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Sign Cosmos-EVM chains with Keplr
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| import { SigningStargateClient } from '@cosmjs/stargate' | |
| import { fromBase64, toBase64 } from '@cosmjs/encoding' | |
| import { makeAuthInfoBytes, makeSignDoc } from '@cosmjs/proto-signing' | |
| import { Int53 } from '@cosmjs/math' | |
| import { Any } from 'cosmjs-types/google/protobuf/any' | |
| import { PubKey } from 'cosmjs-types/cosmos/crypto/secp256k1/keys' | |
| import { AuthInfo, Fee, Tx, TxBody, TxRaw } from 'cosmjs-types/cosmos/tx/v1beta1/tx' | |
| import { isDev } from '@/helpers/env' | |
| import { OfflineDirectSigner } from '@cosmjs/proto-signing/build/signer' | |
| import { StdFee } from '@cosmjs/amino' | |
| import { SignMode } from 'cosmjs-types/cosmos/tx/signing/v1beta1/signing' | |
| import { SimulateRequest } from 'cosmjs-types/cosmos/tx/v1beta1/service' | |
| import { EncodeObject } from '@cosmjs/proto-signing/build/registry' | |
| import { Chain } from '@chain-registry/types' | |
| export const evmChainIds = [ | |
| 'dymension_1100-1', | |
| 'evmos_9001-2', | |
| 'acre_9052-1', | |
| 'canto_7700-1', | |
| 'blockx_100-1', | |
| ] | |
| interface ISignProps { | |
| client: SigningStargateClient | |
| signer: OfflineDirectSigner | |
| chain: Chain | |
| signerAddress: string | |
| messages: EncodeObject[] | |
| fee: StdFee | |
| memo: string | |
| } | |
| interface ISimulateProps { | |
| client: SigningStargateClient | |
| signer: OfflineDirectSigner | |
| chain: Chain | |
| signerAddress: string | |
| messages: EncodeObject[] | |
| memo: string | |
| } | |
| interface IAccount { | |
| account: { | |
| '@type': '/cosmos.auth.v1beta1.BaseAccount' | |
| address: string | |
| pub_key: { | |
| '@type': string | |
| key: string | |
| } | |
| account_number: string | |
| sequence: string | |
| } | |
| } | |
| interface IEthAccount { | |
| account: { | |
| '@type': '/ethermint.types.v1.EthAccount' | |
| base_account: { | |
| address: string | |
| pub_key: { | |
| '@type': string | |
| key: string | |
| } | |
| account_number: string | |
| sequence: string | |
| } | |
| code_hash: string | |
| } | |
| } | |
| export async function signEvmWithKeplr({ | |
| client, // SigningStargateClient | |
| signer, // keplr OfflineSigner | |
| chain, | |
| signerAddress, | |
| messages, | |
| fee, | |
| memo, | |
| }: ISignProps) { | |
| // Query account info, because cosmjs doesn't support Evmos account | |
| const accountRes = await fetch( | |
| `https://rest.cosmos.directory/${chain.chain_name}/cosmos/auth/v1beta1/accounts/${signerAddress}` | |
| ) | |
| isDev && console.log('signEvmWithKeplr accountRes', accountRes) | |
| if (!accountRes.ok) { | |
| throw new Error( | |
| 'Failed to retrieve account from signer: ' + (accountRes.statusText || accountRes.status) | |
| ) | |
| } | |
| const accountResJson: IAccount | IEthAccount = await accountRes.json() | |
| isDev && console.log('signEvmWithKeplr account', accountResJson.account) | |
| const sequence = BigInt( | |
| 'base_account' in accountResJson.account | |
| ? accountResJson.account.base_account.sequence | |
| : accountResJson.account.sequence | |
| ) | |
| const accountNumber = Number( | |
| 'base_account' in accountResJson.account | |
| ? accountResJson.account.base_account.account_number | |
| : accountResJson.account.account_number | |
| ) | |
| const accountFromSigner = (await signer.getAccounts()).find( | |
| (account) => account.address === signerAddress | |
| ) | |
| if (!accountFromSigner) { | |
| throw new Error('Failed to retrieve account from signer') | |
| } | |
| const pubkeyBytes = accountFromSigner.pubkey | |
| // Custom typeUrl for EVMOS | |
| const pubk = Any.fromPartial({ | |
| typeUrl: '/ethermint.crypto.v1.ethsecp256k1.PubKey', | |
| value: PubKey.encode({ | |
| key: pubkeyBytes, | |
| }).finish(), | |
| }) | |
| const txBodyEncodeObject = { | |
| typeUrl: '/cosmos.tx.v1beta1.TxBody', | |
| value: { | |
| messages, | |
| memo, | |
| }, | |
| } | |
| isDev && console.log('signEvmWithKeplr txBodyEncodeObject', txBodyEncodeObject) | |
| isDev && console.log('signEvmWithKeplr fee', fee) | |
| const txBodyBytes = client.registry.encode(txBodyEncodeObject) | |
| const gasLimit = Int53.fromString(fee.gas).toNumber() | |
