refactor(abstract-utxo): remove @bitgo/utxo-lib as a runtime dependency#8987
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Switch the instanceof check and Triple<BIP32> conversion path to use
fixedScriptWallet.RootWalletKeys from wasm-utxo. The other input shapes
(UtxoNamedKeychains, Triple<{pub}>, string[]) continue to work via the
existing toKeychainTriple/string-array branches.
Refs: T1-3279
Remove the unused toWasmECPair / ECPairKey helper (no src callers) and inline the isUtxoLibPsbt type guard into toWasmPsbt's narrowing branch. The file remains a bridge between utxolib and wasm-utxo types — its remaining callers (offlineVault/OfflineVaultHalfSigned.ts, impl/btc/inscriptionBuilder.ts, transaction/descriptor/parse.ts, transaction/fixedScript/signPsbtWasm.ts) still pass utxolib instances. Refs: T1-3279
…time deps All callers have been migrated off the wasmUtil bridge. Delete the file and move @bitgo/utxo-lib from dependencies to devDependencies in package.json. The dep is still required for tests (utxolib.testutil.AcidTest, network constants, BIP32 helpers). Refs: T1-3279
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davidkaplanbitgo
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Jun 10, 2026
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Summary
Completes the removal of `@bitgo/utxo-lib` as a runtime dependency from `modules/abstract-utxo`. The previous PR (#8915) migrated all call sites in `abstractUtxoCoin.ts` — this PR finishes the job in the adjacent files and drops `utxo-lib` from `dependencies` entirely.
Changes, in order:
Follows #8915 which removed the runtime dependency from `abstractUtxoCoin.ts`.
Test plan
Refs: T1-3279
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