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Daniel DimitrovandGitHub 55278b441c chore: migrate tx-builder from safe-apps repo to this monorepo (#6953 )

* chore: migrate tx-builder from safe-apps repo to this monorepo

create-react-app is deprecated and I’ve migrated the code to vite.
web3 is deprecated and I’ve moved the code to ethersjs
the cypress tests were broken and I dropped them
original code used mui4 -> here we’ve migrated to mui6

* fix(tx-builder): remove build from tx-builder

* fix(tx-builder): vite config

* fix(tx-builder): linting

* fix(tx-builder): fix typo

* fix(tx-builder): don’t mutate array

* fix(tx-builder): fix exponential backtracking

* fix(tx-builder): git workflows

* fix(tx-builder): fix lint setup

* fix(tx-builder): align package dependencies

* fix(tx-builder): invalid react-dom version

* fix(tx-builder): git workflow

* fix(tx-builder): drag and drop was not working

react-beautiful-dnd was no longer supported and it was not compatible with react 19. Moved to @hello-pangea/dnd

* fix(tx-builder): fix pallet issues

2026-01-22 12:43:50 +01:00

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External APIs

Etherscan API

Used for fetching contract ABIs when not available from Safe Gateway.

Get Contract ABI

GET https://api.etherscan.io/api
  ?module=contract
  &action=getabi
  &address={contractAddress}
  &apikey={apiKey}

Response:

{
  "status": "1",
  "message": "OK",
  "result": "[{\"constant\":true,...}]"
}

Network Endpoints

Chain	Endpoint
Ethereum	api.etherscan.io
Goerli	api-goerli.etherscan.io
Polygon	api.polygonscan.com
Arbitrum	api.arbiscan.io
Optimism	api-optimistic.etherscan.io
Base	api.basescan.org

Sourcify API

Alternative source for verified contract ABIs.

Get Contract Metadata

GET https://sourcify.dev/server/files/any/{chainId}/{address}

Response includes full contract metadata with ABI.

RPC Endpoints

tx-builder uses the Safe Apps SDK's built-in provider, which proxies through the Safe{Wallet} host application. Direct RPC calls are made for:

Reading contract state (view/pure functions)
Estimating gas
Detecting proxy implementations

The provider is accessed via:

import { useSafeAppsSDK } from '@safe-global/safe-apps-react-sdk'
import { SafeAppProvider } from '@safe-global/safe-apps-provider'

const { sdk, safe } = useSafeAppsSDK()
const provider = new SafeAppProvider(safe, sdk)

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