| const authInfoBytes = makeAuthInfoBytes( | |
| [{ pubkey: pubk, sequence }], | |
| fee.amount, | |
| gasLimit, | |
| undefined, | |
| undefined | |
| ) | |
| const signDoc = makeSignDoc(txBodyBytes, authInfoBytes, chain.chain_id, accountNumber) | |
| isDev && console.log('signEvmWithKeplr signDoc', signDoc) | |
| const { signature, signed } = await signer.signDirect(signerAddress, signDoc) | |
| // returns txBytes for broadcast | |
| return TxRaw.encode({ | |
| bodyBytes: signed.bodyBytes, | |
| authInfoBytes: signed.authInfoBytes, | |
| signatures: [fromBase64(signature.signature)], | |
| }).finish() | |
| } | |
| export async function simulateEvmWithKeplr({ | |
| client, // SigningStargateClient | |
| signer, // keplr OfflineSigner | |
| chain, | |
| signerAddress, | |
| messages, | |
| memo, | |
| }: ISimulateProps): Promise<string> { | |
| // Query account info, because cosmjs doesn't support Evmos account | |
| const accountRes = await fetch( | |
| `https://rest.cosmos.directory/${chain.chain_name}/cosmos/auth/v1beta1/accounts/${signerAddress}` | |
| ) | |
| // { | |
| // "account": { | |
| // "@type": "/cosmos.auth.v1beta1.BaseAccount", | |
| // "address": "dym..", | |
| // "pub_key": { | |
| // "@type": "/ethermint.crypto.v1.ethsecp256k1.PubKey", | |
| // "key": "asdf" | |
| // }, | |
| // "account_number": "345797", | |
| // "sequence": "3" | |
| // } | |
| // } | |
| isDev && console.log('signEvmWithKeplr accountRes', accountRes) | |
| if (!accountRes.ok) { | |
| throw new Error( | |
| 'Failed to retrieve account from signer: ' + (accountRes.statusText || accountRes.status) | |
| ) | |
| } | |
| const accountResJson: IAccount | IEthAccount = await accountRes.json() | |
| isDev && console.log('signEvmWithKeplr account', accountResJson.account) | |
| const sequence = BigInt( | |
| 'base_account' in accountResJson.account | |
| ? accountResJson.account.base_account.sequence | |
| : accountResJson.account.sequence | |
| ) | |
| const accountFromSigner = (await signer.getAccounts()).find( | |
| (account) => account.address === signerAddress | |
| ) | |
| if (!accountFromSigner) { | |
| throw new Error('Failed to retrieve account from signer') | |
| } | |
| const pubkeyBytes = accountFromSigner.pubkey | |
| // Custom typeUrl for EVMOS | |
| const pubk = Any.fromPartial({ | |
| typeUrl: '/ethermint.crypto.v1.ethsecp256k1.PubKey', | |
| value: PubKey.encode({ | |
| key: pubkeyBytes, | |
| }).finish(), | |
| }) | |
| const txBodyEncodeObject = { | |
| typeUrl: '/cosmos.tx.v1beta1.TxBody', | |
| value: { | |
| messages: messages, | |
| memo: memo, | |
| }, | |
| } | |
| isDev && console.log('signEvmWithKeplr txBodyEncodeObject', txBodyEncodeObject) | |
| const anyMsgs = messages.map((m) => client.registry.encodeAsAny(m)) | |
| isDev && console.log('signEvmWithKeplr anyMsgs', anyMsgs) | |
| const tx = Tx.fromPartial({ | |
| authInfo: AuthInfo.fromPartial({ | |
| fee: Fee.fromPartial({}), | |
| signerInfos: [ | |
| { | |
| publicKey: pubk, | |
| sequence, | |
| modeInfo: { single: { mode: SignMode.SIGN_MODE_UNSPECIFIED } }, | |
| }, | |
| ], | |
| }), | |
| body: TxBody.fromPartial({ | |
| messages: Array.from(anyMsgs), | |
| memo: memo, | |
| }), | |
| signatures: [new Uint8Array()], | |
| }) | |
| const request = SimulateRequest.fromPartial({ | |
| txBytes: Tx.encode(tx).finish(), | |
| }) | |
| isDev && console.log('signEvmWithKeplr toBase64(request.txBytes)', toBase64(request.txBytes)) | |
| const res = await fetch( | |
| `https://rest.cosmos.directory/${chain.chain_name}/cosmos/tx/v1beta1/simulate`, | |
| { | |
| method: 'POST', | |
| headers: { | |
| 'Content-Type': 'application/json', | |
| }, | |
| body: JSON.stringify({ tx_bytes: toBase64(request.txBytes) }), | |
| } | |
| ) | |
| if (!res.ok) { | |
| // TODO handle error json? | |
| console.error('Failed to simulate transaction:', res.statusText) | |
| throw new Error('Failed to simulate transaction: ' + (res.statusText || res.status)) | |
| } | |
| const data: { | |
| gas_info: { | |
| gas_used: string | |
| gas_wanted: string | |
| } | |
| } = await res.json() | |
| isDev && console.log('signEvmWithKeplr data', data) | |
| return data.gas_info.gas_used | |
| } |
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