Fix Buffer issues in Lightclient browser

[dapplion]

Motivation

Make the Lightcliient UI work in browser

Description

User browser friendly Uint8Array opts

[codeclimate]

Code Climate has analyzed commit 237903d and detected 0 issues on this pull request.

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[github-actions]

Performance Report

✔️ no performance regression detected

Full benchmark results

Benchmark suite	Current: 20b0a74	Previous: c40dfa5	Ratio
getCommitteeAssignments - req 1000 vs - 250000 vc	9.1082 ms/op	11.740 ms/op	0.78
epoch altair - 250000 vs - 7PWei - processJustificationAndFinalization	281.63 us/op	154.69 us/op	1.82
epoch altair - 250000 vs - 7PWei - processInactivityUpdates	2.6434 s/op	2.3781 s/op	1.11
epoch altair - 250000 vs - 7PWei - processRewardsAndPenalties	963.76 ms/op	1.0460 s/op	0.92
epoch altair - 250000 vs - 7PWei - processRegistryUpdates	15.271 us/op	13.506 us/op	1.13
epoch altair - 250000 vs - 7PWei - processSlashings	50.646 us/op	86.361 us/op	0.59
epoch altair - 250000 vs - 7PWei - processEffectiveBalanceUpdates	93.787 ms/op	114.95 ms/op	0.82
epoch altair - 250000 vs - 7PWei - processParticipationFlagUpdates	282.59 ms/op	267.68 ms/op	1.06
epoch altair - 250000 vs - 7PWei - prepareEpochProcessState	593.38 ms/op	564.72 ms/op	1.05
Process block - 250000 vs - 7PWei - with 0 validator exit	480.83 us/op	381.66 us/op	1.26
Process block - 250000 vs - 7PWei - with 1 validator exit	27.730 ms/op	32.916 ms/op	0.84
Process block - 250000 vs - 7PWei - with 16 validator exits	29.762 ms/op	25.560 ms/op	1.16
epoch phase0 - 250000 vs - 7PWei - processJustificationAndFinalization	129.83 us/op	97.370 us/op	1.33
epoch phase0 - 250000 vs - 7PWei - processRewardsAndPenalties	641.65 ms/op	623.30 ms/op	1.03
epoch phase0 - 250000 vs - 7PWei - processRegistryUpdates	19.078 us/op	20.951 us/op	0.91
epoch phase0 - 250000 vs - 7PWei - processSlashings	45.870 us/op	39.195 us/op	1.17
epoch phase0 - 250000 vs - 7PWei - processFinalUpdates	45.013 ms/op	45.358 ms/op	0.99
epoch phase0 - 250000 vs - 7PWei - prepareEpochProcessState	1.1241 s/op	987.69 ms/op	1.14
getAttestationDeltas - 250000 vs - 7PWei	88.358 ms/op	100.80 ms/op	0.88
processSlots - 250000 vs - 7PWei - 32 empty slots	6.8801 s/op	6.2046 s/op	1.11
shuffle list - 16384 els	1.8907 ms/op	2.7835 ms/op	0.68
shuffle list - 250000 els	25.890 ms/op	40.484 ms/op	0.64
getPubkeys - persistent - req 1000 vs - 250000 vc	19.371 us/op	21.138 us/op	0.92
BLS verify - blst-native	2.2317 ms/op	2.0457 ms/op	1.09
BLS verifyMultipleSignatures 3 - blst-native	4.5174 ms/op	4.3295 ms/op	1.04
BLS verifyMultipleSignatures 8 - blst-native	9.6880 ms/op	9.1128 ms/op	1.06
BLS verifyMultipleSignatures 32 - blst-native	38.330 ms/op	32.618 ms/op	1.18
BLS aggregatePubkeys 32 - blst-native	48.946 us/op	46.154 us/op	1.06
BLS aggregatePubkeys 128 - blst-native	184.76 us/op	170.52 us/op	1.08
getAttestationsForBlock	108.36 ms/op	158.13 ms/op	0.69
validate gossip signedAggregateAndProof - struct	6.4902 ms/op	5.3673 ms/op	1.21
validate gossip signedAggregateAndProof - treeBacked	5.4328 ms/op	5.1021 ms/op	1.06
validate gossip attestation - struct	2.5213 ms/op	2.3946 ms/op	1.05
validate gossip attestation - treeBacked	2.5869 ms/op	2.5226 ms/op	1.03

by benchmarkbot/action