Created configuration files by NODE_ENV

src/config/development.js

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+// @flow
+import { TX_SERVICE_HOST } from '~/config/names'
+
+const devConfig = {
+  [TX_SERVICE_HOST]: 'https://safe-transaction-history.dev.gnosisdev.com/api/v1/',
+}
+
+export default devConfig

src/config/index.js

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+// @flow
+import { ensureOnce } from '~/utils/singleton'
+import { TX_SERVICE_HOST } from '~/config/names'
+import devConfig from './development'
+import testConfig from './testing'
+import prodConfig from './production'
+
+const configuration = () => {
+  if (process.env.NODE_ENV === 'test') {
+    return testConfig
+  }
+
+  if (process.env.NODE_ENV === 'production') {
+    return prodConfig
+  }
+
+  return devConfig
+}
+
+const getConfig = ensureOnce(configuration)
+
+export const getTxServiceHost = () => {
+  const config = getConfig()
+
+  return config[TX_SERVICE_HOST]
+}
+
+export const getTxServiceUriFrom = (safeAddress: string) => `safes/${safeAddress}/transactions/`

src/config/names.js

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+// @flow
+
+export const TX_SERVICE_HOST = 'tsh'

src/config/production.js

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+// @flow
+import { TX_SERVICE_HOST } from '~/config/names'
+
+const prodConfig = {
+  [TX_SERVICE_HOST]: 'https://safe-transaction-history.dev.gnosisdev.com/api/v1/',
+}
+
+export default prodConfig

src/config/testing.js

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+// @flow
+import { TX_SERVICE_HOST } from '~/config/names'
+
+const testConfig = {
+  [TX_SERVICE_HOST]: 'http://localhost:8080/api/v1/',
+}
+
+export default testConfig