github.com/Bytom/bytom@v1.1.2-0.20210127130405-ae40204c0b09/cmd/bytomcli/commands/template.go

package commands

import (
	"fmt"

	"github.com/bytom/bytom/errors"
)

const (
	// contract TradeOffer's clause
	clauseTrade      = "00000000"
	clauseCancel     = "13000000"
	tradeOfferEnding = "1a000000"

	// contract Escrow's clause
	clauseApprove = "00000000"
	clauseReject  = "1a000000"
	escrowEnding  = "28000000"

	// contract LoanCollateral's clause
	clauseRepay          = "00000000"
	clauseDefault        = "1b000000"
	loanCollateralEnding = "26000000"

	// contract CallOption's clause
	clauseExercise   string = "00000000"
	clauseExpire     string = "20000000"
	callOptionEnding string = "2c000000"
)

var (
	errBadContractArguments = errors.New("bad contract arguments")
)

// common receiver template, the clause takes only one parameter without Signature in the contract that contains only one clause,
// or the clause takes no parameters in the contract with multiple clauses. In addition, clause's statement like "lock payment with program" or "unlock value"
var buildCommonRecvReqFmt = `
	{"actions": [
		{"type": "spend_account_unspent_output", "output_id": "%s", "arguments": [{"type": "data", "raw_data": {"value": "%s"}}]},
		{"type": "control_program", "asset_id": "%s", "amount": %s, "control_program": "%s"},
		{"type": "spend_account", "asset_id": "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "amount": %s, "account_id": "%s"}
	]}`

var buildCommonRecvReqFmtByAlias = `
	{"actions": [
		{"type": "spend_account_unspent_output", "output_id": "%s", "arguments": [{"type": "data", "raw_data": {"value": "%s"}}]},
		{"type": "control_program", "asset_alias": "%s", "amount": %s, "control_program": "%s"},
		{"type": "spend_account", "asset_alias": "BTM", "amount": %s, "account_alias": "%s"}
	]}`

// contract is LockWithPublicKey
var buildLockWithPublicKeyReqFmt = `
	{"actions": [
		{"type": "spend_account_unspent_output", "output_id": "%s", "arguments": [{"type": "raw_tx_signature", "raw_data": {"xpub": "%s", "derivation_path": ["%s", "%s"]}}]},
		{"type": "control_program", "asset_id": "%s", "amount": %s, "control_program": "%s"},
		{"type": "spend_account", "asset_id": "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "amount": %s, "account_id": "%s"}
	]}`

var buildLockWithPublicKeyReqFmtByAlias = `
	{"actions": [
		{"type": "spend_account_unspent_output", "output_id": "%s", "arguments": [{"type": "raw_tx_signature", "raw_data": {"xpub": "%s", "derivation_path": ["%s", "%s"]}}]},
		{"type": "control_program", "asset_alias": "%s", "amount": %s, "control_program": "%s"},
		{"type": "spend_account", "asset_alias": "BTM", "amount": %s, "account_alias": "%s"}
	]}`

// contract is LockWithMultiSig
var buildLockWithMultiSigReqFmt = `
	{"actions": [
		{"type": "spend_account_unspent_output", "output_id": "%s", "arguments": [{"type": "raw_tx_signature", "raw_data": {"xpub": "%s", "derivation_path": ["%s", "%s"]}},
				{"type": "raw_tx_signature", "raw_data": {"xpub": "%s", "derivation_path": ["%s", "%s"]}}]},
		{"type": "control_program", "asset_id": "%s", "amount": %s, "control_program": "%s"},
		{"type": "spend_account", "asset_id": "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "amount": %s, "account_id": "%s"}
	]}`

var buildLockWithMultiSigReqFmtByAlias = `
	{"actions": [
		{"type": "spend_account_unspent_output", "output_id": "%s", "arguments": [{"type": "raw_tx_signature", "raw_data": {"xpub": "%s", "derivation_path": ["%s", "%s"]}},
				{"type": "raw_tx_signature", "raw_data": {"xpub": "%s", "derivation_path": ["%s", "%s"]}}]},
		{"type": "control_program", "asset_alias": "%s", "amount": %s, "control_program": "%s"},
		{"type": "spend_account", "asset_alias": "BTM", "amount": %s, "account_alias": "%s"}
	]}`

