feat: add support for multiple accounts (backport)

Makefile

@@ -120,7 +120,7 @@ test-short:
 ## test-race: Run unit tests in race mode.
 test-race:
 	@echo "--> Running tests in race mode"
-	@go test ./... -v -race -skip "TestPrepareProposalConsistency|TestIntegrationTestSuite|TestQGBRPCQueries|TestSquareSizeIntegrationTest|TestStandardSDKIntegrationTestSuite|TestTxsimCommandFlags|TestTxsimCommandEnvVar|TestMintIntegrationTestSuite|TestQGBCLI|TestUpgrade|TestMaliciousTestNode|TestMaxTotalBlobSizeSuite|TestQGBIntegrationSuite|TestSignerTestSuite|TestPriorityTestSuite|TestTimeInPrepareProposalContext|TestConcurrentTxSubmission"
+	@go test ./... -v -race -skip "TestPrepareProposalConsistency|TestIntegrationTestSuite|TestQGBRPCQueries|TestSquareSizeIntegrationTest|TestStandardSDKIntegrationTestSuite|TestTxsimCommandFlags|TestTxsimCommandEnvVar|TestMintIntegrationTestSuite|TestQGBCLI|TestUpgrade|TestMaliciousTestNode|TestMaxTotalBlobSizeSuite|TestQGBIntegrationSuite|TestSignerTestSuite|TestPriorityTestSuite|TestTimeInPrepareProposalContext|TestConcurrentTxSubmission|TestTxClientTestSuite"
 .PHONY: test-race
 
 ## test-bench: Run unit tests in bench mode.

pkg/user/account.go

@@ -0,0 +1,79 @@
+package user
+
+import (
+	"context"
+
+	codectypes "github.com/cosmos/cosmos-sdk/codec/types"
+	cryptotypes "github.com/cosmos/cosmos-sdk/crypto/types"
+	"github.com/cosmos/cosmos-sdk/types"
+	authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
+	"google.golang.org/grpc"
+)
+
+type Account struct {
+	name          string
+	address       types.AccAddress
+	pubKey        cryptotypes.PubKey
+	accountNumber uint64
+
+	// the signers local view of the sequence number
+	sequence uint64
+}
+
+func NewAccount(keyName string, accountNumber, sequenceNumber uint64) *Account {
+	return &Account{
+		name:          keyName,
+		accountNumber: accountNumber,
+		sequence:      sequenceNumber,
+	}
+}
+
+func (a Account) Name() string {
+	return a.name
+}
+
+func (a Account) Address() types.AccAddress {
+	return a.address
+}
+
+func (a Account) PubKey() cryptotypes.PubKey {
+	return a.pubKey
+}
+
+// Sequence returns the sequence number of the account.
+// This is locally tracked
+func (a Account) Sequence() uint64 {
+	return a.sequence
+}
+
+func (a *Account) Copy() *Account {
+	return &Account{
+		name:          a.name,
+		address:       a.address,
+		pubKey:        a.pubKey,
+		accountNumber: a.accountNumber,
+		sequence:      a.sequence,
+	}
+}
+
+// QueryAccountInfo fetches the account number and sequence number from the celestia-app node.
+func QueryAccountInfo(ctx context.Context, conn *grpc.ClientConn, registry codectypes.InterfaceRegistry, address types.AccAddress) (accNum uint64, seqNum uint64, err error) {
+	qclient := authtypes.NewQueryClient(conn)
+	// TODO: ideally we add a way to prove that the accounts rather than simply trusting the full node we are connected with
+	resp, err := qclient.Account(
+		ctx,
+		&authtypes.QueryAccountRequest{Address: address.String()},
+	)
+	if err != nil {
+		return accNum, seqNum, err
+	}
+
+	var acc authtypes.AccountI
+	err = registry.UnpackAny(resp.Account, &acc)
+	if err != nil {
+		return accNum, seqNum, err
+	}
+
+	accNum, seqNum = acc.GetAccountNumber(), acc.GetSequence()
+	return accNum, seqNum, nil
+}