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feat: add HPP Mainnet (190415) and HPP Sepolia (181228)#421

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feat: add HPP Mainnet (190415) and HPP Sepolia (181228)#421
nolnol3 wants to merge 1 commit into
mds1:mainfrom
nolnol3:add-hpp-mainnet

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@nolnol3 nolnol3 commented Jun 23, 2026

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Adds the HPP Mainnet and HPP Sepolia deployments of the canonical Multicall3.

Both are Arbitrum Orbit chains. Multicall3 is deployed at the canonical address 0xcA11bde05977b3631167028862bE2a173976CA11 on each, with bytecode byte-identical to the canonical Multicall3 and source verified as Multicall3 on Blockscout.

Network Chain ID Explorer (verified)
HPP Mainnet 190415 https://explorer.hpp.io/address/0xcA11bde05977b3631167028862bE2a173976CA11?tab=contract
HPP Sepolia 181228 https://sepolia-explorer.hpp.io/address/0xcA11bde05977b3631167028862bE2a173976CA11?tab=contract

getChainId() returns 190415 / 181228 respectively, and basic aggregate calls work as expected.

@nolnol3 nolnol3 changed the title feat: add HPP Mainnet (chainId 190415) feat: add HPP Mainnet (190415) and HPP Sepolia (181228) Jun 23, 2026
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