// contract is LockWithPublicKeyHash
var buildLockWithPublicKeyHashReqFmt = `
	{"actions": [
		{"type": "spend_account_unspent_output", "output_id": "%s", "arguments": [{"type": "data", "raw_data": {"value": "%s"}},
				{"type": "raw_tx_signature", "raw_data": {"xpub": "%s", "derivation_path": ["%s", "%s"]}}]},
		{"type": "control_program", "asset_id": "%s", "amount": %s, "control_program": "%s"},
		{"type": "spend_account", "asset_id": "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "amount": %s, "account_id": "%s"}
	]}`

var buildLockWithPublicKeyHashReqFmtByAlias = `
	{"actions": [
		{"type": "spend_account_unspent_output", "output_id": "%s", "arguments": [{"type": "data", "raw_data": {"value": "%s"}},
				{"type": "raw_tx_signature", "raw_data": {"xpub": "%s", "derivation_path": ["%s", "%s"]}}]},
		{"type": "control_program", "asset_alias": "%s", "amount": %s, "control_program": "%s"},
		{"type": "spend_account", "asset_alias": "BTM", "amount": %s, "account_alias": "%s"}
	]}`

// contract is TradeOffer's clause trade, the code of clause contains only two statement with "lock payment with program" and "unlock value"
var buildTradeOfferClauseTradeReqFmt = `
	{"actions": [
		{"type": "spend_account_unspent_output", "output_id":"%s", "arguments": [{"type": "data", "raw_data": {"value": "%s"}}]},
		{"type": "control_program", "asset_id": "%s", "amount": %s, "control_program": "%s"},
		{"type": "spend_account", "asset_id": "%s", "amount": %s, "account_id": "%s"},
		{"type": "spend_account", "asset_id": "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "amount":%s, "account_id": "%s"},
		{"type": "control_program", "asset_id": "%s", "amount": %s, "control_program": "%s"}
	]}`

var buildTradeOfferClauseTradeReqFmtByAlias = `
	{"actions": [
		{"type": "spend_account_unspent_output", "output_id":"%s", "arguments": [{"type": "data", "raw_data": {"value": "%s"}}]},
		{"type": "control_program", "asset_alias": "%s", "amount": %s, "control_program": "%s"},
		{"type": "spend_account", "asset_alias": "%s", "amount": %s, "account_alias": "%s"},
		{"type": "spend_account", "asset_alias": "BTM", "amount": %s, "account_alias": "%s"},
		{"type": "control_program", "asset_alias": "%s", "amount": %s, "control_program": "%s"}
	]}`

// contract is TradeOffer's clause cancel
var buildTradeOfferClauseCancelReqFmt = `
	{"actions": [
		{"type": "spend_account_unspent_output", "output_id": "%s", "arguments": [{"type": "raw_tx_signature", "raw_data": {"xpub": "%s", "derivation_path": ["%s", "%s"]}},
				{"type": "data", "raw_data": {"value": "%s"}}]},
		{"type": "control_program", "asset_id": "%s", "amount": %s, "control_program": "%s"},
		{"type": "spend_account", "asset_id": "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "amount": %s, "account_id": "%s"}
	]}`

var buildTradeOfferClauseCancelReqFmtByAlias = `
	{"actions": [
		{"type": "spend_account_unspent_output", "output_id": "%s", "arguments": [{"type": "raw_tx_signature", "raw_data": {"xpub": "%s", "derivation_path": ["%s", "%s"]}},
				{"type": "data", "raw_data": {"value": "%s"}}]},
		{"type": "control_program", "asset_alias": "%s", "amount": %s, "control_program": "%s"},
		{"type": "spend_account", "asset_alias": "BTM", "amount": %s, "account_alias": "%s"}
	]}`

