SDK Wrappers (AccountTransactionBuilder + AncoreClient) MVP

[wheval]

SDK Wrappers (AccountTransactionBuilder + AncoreClient) MVP

Description:
Implement missing SDK “glue” so wallet/UI code can build and submit account operations end-to-end.

This task is the MVP subset of Issues #37-38.

Context:
You have contract invocation primitives (@ancore/account-abstraction) and a Stellar client (@ancore/stellar), but missing high-level wrappers:

• transaction builder convenience wrapper
• unified AncoreClient entry point

Requirements:

• Add packages/account-abstraction/src/transaction-builder.ts
  • fluent methods for session key add/revoke and contract execute ops
  • simulation helper for fee estimation
  • .build() returning a ready-to-sign Soroban transaction
• Implement packages/core-sdk/src/client.ts as AncoreClient
  • wallet create/import helpers (mnemonic → keypair → encrypt)
  • balance query + payment sending
  • smart account init + session key management
  • execute via session key (calls into account-abstraction)
• Add unit tests for builder + client orchestration

Files to Create:

• packages/account-abstraction/src/transaction-builder.ts
• packages/account-abstraction/src/__tests__/transaction-builder.test.ts
• packages/core-sdk/src/client.ts
• packages/core-sdk/src/__tests__/client.test.ts

Definition of Done:

• Builder builds valid Soroban transactions
• AncoreClient exposes a single consumer API for wallet flows
• Unit tests pass

Labels: sdk, transactions, core
Estimated Effort: 5–8 days
Priority: High

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[sudo-robi]

@sudo-robi has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

Hi, i am Paschal a full stack developer, smart contract dev and I would like to work on this.

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[sudo-robi]

@wheval I am still waiting to be assigned

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