#692/discriminate fixes (#693)

Co-authored-by: Kris Kaczor <chris@kaczor.io>

Author: ShravanSunder

Diff for: .changeset/wild-bags-attack.md

@@ -0,0 +1,7 @@
+---
+'@typechain/hardhat': minor
+'typechain': minor
+---
+
+Expose `TypechainUserConfig` type. 
+Removed `contractName` from interface output see #692 for details.

Diff for: packages/hardhat/src/types.ts

@@ -1,11 +1,3 @@
-export interface TypechainUserConfig {
-  outDir?: string
-  target?: string
-  alwaysGenerateOverloads?: boolean
-  tsNocheck?: boolean
-  externalArtifacts?: string[]
-}
-
 export interface TypechainConfig {
   outDir: string
   target: string
@@ -14,3 +6,5 @@ export interface TypechainConfig {
   tsNocheck: boolean
   externalArtifacts?: string[]
 }
+
+export interface TypechainUserConfig extends Partial<TypechainConfig> {}

Diff for: packages/target-ethers-v5/src/codegen/index.ts

@@ -39,7 +39,6 @@ export function codegenContractTypings(contract: Contract, codegenConfig: Codege
   ${generateStructTypes(values(contract.structs).map((v) => v[0]))}
 
   export interface ${contract.name}Interface extends utils.Interface {
-    ${codegenConfig.discriminateTypes ? `contractName: '${contract.name}';\n` : ``}
     functions: {
       ${values(contract.functions)
         .flatMap((v) => v.map(generateInterfaceFunctionDescription))

Diff for: packages/typechain/src/typechain/runTypeChain.ts

@@ -13,7 +13,7 @@ interface Result {
   filesGenerated: number
 }
 
-const DEFAULT_FLAGS: CodegenConfig = {
+export const DEFAULT_FLAGS: CodegenConfig = {
   alwaysGenerateOverloads: false,
   discriminateTypes: false,
   tsNocheck: false,