// contract is Escrow
var buildEscrowReqFmt = `
	{"actions": [
		{"type": "spend_account_unspent_output", "output_id": "%s", "arguments": [{"type": "raw_tx_signature", "raw_data": {"xpub": "%s", "derivation_path": ["%s", "%s"]}},
				{"type": "data", "raw_data": {"value": "%s"}}]},
		{"type": "control_program", "asset_id": "%s", "amount": %s, "control_program": "%s"},
		{"type": "spend_account", "asset_id": "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "amount":%s, "account_id": "%s"}
	]}`

var buildEscrowReqFmtByAlias = `
	{"actions": [
		{"type": "spend_account_unspent_output", "output_id":"%s", "arguments": [{"type": "raw_tx_signature", "raw_data": {"xpub": "%s", "derivation_path": ["%s", "%s"]}},
				{"type": "data", "raw_data": {"value": "%s"}}]},
		{"type": "control_program", "asset_alias": "%s", "amount": %s, "control_program": "%s"},
		{"type": "spend_account", "asset_alias": "BTM", "amount": %s, "account_alias": "%s"}
	]}`

// contract is LoanCollateral's clause repay, the code of clause contains only two statement with "lock payment with program" and "lock value with control_program"
var buildLoanCollateralClauseRepayReqFmt = `
	{"actions": [
		{"type": "spend_account_unspent_output", "output_id":"%s", "arguments": [{"type": "data", "raw_data": {"value": "%s"}}]},
		{"type": "control_program", "asset_id": "%s", "amount": %s, "control_program": "%s"},
		{"type": "control_program", "asset_id": "%s", "amount": %s, "control_program": "%s"},
		{"type": "spend_account", "asset_id": "%s", "amount": %s, "account_id": "%s"},
		{"type": "spend_account", "asset_id": "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "amount":%s, "account_id": "%s"}
	]}`

var buildLoanCollateralClauseRepayReqFmtByAlias = `
	{"actions": [
		{"type": "spend_account_unspent_output", "output_id":"%s", "arguments": [{"type": "data", "raw_data": {"value": "%s"}}]},
		{"type": "control_program", "asset_alias": "%s", "amount": %s, "control_program": "%s"},
		{"type": "control_program", "asset_alias": "%s", "amount": %s, "control_program": "%s"},
		{"type": "spend_account", "asset_alias": "%s", "amount": %s, "account_alias": "%s"},
		{"type": "spend_account", "asset_alias": "BTM", "amount": %s, "account_alias": "%s"}
	]}`

// contract is CallOption's clause exercise, the code of clause contains only two statement with "lock payment with program" and "unlock value"
var buildCallOptionClauseExerciseReqFmt = `
	{"actions": [
		{"type": "spend_account_unspent_output", "output_id":"%s", "arguments": [{"type": "raw_tx_signature", "raw_data": {"xpub": "%s", "derivation_path": ["%s", "%s"]}},
				{"type": "data", "raw_data": {"value": "%s"}}]},
		{"type": "control_program", "asset_id": "%s", "amount": %s, "control_program": "%s"},
		{"type": "spend_account", "asset_id": "%s", "amount": %s, "account_id": "%s"},
		{"type": "spend_account", "asset_id": "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "amount":%s, "account_id": "%s"},
		{"type": "control_program", "asset_id": "%s", "amount": %s, "control_program": "%s"}
	]}`

var buildCallOptionClauseExerciseReqFmtByAlias = `
	{"actions": [
		{"type": "spend_account_unspent_output", "output_id":"%s", "arguments": [{"type": "raw_tx_signature", "raw_data": {"xpub": "%s", "derivation_path": ["%s", "%s"]}},
				{"type": "data", "raw_data": {"value": "%s"}}]},
		{"type": "control_program", "asset_alias": "%s", "amount": %s, "control_program": "%s"},
		{"type": "spend_account", "asset_alias": "%s", "amount": %s, "account_alias": "%s"},
		{"type": "spend_account", "asset_alias": "BTM", "amount": %s, "account_alias": "%s"},
		{"type": "control_program", "asset_alias": "%s", "amount": %s, "control_program": "%s"}
	]}`

// contract arguments
type baseContractArg struct {
	accountInfo string
	assetInfo   string
	amount      string
	alias       bool
	program     string
	btmGas      string
	outputID    string
}

type basePubInfo struct {
	rootPub string
	path1   string
	path2   string
}

type innerContractArg struct {
	innerAccountInfo string
	innerAssetInfo   string
	innerAmount      string
	innerProgram     string
}

