@hyperlane-xyz/sdk/dist/metadata/chainMetadataConversion.js

The official SDK for the Hyperlane Network

import { defineChain } from 'viem';
import { ProtocolType } from '@hyperlane-xyz/utils';
import { test1 } from '../consts/testChains.js';
import { getChainIdNumber, } from '../metadata/chainMetadataTypes.js';
import { PROTOCOL_TO_DEFAULT_NATIVE_TOKEN } from '../token/nativeTokenMetadata.js';
export function chainMetadataToViemChain(metadata) {
    const rpcUrls = metadata.rpcUrls.map((rpcUrl) => rpcUrl.http);
    return defineChain({
        id: getChainIdNumber(metadata),
        name: metadata.displayName || metadata.name,
        network: metadata.name,
        nativeCurrency: metadata.nativeToken || test1.nativeToken,
        rpcUrls: {
            public: { http: rpcUrls },
            default: { http: rpcUrls },
        },
        blockExplorers: metadata.blockExplorers?.length
            ? {
                default: {
                    name: metadata.blockExplorers[0].name,
                    url: metadata.blockExplorers[0].url,
                },
            }
            : undefined,
        testnet: !!metadata.isTestnet,
    });
}
export function chainMetadataToCosmosChain(metadata) {
    const { name, displayName, chainId, rpcUrls, restUrls, isTestnet, nativeToken, bech32Prefix, slip44, gasPrice, } = metadata;
    if (!nativeToken)
        throw new Error(`Missing native token for ${name}`);
    const chain = {
        chain_name: name,
        chain_type: 'cosmos',
        status: 'live',
        network_type: isTestnet ? 'testnet' : 'mainnet',
        pretty_name: displayName || name,
        chain_id: chainId,
        bech32_prefix: bech32Prefix,
        slip44: slip44,
        apis: {
            rpc: [{ address: rpcUrls[0].http, provider: displayName || name }],
            rest: restUrls
                ? [{ address: restUrls[0].http, provider: displayName || name }]
                : [],
        },
        fees: {
            fee_tokens: [
                // if there is a gas price object available in the cosmos registry
                // config we infer the gas denom and prices from it, if not we take
                // the native token denom and omit the gas prices
                {
                    denom: gasPrice?.denom ?? nativeToken.denom,
                    ...(gasPrice?.amount
                        ? {
                            fixed_min_gas_price: parseInt(gasPrice.amount),
                            low_gas_price: parseInt(gasPrice.amount),
                            average_gas_price: parseInt(gasPrice.amount) * 1.5,
                            high_gas_price: parseInt(gasPrice.amount) * 3,
                        }
                        : {}),
                },
            ],
        },
        staking: {
            staking_tokens: [{ denom: nativeToken.denom }],
        },
    };
    const assets = {
        chain_name: name,
        assets: [
            {
                description: `The native token of ${displayName || name} chain.`,
                denom_units: [
                    { denom: nativeToken.denom, exponent: nativeToken.decimals },
                ],
                base: nativeToken.denom,
                name: nativeToken.name,
                display: nativeToken.denom,
                symbol: nativeToken.symbol,
                type_asset: 'sdk.coin',
            },
        ],
    };
    return { chain, assets };
}
export function chainMetadataToStarknetChain(metadata) {
    const httpUrls = metadata.rpcUrls
        .map((url) => {
        if (typeof url.http === 'string') {
            return url.http;
        }
        return null;
    })
        .filter((url) => url !== null);
    return {
        id: BigInt(metadata.chainId),
        name: metadata.name,
        network: metadata.name.toLowerCase(),
        nativeCurrency: {
            name: metadata.nativeToken?.name || 'Ether',
            symbol: metadata.nativeToken?.symbol || 'ETH',
            decimals: metadata.nativeToken?.decimals || 18,
            address: metadata.nativeToken?.denom ??
                PROTOCOL_TO_DEFAULT_NATIVE_TOKEN[ProtocolType.Starknet].denom,
        },
        testnet: metadata.isTestnet,
        rpcUrls: {
            default: {
                http: httpUrls,
            },
            public: {
                http: httpUrls,
            },
        },
    };
}
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