feat: add chain.blockTime

[jxom]

Chains are becoming a lot faster than Mainnet these days (OP Stack, ZKsync, etc). We should be adjusting the default polling interval/cache time to suit.

[changeset-bot]

🦋 Changeset detected

Latest commit: 99f7954

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
viem	Minor

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[vercel]

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Name	Status	Preview	Updated (UTC)
viem	🛑 Canceled (Inspect)		Jun 5, 2025 5:11pm

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.62%. Comparing base (835b02a) to head (99f7954).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3702   +/-   ##
=======================================
  Coverage   99.62%   99.62%           
=======================================
  Files        1023     1023           
  Lines       79869    79874    +5     
  Branches     3446     3448    +2     
=======================================
+ Hits        79567    79572    +5     
  Misses        283      283           
  Partials       19       19           

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[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
import * from 'viem' (esm)	70.35 KB (+0.12% 🔺)	1.5 s (+0.12% 🔺)	1.5 s (+50.53% 🔺)	2.9 s
const viem = require('viem') (cjs)	86.54 KB (-0.01% 🔽)	1.8 s (-0.01% 🔽)	1.1 s (-34.15% 🔽)	2.9 s
import { createClient, http } from 'viem'	4.57 KB (+0.37% 🔺)	92 ms (+0.37% 🔺)	79 ms (+161.47% 🔺)	171 ms
import * from 'viem/account-abstraction'	52.73 KB (+0.04% 🔺)	1.1 s (+0.04% 🔺)	1.1 s (+42.75% 🔺)	2.1 s
import * from 'viem/accounts'	82.32 KB (0%)	1.7 s (0%)	345 ms (-38.06% 🔽)	2 s
import { privateKeyToAccount } from 'viem/accounts'	20.71 KB (0%)	415 ms (0%)	386 ms (+61.35% 🔺)	800 ms
import { mnemonicToAccount } from 'viem/accounts'	27.07 KB (0%)	542 ms (0%)	425 ms (-14.21% 🔽)	967 ms
import * from 'viem/actions'	55.07 KB (0%)	1.2 s (0%)	1.2 s (-9.03% 🔽)	2.3 s
import { getBlockNumber } from 'viem/actions'	318 B (0%)	10 ms (0%)	6 ms (-83.2% 🔽)	16 ms
import * from 'viem/chains'	47.23 KB (+0.03% 🔺)	945 ms (+0.03% 🔺)	1.1 s (+13.55% 🔺)	2 s
import { mainnet } from 'viem/chains'	325 B (0%)	10 ms (0%)	38 ms (+1024.25% 🔺)	48 ms
import * from 'viem/chains/utils'	1.08 KB (0%)	22 ms (0%)	5 ms (-81.69% 🔽)	27 ms
import * from 'viem/ens'	47.81 KB (0%)	957 ms (0%)	464 ms (+2.8% 🔺)	1.5 s
import { getEnsAvatar } from 'viem/ens'	24.05 KB (0%)	481 ms (0%)	415 ms (-25.32% 🔽)	896 ms
import * from 'viem/siwe'	32.65 KB (0%)	653 ms (0%)	692 ms (+35.13% 🔺)	1.4 s
import { verifySiweMessage } from 'viem/siwe'	31.53 KB (0%)	631 ms (0%)	403 ms (-9.88% 🔽)	1.1 s

[aaronmgdr]

Suggested change

	blockTime: 2_000,
	blockTime: 1_000,

celo's block time is 1 second https://specs.celo.org/deployments.html?highlight=second#mainnet