// addContractArgs add arguments for template contracts
func addContractArgs(contractName string, baseArg baseContractArg, specArgs []string, usage string) (buildReqStr string, err error) {
	switch contractName {
	case "LockWithPublicKey":
		if len(specArgs) != 3 {
			err = errors.WithDetailf(errBadContractArguments, "%s <rootPub> <path1> <path2> [flags]\n", usage)
			return
		}

		pubInfo := basePubInfo{
			rootPub: specArgs[0],
			path1:   specArgs[1],
			path2:   specArgs[2],
		}
		buildReqStr = addLockWithPublicKeyArg(baseArg, pubInfo)

	case "LockWithMultiSig":
		if len(specArgs) != 6 {
			err = errors.WithDetailf(errBadContractArguments, "%s <rootPub1> <path11> <path12> <rootPub2> <path21> <path22> [flags]\n", usage)
			return
		}

		pubInfos := [2]basePubInfo{
			{
				rootPub: specArgs[0],
				path1:   specArgs[1],
				path2:   specArgs[2],
			},
			{
				rootPub: specArgs[3],
				path1:   specArgs[4],
				path2:   specArgs[5],
			},
		}
		buildReqStr = addLockWithMultiSigArg(baseArg, pubInfos)

	case "LockWithPublicKeyHash":
		if len(specArgs) != 4 {
			err = errors.WithDetailf(errBadContractArguments, "%s <pubKey> <rootPub> <path1> <path2> [flags]\n", usage)
			return
		}

		pubkey := specArgs[0]
		pubInfo := basePubInfo{
			rootPub: specArgs[1],
			path1:   specArgs[2],
			path2:   specArgs[3],
		}
		buildReqStr = addLockWithPublicKeyHashArg(baseArg, pubInfo, pubkey)

	case "RevealPreimage":
		if len(specArgs) != 1 {
			err = errors.WithDetailf(errBadContractArguments, "%s <value> [flags]\n", usage)
			return
		}

		value := specArgs[0]
		buildReqStr = addRevealPreimageArg(baseArg, value)

	case "TradeOffer":
		switch {
		case len(specArgs) <= 0:
			err = errors.WithDetailf(errBadContractArguments, "%s <clauseSelector> (<innerAccountID|alias> <innerAssetID|alias> <innerAmount> <innerProgram>) | (<rootPub> <path1> <path2>) [flags]\n", usage)
		case specArgs[0] == clauseTrade:
			if len(specArgs) != 5 {
				err = errors.WithDetailf(errBadContractArguments, "%s <clauseSelector> <innerAccountID|alias> <innerAssetID|alias> <innerAmount> <innerProgram> [flags]\n", usage)
				return
			}

			inner := &innerContractArg{
				innerAccountInfo: specArgs[1],
				innerAssetInfo:   specArgs[2],
				innerAmount:      specArgs[3],
				innerProgram:     specArgs[4],
			}
			buildReqStr, err = addTradeOfferArg(baseArg, clauseTrade, inner, nil)

		case specArgs[0] == clauseCancel:
			if len(specArgs) != 4 {
				err = errors.WithDetailf(errBadContractArguments, "%s <clauseSelector> <rootPub> <path1> <path2> [flags]\n", usage)
				return
			}

			pubInfo := &basePubInfo{
				rootPub: specArgs[1],
				path1:   specArgs[2],
				path2:   specArgs[3],
			}
			buildReqStr, err = addTradeOfferArg(baseArg, clauseCancel, nil, pubInfo)

		case specArgs[0] == tradeOfferEnding:
			err = errors.WithDetailf(errBadContractArguments, "Clause ending was selected in contract %s, ending exit\n", contractName)
		default:
			err = errors.WithDetailf(errBadContractArguments, "selected clause [%s] error, contract %s's clause must in set [%s, %s, %s]\n",
				specArgs[0], contractName, clauseTrade, clauseCancel, tradeOfferEnding)
		}

	case "Escrow":
		switch {
		case len(specArgs) <= 0:
			err = errors.WithDetailf(errBadContractArguments, "%s <clauseSelector> <rootPub> <path1> <path2> <controlProgram> [flags]\n", usage)
		case specArgs[0] == clauseApprove || specArgs[0] == clauseReject:
			if len(specArgs) != 5 {
				err = errors.WithDetailf(errBadContractArguments, "%s <clauseSelector> <rootPub> <path1> <path2> <controlProgram> [flags]\n", usage)
				return
			}

