/
AssertActionCreator.ts
171 lines (141 loc) · 5.61 KB
/
AssertActionCreator.ts
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import { sha256 } from 'hash.js'
import { Api as EosApi, JsonRpc, Serialize } from 'eosjs'
import { JsSignatureProvider } from 'eosjs/dist/eosjs-jssig'
import {
SignatureProviderRequestEnvelope,
ChainManifest,
hexToArray,
} from 'eosjs-signature-provider-interface'
import { TransactionInfo, Action, PermissionLevel } from 'eos/Transaction'
import getAssertAbiHex from 'contracts/eosio.assert.abi.hex'
import { DappInfo } from 'utils/manifest/DappInfo'
import { clone } from 'utils/helpers'
// tslint:disable-next-line:no-var-requires
const assertAbi = require('../../contracts/eosio.assert.abi.json')
export interface TransactionBundle {
transactionInfo: TransactionInfo
requestEnvelope: SignatureProviderRequestEnvelope
}
interface AssertActionParams {
transactionBundle: TransactionBundle
dappInfo: DappInfo
}
const ACCOUNT_NAME = 'eosio.assert'
const ACTION_NAME = 'require'
export default class AssertActionCreator {
private api: EosApi
constructor() {
const rpc = new JsonRpc(null)
const signatureProvider = new JsSignatureProvider([])
this.api = new EosApi({
rpc,
signatureProvider,
chainId: null,
})
this.api.transactionTypes = Serialize.getTypesFromAbi(Serialize.createInitialTypes(), assertAbi)
}
public transactionWithAssertAction(params: AssertActionParams): TransactionBundle {
params = clone(params)
const { transactionBundle: { transactionInfo, requestEnvelope } } = params
const { chainHash, manifestHash, abiHashes } = this.generateHashes(params)
const assertAction = this.generateAssertAction(chainHash, manifestHash, abiHashes, transactionInfo)
transactionInfo.actions.push(assertAction)
requestEnvelope.request.transactionSignature.abis.push({
accountName: ACCOUNT_NAME,
abi: getAssertAbiHex(),
})
return {
transactionInfo,
requestEnvelope,
}
}
private generateAssertAction(
chainHash: string,
manifestHash: string,
abiHashes: string[],
transaction: TransactionInfo,
): Action {
const { actions } = transaction
const authorizations: PermissionLevel[] = this.generateUnionOfAuthorizations(actions)
const updatedActions: any[] = this.formatActionsAsWhitelist(actions)
const assertAction: Action = {
account: ACCOUNT_NAME,
name: ACTION_NAME,
authorization: authorizations,
data: {
chain_params_hash: chainHash,
manifest_id: manifestHash,
actions: updatedActions,
abi_hashes: abiHashes,
},
}
return assertAction
}
private generateUnionOfAuthorizations(actions: Action[]) {
const authorizations: PermissionLevel[] = []
actions.forEach((action) =>
action.authorization.forEach((authorization) => {
if (!authorizations.some((auth) =>
auth.actor === authorization.actor && auth.permission === authorization.permission)) {
authorizations.push(authorization)
}
}),
)
return authorizations
}
private formatActionsAsWhitelist(actions: Action[]) {
// format actions as { contract: string, action: string }
return actions.map((action) =>
({ contract: action.account, action: action.name }),
)
}
private generateHashes(params: AssertActionParams) {
const { dappInfo: { chainManifest }, transactionBundle: { requestEnvelope, transactionInfo } } = params
const chainHash = this.getChainHash(params)
const manifestHash = this.getAppManifestHash(chainManifest)
const abiHashes = this.getAbiHashes(transactionInfo, requestEnvelope)
return { chainHash, manifestHash, abiHashes }
}
private getChainHash(params: AssertActionParams): string {
const { dappInfo: { appMetadataInfo: { appMetadata } }, transactionBundle: { requestEnvelope } } = params
const { chainId } = requestEnvelope.request.transactionSignature
const chainInfo = appMetadata.chains.find((chain) => chain.chainId === chainId)
const [, hash] = this.splitHashFromURL(chainInfo.icon)
const chainInfoUp = {
icon: hash,
chain_id: chainInfo.chainId,
chain_name: chainInfo.chainName,
}
const buffer = new Serialize.SerialBuffer({ textEncoder: new TextEncoder(), textDecoder: new TextDecoder() })
const chainKey = 'setchain'
this.api.serialize(buffer, chainKey, chainInfoUp)
const serializedChainInfo = buffer.asUint8Array()
const chainHash = sha256().update(serializedChainInfo).digest('hex')
return chainHash
}
private getAppManifestHash(chainManifest: ChainManifest): string {
const buffer = new Serialize.SerialBuffer({ textEncoder: new TextEncoder(), textDecoder: new TextDecoder() })
const manifestTypeKey = 'add_manifest'
this.api.serialize(buffer, manifestTypeKey, chainManifest.manifest)
const serializedAppManifest = buffer.asUint8Array()
const manifestHash = sha256().update(serializedAppManifest).digest('hex')
return manifestHash
}
private getAbiHashes(transaction: TransactionInfo, requestEnvelope: SignatureProviderRequestEnvelope): string[] {
const { abis } = requestEnvelope.request.transactionSignature
const uniqueContracts: Action[] = []
transaction.actions.forEach((action) => {
if (!uniqueContracts.some((uniqueAction) => uniqueAction.account === action.account)) {
uniqueContracts.push(action)
}
})
const serializedAbis = uniqueContracts.map((action) => {
return hexToArray(abis.find((abi) => abi.accountName === action.account).abi)
})
const abiHashes = serializedAbis.map((abi) => sha256().update(abi).digest('hex'))
return abiHashes
}
private splitHashFromURL(urlWithHash: string) {
return urlWithHash.split('#')
}
}