17	0.4481192
21	4.90657E+17	0.490657
22	5.37233E+17	0.5372326
23	5.88229E+17	0.5882294
24	6.44067E+17	0.6440672
25	7.05205E+17	0.7052052
26	7.72147E+17	0.772147
27	8.45443E+17	0.845443
28	9.25697E+17	0.9256968
29	1.01357E+18	1.0135686
30	1.10978E+18	1.1097818
31	1.21513E+18	1.2151278
32	1.33047E+18	1.330474
33	1.45677E+18	1.4567694
34	1.59505E+18	1.5950532
35	1.74646E+18	1.7464638
36	1.91225E+18	1.912247
37	2.09377E+18	2.0937672
38	2.29252E+18	2.2925182
39	2.51014E+18	2.5101358
40	2.74841E+18	2.7484106
41	3.0093E+18	3.0093036
42	3.29496E+18	3.294962
43	3.60774E+18	3.6077366
44	3.9502E+18	3.9502012
45	4.32517E+18	4.3251744
46	4.73574E+18	4.7357418
47	5.18528E+18	5.1852824
48	5.6775E+18	5.6774958
49	6.21643E+18	6.2164324
50	6.80653E+18	6.8065278
51	7.45264E+18	7.452638
52	8.16008E+18	8.1600802
53	8.93468E+18	8.9346764
54	9.7828E+18	9.7828012
55	1.07114E+19	10.7114344
56	1.17282E+19	11.728218
57	1.28415E+19	12.84152
58	1.40605E+19	14.0605022
59	1.53952E+19	15.3951964
60	1.68566E+19	16.8565866
61	1.84567E+19	18.4566994
62	2.02087E+19	20.2087028
63	2.2127E+19	22.1270154
64	2.42274E+19	24.227424
65	2.65272E+19	26.527214
66	2.90453E+19	29.0453118
67	3.18024E+19	31.80244
68	3.48213E+19	34.821289
69	3.81267E+19	38.1267024
70	4.17459E+19	41.7458824
71	4.57086E+19	45.7086134
72	5.00475E+19	50.0475068
73	5.47983E+19	54.7982702

[mds1]

Superseded by https://github.com/ethereum-optimism/design-docs/pull/147