			pubInfo := &basePubInfo{
				rootPub: specArgs[1],
				path1:   specArgs[2],
				path2:   specArgs[3],
			}
			controlProgram := specArgs[4]
			buildReqStr, err = addEscrowArg(baseArg, specArgs[0], pubInfo, controlProgram)

		case specArgs[0] == escrowEnding:
			err = errors.WithDetailf(errBadContractArguments, "Clause ending was selected in contract %s, ending exit\n", contractName)
		default:
			err = errors.WithDetailf(errBadContractArguments, "selected clause [%s] error, contract %s's clause must in set [%s, %s, %s]\n",
				specArgs[0], contractName, clauseApprove, clauseReject, escrowEnding)
		}

	case "LoanCollateral":
		switch {
		case len(specArgs) <= 0:
			err = errors.WithDetailf(errBadContractArguments, "%s <clauseSelector> (<innerAccountID|alias> <innerAssetID|alias> <innerAmount> <innerProgram> <controlProgram>) | (<controlProgram>) [flags]\n", usage)
		case specArgs[0] == clauseRepay:
			if len(specArgs) != 6 {
				err = errors.WithDetailf(errBadContractArguments, "%s <clauseSelector> <innerAccountID|alias> <innerAssetID|alias> <innerAmount> <innerProgram> <controlProgram> [flags]\n", usage)
				return
			}

			inner := &innerContractArg{
				innerAccountInfo: specArgs[1],
				innerAssetInfo:   specArgs[2],
				innerAmount:      specArgs[3],
				innerProgram:     specArgs[4],
			}
			controlProgram := specArgs[5]
			buildReqStr, err = addLoanCollateralArg(baseArg, specArgs[0], inner, controlProgram)

		case specArgs[0] == clauseDefault:
			if len(specArgs) != 2 {
				err = errors.WithDetailf(errBadContractArguments, "%s <clauseSelector> <controlProgram> [flags]\n", usage)
				return
			}

			controlProgram := specArgs[1]
			buildReqStr, err = addLoanCollateralArg(baseArg, specArgs[0], nil, controlProgram)

		case specArgs[0] == loanCollateralEnding:
			err = errors.WithDetailf(errBadContractArguments, "Clause ending was selected in contract %s, ending exit\n", contractName)
		default:
			err = errors.WithDetailf(errBadContractArguments, "selected clause [%s] error, contract %s's clause must in set:[%s, %s, %s]\n",
				specArgs[0], contractName, clauseRepay, clauseDefault, loanCollateralEnding)
		}

	case "CallOption":
		switch {
		case len(specArgs) <= 0:
			err = errors.WithDetailf(errBadContractArguments, "%s <clauseSelector> (<innerAccountID|alias> <innerAssetID|alias> <innerAmount> <innerProgram> <rootPub> <path1> <path2>) | (<controlProgram>) [flags]\n", usage)
		case specArgs[0] == clauseExercise:
			if len(specArgs) != 8 {
				err = errors.WithDetailf(errBadContractArguments, "%s <clauseSelector> <innerAccountID|alias> <innerAssetID|alias> <innerAmount> <innerProgram> <rootPub> <path1> <path2> [flags]\n", usage)
				return
			}

			inner := &innerContractArg{
				innerAccountInfo: specArgs[1],
				innerAssetInfo:   specArgs[2],
				innerAmount:      specArgs[3],
				innerProgram:     specArgs[4],
			}

			pubInfo := &basePubInfo{
				rootPub: specArgs[5],
				path1:   specArgs[6],
				path2:   specArgs[7],
			}
			buildReqStr, err = addCallOptionArg(baseArg, specArgs[0], inner, pubInfo, "")

		case specArgs[0] == clauseExpire:
			if len(specArgs) != 2 {
				err = errors.WithDetailf(errBadContractArguments, "%s <clauseSelector> <controlProgram> [flags]\n", usage)
				return
			}

			controlProgram := specArgs[1]
			buildReqStr, err = addCallOptionArg(baseArg, specArgs[0], nil, nil, controlProgram)

