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ledger.ts
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ledger.ts
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import {
EthereumProvider,
SupportedProviders,
loadConnectKit,
} from '@ledgerhq/connect-kit-loader'
import type { Chain } from '@wagmi/chains'
import { EthereumProviderOptions } from '@walletconnect/ethereum-provider/dist/types/EthereumProvider'
import {
ProviderRpcError,
SwitchChainError,
UserRejectedRequestError,
createWalletClient,
custom,
getAddress,
numberToHex,
} from 'viem'
import { Connector } from './base'
import type { WalletClient } from './types'
import { normalizeChainId } from './utils/normalizeChainId'
type LedgerConnectorWcV1Options = {
walletConnectVersion?: 1
bridge?: string
chainId?: number
projectId?: never
rpc?: { [chainId: number]: string }
}
type LedgerConnectorWcV2Options = {
walletConnectVersion?: 2
projectId?: EthereumProviderOptions['projectId']
requiredChains?: number[]
requiredMethods?: string[]
optionalMethods?: string[]
requiredEvents?: string[]
optionalEvents?: string[]
}
type LedgerConnectorOptions = {
enableDebugLogs?: boolean
} & (LedgerConnectorWcV1Options | LedgerConnectorWcV2Options)
type ConnectConfig = {
/** Target chain to connect to. */
chainId?: number
}
export class LedgerConnector extends Connector<
EthereumProvider,
LedgerConnectorOptions
> {
readonly id = 'ledger'
readonly name = 'Ledger'
readonly ready = true
#provider?: EthereumProvider
#initProviderPromise?: Promise<void>
#isV1: boolean
get walletConnectVersion(): 1 | 2 {
if (this.options.walletConnectVersion)
return this.options.walletConnectVersion
else if ((this.options as LedgerConnectorWcV2Options).projectId) return 2
return 1
}
constructor(config: { chains?: Chain[]; options: LedgerConnectorOptions }) {
super({
...config,
options: { ...config.options },
})
this.#isV1 = this.walletConnectVersion === 1
}
async connect({ chainId }: ConnectConfig = {}) {
try {
const provider = await this.getProvider({ create: true })
this.#setupListeners()
// Don't request accounts if we have a session, like when reloading with
// an active WC v2 session
if (!provider.session) {
this.emit('message', { type: 'connecting' })
await provider.request({
method: 'eth_requestAccounts',
})
}
const account = await this.getAccount()
let id = await this.getChainId()
let unsupported = this.isChainUnsupported(id)
if (chainId && id !== chainId) {
const chain = await this.switchChain(chainId)
id = chain.id
unsupported = this.isChainUnsupported(id)
}
return {
account,
chain: { id, unsupported },
provider,
}
} catch (error) {
if (/user rejected/i.test((error as ProviderRpcError)?.message)) {
throw new UserRejectedRequestError(error as Error)
}
throw error
}
}
async disconnect() {
const provider = await this.getProvider()
try {
if (provider?.disconnect) await provider.disconnect()
} catch (error) {
if (!/No matching key/i.test((error as Error).message)) throw error
} finally {
this.#removeListeners()
this.#isV1 &&
typeof localStorage !== 'undefined' &&
localStorage.removeItem('walletconnect')
}
}
async getAccount() {
const provider = await this.getProvider()
const accounts = (await provider.request({
method: 'eth_accounts',
})) as string[]
const account = getAddress(accounts[0] as string)
return account
}
async getChainId() {
const provider = await this.getProvider()
const chainId = (await provider.request({
method: 'eth_chainId',
})) as number
return normalizeChainId(chainId)
}
async getProvider(
{ chainId, create }: { chainId?: number; create?: boolean } = {
create: false,
},
) {
if (!this.#provider || (this.#isV1 && create)) {
await this.#createProvider()
}
if (chainId) await this.switchChain(chainId)
return this.#provider!
