OPDATA-6579: Add getEnvVarName to variable env vars

src/config/index.ts

@@ -532,6 +532,7 @@ type VariableEnvVarEntry<T extends ValidSettingValue> = {
 
 export interface Getter<T extends SettingValueType | undefined> {
   get(variable: string): T
+  getEnvVarName(variable: string): string
   entries(): VariableEnvVarEntry<Exclude<T, undefined>>[]
 }
 
@@ -593,8 +594,12 @@ export class EnvGetter<
     )
   }
 
+  private getCanonicalVariable(variable: string): string {
+    return variable.replace(/\W/g, '_').toUpperCase()
+  }
+
   get(variable: string): SettingType<T> {
-    const canonicalVariable = variable.replace(/\W/g, '_').toUpperCase()
+    const canonicalVariable = this.getCanonicalVariable(variable)
     if (canonicalVariable in this.variableMap) {
       return this.variableMap[canonicalVariable].value as SettingType<T>
     }
@@ -604,16 +609,23 @@ export class EnvGetter<
     if (!this.settingsDefinition.required) {
       return undefined as SettingType<T>
     }
-    const envName = getEnvName(
-      this.name.replace(this.settingsDefinition.variablePlaceholder, canonicalVariable),
-      this.prefix,
-    )
+    const envName = this.getEnvVarName(variable)
     throw new AdapterError({
       statusCode: 500,
       message: `Missing required environment variable: ${envName}`,
     })
   }
 
+  getEnvVarName(variable: string): string {
+    return getEnvName(
+      this.name.replace(
+        this.settingsDefinition.variablePlaceholder,
+        this.getCanonicalVariable(variable),
+      ),
+      this.prefix,
+    )
+  }
+
   entries(): VariableEnvVarEntry<SettingTypeWhenPresent<T>>[] {
     return Object.values(this.variableMap)
   }

test/config.test.ts

@@ -526,6 +526,27 @@ test.serial('Get variable env var entries', async (t) => {
   ])
 })
 
+test.serial('Get variable env var name', async (t) => {
+  const envVarsPrefix = 'PREFIX'
+  const customSettings = {
+    NETWORK_NETWORK_TYPE: {
+      description: 'Network type for the given blockchain',
+      type: 'enum',
+      options: ['mainnet', 'testnet'],
+      variablePlaceholder: 'NETWORK',
+    },
+  } as const
+
+  const config = new AdapterConfig(customSettings, { envVarsPrefix })
+  config.initialize()
+  config.validate()
+  t.is(
+    config.settings.NETWORK_NETWORK_TYPE.getEnvVarName('ethereum'),
+    'PREFIX_ETHEREUM_NETWORK_TYPE',
+  )
+  t.is(config.settings.NETWORK_NETWORK_TYPE.getEnvVarName('a.b$c'), 'PREFIX_A_B_C_NETWORK_TYPE')
+})
+
 test.serial('Setting name must not have invalid characters', async (t) => {
   const customSettings = {
     'NETWORK-RPC-URL': {