		case specArgs[0] == callOptionEnding:
			err = errors.WithDetailf(errBadContractArguments, "Clause ending was selected in contract %s, ending exit\n", contractName)
		default:
			err = errors.WithDetailf(errBadContractArguments, "selected clause [%s] error, contract %s's clause must in set:[%s, %s, %s]\n",
				specArgs[0], contractName, clauseExercise, clauseExpire, callOptionEnding)
		}

	default:
		err = errors.WithDetailf(errBadContractArguments, "Invalid contract template name [%s]", contractName)
	}

	return
}

func addLockWithPublicKeyArg(baseArg baseContractArg, pubInfo basePubInfo) (buildReqStr string) {
	buildReqFmt := buildLockWithPublicKeyReqFmt
	if baseArg.alias {
		buildReqFmt = buildLockWithPublicKeyReqFmtByAlias
	}

	buildReqStr = fmt.Sprintf(buildReqFmt, baseArg.outputID, pubInfo.rootPub, pubInfo.path1, pubInfo.path2,
		baseArg.assetInfo, baseArg.amount, baseArg.program, baseArg.btmGas, baseArg.accountInfo)

	return
}

func addLockWithMultiSigArg(baseArg baseContractArg, pubInfos [2]basePubInfo) (buildReqStr string) {
	buildReqFmt := buildLockWithMultiSigReqFmt
	if baseArg.alias {
		buildReqFmt = buildLockWithMultiSigReqFmtByAlias
	}

	buildReqStr = fmt.Sprintf(buildReqFmt, baseArg.outputID, pubInfos[0].rootPub, pubInfos[0].path1, pubInfos[0].path2,
		pubInfos[1].rootPub, pubInfos[1].path1, pubInfos[1].path2,
		baseArg.assetInfo, baseArg.amount, baseArg.program, baseArg.btmGas, baseArg.accountInfo)

	return
}

func addLockWithPublicKeyHashArg(baseArg baseContractArg, pubInfo basePubInfo, pubkey string) (buildReqStr string) {
	buildReqFmt := buildLockWithPublicKeyHashReqFmt
	if baseArg.alias {
		buildReqFmt = buildLockWithPublicKeyHashReqFmtByAlias
	}

	buildReqStr = fmt.Sprintf(buildReqFmt, baseArg.outputID, pubkey, pubInfo.rootPub, pubInfo.path1, pubInfo.path2,
		baseArg.assetInfo, baseArg.amount, baseArg.program, baseArg.btmGas, baseArg.accountInfo)

	return
}

func addRevealPreimageArg(baseArg baseContractArg, value string) (buildReqStr string) {
	buildReqFmt := buildCommonRecvReqFmt
	if baseArg.alias {
		buildReqFmt = buildCommonRecvReqFmtByAlias
	}

	buildReqStr = fmt.Sprintf(buildReqFmt, baseArg.outputID, value,
		baseArg.assetInfo, baseArg.amount, baseArg.program, baseArg.btmGas, baseArg.accountInfo)

	return
}

func addTradeOfferArg(baseArg baseContractArg, selector string, innerArg *innerContractArg, pubInfo *basePubInfo) (buildReqStr string, err error) {
	switch selector {
	case clauseTrade:
		if innerArg == nil {
			err = errors.New("Contract TradeOffer's clause trade argument is nil")
			return
		}

		buildReqFmt := buildTradeOfferClauseTradeReqFmt
		if baseArg.alias {
			buildReqFmt = buildTradeOfferClauseTradeReqFmtByAlias
		}

		buildReqStr = fmt.Sprintf(buildReqFmt, baseArg.outputID, selector,
			innerArg.innerAssetInfo, innerArg.innerAmount, innerArg.innerProgram,
			innerArg.innerAssetInfo, innerArg.innerAmount, innerArg.innerAccountInfo,
			baseArg.btmGas, baseArg.accountInfo,
			baseArg.assetInfo, baseArg.amount, baseArg.program)

	case clauseCancel:
		if pubInfo == nil {
			err = errors.New("Contract TradeOffer's clause cancel argument is nil")
			return
		}

		buildReqFmt := buildTradeOfferClauseCancelReqFmt
		if baseArg.alias {
			buildReqFmt = buildTradeOfferClauseCancelReqFmtByAlias
		}