}
async getWalletClient({
chainId,
}: { chainId?: number } = {}): Promise<WalletClient> {
const [provider, account] = await Promise.all([
this.getProvider({ chainId }),
this.getAccount(),
])
const chain = this.chains.find((x) => x.id === chainId)
if (!provider) throw new Error('provider is required.')
return createWalletClient({ account, chain, transport: custom(provider) })
}
async isAuthorized() {
try {
const account = await this.getAccount()
return !!account
} catch {
return false
}
}
async switchChain(chainId: number) {
const chain = this.chains.find((chain) => chain.id === chainId)
if (!chain)
throw new SwitchChainError(new Error('chain not found on connector.'))
try {
const provider = await this.getProvider()
await provider.request({
method: 'wallet_switchEthereumChain',
params: [{ chainId: numberToHex(chainId) }],
})
return chain
} catch (error) {
const message =
typeof error === 'string' ? error : (error as ProviderRpcError)?.message
if (/user rejected request/i.test(message)) {
throw new UserRejectedRequestError(error as Error)
}
throw new SwitchChainError(error as Error)
}
}
async #createProvider() {
if (!this.#initProviderPromise && typeof window !== 'undefined') {
this.#initProviderPromise = this.#initProvider()
}
return this.#initProviderPromise
}
async #initProvider() {
const connectKit = await loadConnectKit()
if (this.options.enableDebugLogs) {
connectKit.enableDebugLogs()
}
let checkSupportOptions
if (this.#isV1) {
const { chainId, bridge } = this.options as LedgerConnectorWcV1Options
checkSupportOptions = {
providerType: SupportedProviders.Ethereum,
walletConnectVersion: 1,
chainId,
bridge,
rpc: Object.fromEntries(
this.chains.map((chain) => [
chain.id,
chain.rpcUrls.default.http[0]!,
]),
),
}
} else {
const {
projectId,
requiredChains,
requiredMethods,
optionalMethods,
requiredEvents,
optionalEvents,
} = this.options as LedgerConnectorWcV2Options
const optionalChains = this.chains.map(({ id }) => id)
checkSupportOptions = {
providerType: SupportedProviders.Ethereum,
walletConnectVersion: 2,
projectId,
chains: requiredChains,
optionalChains,
methods: requiredMethods,
optionalMethods,
events: requiredEvents,
optionalEvents,
rpcMap: Object.fromEntries(
this.chains.map((chain) => [
chain.id,
chain.rpcUrls.default.http[0]!,
]),
),
}
}
connectKit.checkSupport(checkSupportOptions)
this.#provider =
(await connectKit.getProvider()) as unknown as EthereumProvider
}
#setupListeners() {
if (!this.#provider) return
this.#removeListeners()
this.#provider.on('accountsChanged', this.onAccountsChanged)
this.#provider.on('chainChanged', this.onChainChanged)
this.#provider.on('disconnect', this.onDisconnect)
this.#provider.on('session_delete', this.onDisconnect)
this.#provider.on('connect', this.onConnect)
}
#removeListeners() {
if (!this.#provider) return
this.#provider.removeListener('accountsChanged', this.onAccountsChanged)
this.#provider.removeListener('chainChanged', this.onChainChanged)
this.#provider.removeListener('disconnect', this.onDisconnect)
this.#provider.removeListener('session_delete', this.onDisconnect)
this.#provider.removeListener('connect', this.onConnect)
}
protected onAccountsChanged = (accounts: string[]) => {
if (accounts.length === 0) this.emit('disconnect')
else this.emit('change', { account: getAddress(accounts[0]!) })
}
protected onChainChanged = (chainId: number | string) => {
const id = normalizeChainId(chainId)
const unsupported = this.isChainUnsupported(id)
this.emit('change', { chain: { id, unsupported } })
}
protected onDisconnect = () => {
this.emit('disconnect')
}
protected onConnect = () => {
this.emit('connect', {})
}
}