		buildReqStr = fmt.Sprintf(buildReqFmt, baseArg.outputID, pubInfo.rootPub, pubInfo.path1, pubInfo.path2, selector,
			baseArg.assetInfo, baseArg.amount, baseArg.program, baseArg.btmGas, baseArg.accountInfo)

	default:
		err = errors.New("Invalid contract clause selector")
	}

	return
}

func addEscrowArg(baseArg baseContractArg, selector string, pubInfo *basePubInfo, controlProgram string) (buildReqStr string, err error) {
	switch selector {
	case clauseApprove, clauseReject:
		if pubInfo == nil {
			err = errors.New("Contract Escrow's clause argument is nil")
			return
		}

		buildReqFmt := buildEscrowReqFmt
		if baseArg.alias {
			buildReqFmt = buildEscrowReqFmtByAlias
		}

		buildReqStr = fmt.Sprintf(buildReqFmt, baseArg.outputID, pubInfo.rootPub, pubInfo.path1, pubInfo.path2, selector,
			baseArg.assetInfo, baseArg.amount, controlProgram, baseArg.btmGas, baseArg.accountInfo)

	default:
		err = errors.New("Invalid contract clause selector")
	}

	return
}

func addLoanCollateralArg(baseArg baseContractArg, selector string, innerArg *innerContractArg, controlProgram string) (buildReqStr string, err error) {
	switch selector {
	case clauseRepay:
		if innerArg == nil {
			err = errors.New("Contract LoanCollateral's clause repay argument is nil")
			return
		}

		buildReqFmt := buildLoanCollateralClauseRepayReqFmt
		if baseArg.alias {
			buildReqFmt = buildLoanCollateralClauseRepayReqFmtByAlias
		}

		buildReqStr = fmt.Sprintf(buildReqFmt, baseArg.outputID, selector,
			innerArg.innerAssetInfo, innerArg.innerAmount, innerArg.innerProgram,
			baseArg.assetInfo, baseArg.amount, controlProgram,
			innerArg.innerAssetInfo, innerArg.innerAmount, innerArg.innerAccountInfo,
			baseArg.btmGas, baseArg.accountInfo)

	case clauseDefault:
		buildReqFmt := buildCommonRecvReqFmt
		if baseArg.alias {
			buildReqFmt = buildCommonRecvReqFmtByAlias
		}

		buildReqStr = fmt.Sprintf(buildReqFmt, baseArg.outputID, selector,
			baseArg.assetInfo, baseArg.amount, controlProgram, baseArg.btmGas, baseArg.accountInfo)

	default:
		err = errors.New("Invalid contract clause selector")
	}

	return
}

func addCallOptionArg(baseArg baseContractArg, selector string, innerArg *innerContractArg, pubInfo *basePubInfo, controlProgram string) (buildReqStr string, err error) {
	switch selector {
	case clauseExercise:
		if innerArg == nil || pubInfo == nil {
			err = errors.New("Contract CallOption's clause exercise argument is nil")
			return
		}

		buildReqFmt := buildCallOptionClauseExerciseReqFmt
		if baseArg.alias {
			buildReqFmt = buildCallOptionClauseExerciseReqFmtByAlias
		}

		buildReqStr = fmt.Sprintf(buildReqFmt, baseArg.outputID, pubInfo.rootPub, pubInfo.path1, pubInfo.path2, selector,
			innerArg.innerAssetInfo, innerArg.innerAmount, innerArg.innerProgram,
			innerArg.innerAssetInfo, innerArg.innerAmount, innerArg.innerAccountInfo,
			baseArg.btmGas, baseArg.accountInfo,
			baseArg.assetInfo, baseArg.amount, baseArg.program)

	case clauseExpire:
		buildReqFmt := buildCommonRecvReqFmt
		if baseArg.alias {
			buildReqFmt = buildCommonRecvReqFmtByAlias
		}

		buildReqStr = fmt.Sprintf(buildReqFmt, baseArg.outputID, selector,
			baseArg.assetInfo, baseArg.amount, controlProgram, baseArg.btmGas, baseArg.accountInfo)

	default:
		err = errors.New("Invalid contract clause selector")
	}

	return
}